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Drogue

A drogue is a type of drag device designed to provide resistance and stability, with primary applications in nautical, aerospace, and aerial refueling contexts.^[1] In nautical use, a drogue is typically a conical or funnel-shaped apparatus deployed from the stern of a vessel to slow its speed through water, maintain steerage way, and prevent broaching or rolling in heavy following seas, as demonstrated in tests by the Wolfson Unit at the University of Southampton for the Royal Ocean Racing Club.^[1] Distinct from a sea anchor, which is deployed from the bow to halt drift and face waves head-on, the drogue allows controlled downwind progress while reducing vessel speed to manageable levels, often around 4-7 knots in storm conditions.^[1] Notable designs include the series drogue, invented by naval architect Donald Jordan, which consists of multiple small cones on a line to sustain drag even when passing through wave crests.^[1] In aerospace applications, a drogue parachute is a small, high-drag canopy deployed from high-speed objects such as spacecraft or capsules to stabilize orientation, reduce descent velocity, and extract larger main parachutes.^[2] For instance, during NASA's Apollo program, two approximately 16.5-foot (5 m) diameter drogue parachutes with a drag coefficient of approximately 0.55 were used to stabilize the command module after reentry, deploying at altitudes around 25,000 feet to manage the wake effects and ensure controlled deceleration before main parachute deployment.^[3] Similar systems featured in the Mercury, Gemini, and Orion programs, where drogues mitigate aerodynamic instabilities in the spacecraft's turbulent wake, providing a full-scale drag area of about 221 square feet for Orion's configuration.^[2] These parachutes are constructed from permeable fabrics to handle supersonic or high-subsonic speeds, with deployment mechanisms like mortars ensuring reliable extraction.^[4] In military aviation, the term drogue also denotes the funnel-shaped receptacle at the end of a flexible fuel hose in the probe-and-drogue aerial refueling system, which enables mid-air fuel transfer between tanker and receiver aircraft.^[5] This method, preferred for smaller fighter jets and helicopters due to its simplicity and lower fuel flow demands compared to rigid boom systems, involves the receiver pilot inserting a rigid probe into the drogue, which stabilizes the connection and allows fuel transfer at rates up to 6,000 pounds per minute.^[6] Widely adopted by NATO allies and the U.S. Navy, the system enhances mission endurance by allowing refueling at typical speeds of 200-300 knots.^[5]

Definition and Principles

Definition

A drogue is a funnel-shaped or cylindrical device designed to generate drag in air or water, primarily to slow, stabilize, or orient vehicles and objects without producing lift.^[7] Unlike devices that rely on buoyancy or aerodynamic lift, a drogue creates resistance through its streamlined form, which allows it to trail behind a moving object and dampen motion in turbulent conditions.^[8] Key characteristics of drogues include construction from durable, flexible materials such as canvas, nylon, or other synthetics like polyester and ripstop fabrics, which provide strength while remaining lightweight and resistant to environmental stresses.^[8]^[9] These devices often feature collapsible or fixed conical designs with an open mouth and a narrower tail, enabling easy deployment and retrieval; they differ from full parachutes by having a smaller surface area and lacking a canopy structure intended for prolonged, controlled descent.^[10] The term "drogue" derives from Middle English "drugge," meaning a drag or trailing object, with origins linked to early whaling practices where wooden blocks or similar drags were attached to harpoon lines to slow pursued whales.^[11]^[12] Drogues are broadly categorized into types such as sea drogues for maritime use, drogue parachutes for aviation applications, and tracking drogues employed in oceanography to monitor currents.^[13]^[14]^[15]

Physical Principles

Drogues function primarily through the principles of fluid dynamics, generating drag to decelerate or stabilize objects moving relative to a surrounding fluid, such as air or water. The fundamental drag force F_d acting on a drogue is given by the equation

F_d = \frac{1}{2} \rho v^2 C_d A,

where \rho is the fluid density (approximately 1.225 kg/m³ for air at sea level and 1025 kg/m³ for seawater), v is the relative velocity of the object through the fluid, C_d is the dimensionless drag coefficient dependent on the drogue's shape and orientation, and A is the projected area perpendicular to the flow.^[16] This quadratic dependence on velocity arises from the dynamic pressure \frac{1}{2} \rho v^2, which represents the kinetic energy per unit volume of the fluid, multiplied by the effective area and efficiency factor C_d. In air, the lower density results in lower drag for equivalent geometries compared to water, where higher \rho amplifies the force significantly, often by a factor of about 800.^[16] Stability in drogue operation stems from the drag force providing a restorative torque that counters rotational disturbances, thereby reducing yaw (side-to-side rotation), pitch (up-and-down rotation), and roll (tilting) without requiring active propulsion. This occurs through the creation of a moment arm between the drogue's attachment point and the object's center of gravity, where the drag vector aligns with the resultant velocity, inducing hysteresis that damps oscillatory motions.^[17] For instance, off-axis perturbations generate asymmetric drag components that realign the object, promoting passive orientation toward the flow direction. In both aerial and aquatic contexts, this mechanism maintains directional stability by opposing deviations, with the effectiveness scaling with the drag magnitude and attachment geometry.^[17] Material and design choices critically influence drogue performance, particularly through their impact on C_d, which typically ranges from 0.5 to 1.5 for common configurations. Funnel-shaped or conical designs yield C_d values around 0.5–0.6 in air due to streamlined inflation and porosity, while parachute-like forms in water achieve 1.0–1.5 by maximizing form drag through billowing.^[18]^[19] Buoyancy considerations differ markedly: in water, drogues often incorporate weighting for submersion to optimize hydrodynamic drag, whereas aerial versions rely on lightweight fabrics like nylon for rapid deployment without buoyancy effects. Deployment dynamics favor conical shapes for quicker inflation via lower fill times, enhancing stability post-release.^[19] Drogues have inherent limitations tied to fluid dynamics thresholds and operational risks. Effective deployment requires a minimum velocity to fully inflate and generate sufficient drag—typically above 20 m/s in air for parachutes and proportional tow speeds in water—below which the device collapses and provides negligible resistance.^[20] Excessive drag at high velocities can lead to over-deceleration, potentially causing structural overload or instability, while entanglement risks arise from line fouling or incomplete separation in turbulent flows.^[21] These factors necessitate careful sizing to balance drag within safe operational envelopes.^[21]

History

Origins and Early Uses

The origins of the drogue trace back to 19th-century whaling practices, particularly among American whalers who attached wooden boards or floats—known as drogues—to harpoon lines to slow wounded whales and mark their positions at sea. These simple devices, often consisting of a two-foot block of wood or an inflated sealskin, created sufficient drag to tire the animal and prevent deep dives, enabling crews to pursue and lance it effectively. First documented in American whaling logs around the 1840s, this technique became a standard element of offshore whaling voyages, as described in contemporary narratives of Pacific expeditions.^[22] By the late 1800s, whalers adapted these concepts for broader maritime use, transitioning from rigid wooden floats to canvas sea drogues designed for small boats facing heavy storms. Pacific whalers, operating from ports like New Bedford and San Francisco, were instrumental in this evolution, repurposing drag devices to stabilize vessels by reducing leeway and maintaining headway into wind and waves. These early canvas constructions, typically conical frames covered in sailcloth, represented an improvisation from whaling gear to essential storm survival tools.^[23]^[24] Initial aviation applications emerged during World War I in the 1910s, when fabric drogues served as towed targets for aerial gunnery training. British and American forces deployed sleeve-like canvas drogues trailing 200–300 feet behind aircraft, simulating enemy planes for live-fire practice with machine guns mounted on flexible mounts. This method addressed the rapid evolution of air combat, allowing gunners to hone deflection shooting skills essential for dogfights.^[25] Throughout these early uses, drogues depended on readily available natural materials such as wood, sealskin, and canvas, with no standardized designs or manufacturing until the 20th century. Their efficacy stemmed from the fundamental drag principle of resistive force opposing motion through air or water, providing a low-tech means to control speed and orientation without complex mechanisms.^[26]

Modern Developments

Following World War II, advancements in aviation focused on enhancing aircraft recovery and stability through drogue parachutes. In the 1950s, the U.S. Air Force conducted extensive tests on drogue parachutes for high-speed aircraft recovery, including the development of systems like the Fulton surface-to-air recovery (STARS), which utilized drogues to facilitate mid-air extractions and stabilize descending platforms.^[27] These innovations built on wartime experiences, incorporating nylon fabrics introduced during the 1940s for superior strength and reduced weight compared to silk, enabling more reliable deployment under dynamic conditions.^[28] In maritime applications, the late 1970s saw the invention of the series drogue by naval architect Don Jordan, prompted by the 1979 Fastnet Race disasters, as a multi-cone device to distribute drag and prevent vessel capsize in extreme storms.^[29] U.S. Coast Guard evaluations in the 1980s, including full-scale and model tests documented in a 1987 report, demonstrated that series drogues significantly reduced broaching risks and wave-induced capsizing compared to traditional sea anchors, establishing them as a standard for offshore safety.^[30] A key milestone in aerial refueling emerged in the early 1950s with the adoption of the probe-and-drogue system, patented in 1958 but developed through U.S. Air Force trials using modified drop tanks for in-flight connections, enabling extended mission ranges for fighter aircraft.^[31] In space applications, NASA integrated drogue parachutes into the Apollo program during the 1960s for command module stabilization and initial deceleration upon reentry, with two 16.5-foot drogues deploying to orient the capsule before main parachutes.^[32] This approach influenced modern reusable spacecraft, such as SpaceX's Falcon 9, where drogue parachutes facilitate fairing recovery since the late 2010s, leveraging carbon composite materials for lightweight durability during ocean splashdowns.^[33] Standardization efforts advanced in the late 20th and early 21st centuries, with military specifications such as STANAG 3447 guiding aerial drogue designs for recovery systems and refueling, ensuring interoperability across U.S. forces.^[34] The International Organization for Standardization (ISO) established ISO 17339 in 2018 for sea anchors in survival craft, specifying performance criteria for maritime deployment to enhance global safety compliance.^[35] By the 2000s, digital modeling techniques, including computational fluid dynamics simulations, optimized drogue drag coefficients and inflation dynamics, reducing design iterations for applications from aviation to oceanography. In the 2020s, research into eco-friendly materials, such as seawater-degradable polymers like cellulose diacetate, has begun influencing oceanographic drogue prototypes to minimize environmental persistence after deployment.^[36]

Maritime Applications

Speed-Limiting and Series Drogues

Speed-limiting drogues are typically single, cone-shaped devices towed from the stern of a vessel to restrict forward speed in heavy weather conditions, capping hull speed at approximately 7-10 knots while maintaining steerability.^[13] These drogues feature a conical fabric or canvas structure, often 3-5 feet in diameter at the base, designed to create hydrodynamic drag without fully stopping the boat, and are commonly weighted with chain (10-20 feet) at the apex to ensure submersion and prevent skipping on the surface.^[13] The chain weighting promotes vertical stability, keeping the drogue submerged at a depth of 20-50 feet depending on line length and sea state, which helps in damping excessive yaw and preventing broaching in following seas.^[13] In contrast, series drogues consist of multiple small cones—ranging from 20 to 100 or more—spaced along a long, weighted retrieval line, providing distributed drag equivalent to a single large sea anchor while offering superior yaw damping.^[37] Invented in the 1980s by retired aeronautical engineer Don Jordan following analyses of yacht capsize incidents like the 1979 Fastnet Race, the series drogue uses 5-inch diameter fabric cones woven into a tapered double-braided nylon line (typically 200-300 feet long, tapering from 7/8-inch to 1/2-inch diameter), with a 15-25 pound chain weight at the end to form a hook shape and ensure the cones trail correctly.^[37] This configuration reduces boat yaw to less than 20 degrees in storm conditions, stabilizing the stern to waves and minimizing the risk of pitchpoling or rolling.^[37] Recent accounts as of 2025, such as those from sailors Nehaj and Susanne in extreme ocean conditions, continue to affirm the series drogue's effectiveness.^[38] Both types find primary application in heavy weather tactics for sailboats and multihulls, where they are deployed astern to control speed during downwind running in storms, preventing surfing speeds that could lead to loss of control.^[13] U.S. Coast Guard tests in the late 1980s, including full-scale evaluations at the Columbia River bar using motor lifeboats in breaking waves, demonstrated that series drogues reduced vessel speed to 1.5-2 knots—representing up to a 30% reduction in peak speeds without inducing stalling—while single-cone drogues suffered structural failure under similar loads.^[37] These tests confirmed the series drogue's reliability, with no damage upon retrieval, unlike traditional designs.^[37] Sizing for series drogues is determined by vessel length, with the approximate number of cones given by N \approx \frac{\text{[boat](/page/Boat) length in feet}}{2}, ensuring adequate drag for the hull's displacement and stability.^[13] Deployment involves paying out the full line from a stern cleat or bridle, allowing the drogues to stream naturally two waves astern; however, retrieval poses challenges, often requiring a dedicated winch and up to 20-30 minutes of effort due to high drag loads (thousands of pounds) and risks of line fouling or cone inversion if not handled carefully.^[37] In some cases, crews have resorted to cutting the line to avoid prolonged exposure in ongoing storms.^[37]

Improvised Drogues

In emergency situations at sea, sailors have improvised drogues using readily available materials such as boat fenders, old tires, large garbage bags, and sections of fishing nets lashed together with rope to create drag.^[39]^[40]^[41] These makeshift devices, often documented in survival accounts from solo sailors in the 1980s, provide a temporary means to slow the vessel and maintain stability when commercial options are unavailable.^[42] Construction techniques for improvised drogues typically involve simple assemblies, such as forming a funnel shape from a heavy tarp secured with ropes at the mouth and tail, or bundling fenders and tires with strong lines to trail astern. To ensure submersion and prevent skipping across waves, weights like sandbags or chain are added to the leading edge, creating a basic cone or series configuration that mimics engineered designs.^[40]^[10] These methods require robust attachment points on the vessel, such as stern cleats, to handle loads without failure. Improvised drogues generally offer 50-80% of the drag provided by commercial models but are prone to risks like uneven loading, material fatigue, and sudden parting under extreme conditions. Similarly, during a 2011 Atlantic crossing, Patrick and Amanda Marshall jury-rigged a drogue from onboard spares after rudder failure, successfully steering their 39-foot sloop Egret for 1,500 miles, though retrieval proved challenging due to chafe.^[43] These cases underscore the devices' utility in moderation but emphasize monitoring for wear. Guidelines for improvised drogues include sizing the effective diameter to approximately 1/10 of the boat's length overall for balanced drag—e.g., about 4 feet for a 40-foot vessel—and deploying only in moderate storms when purpose-built options like series drogues are absent, as they serve as a last resort rather than a primary tactic.^[13] Deployment should use a long rode (at least 5-7 times the drogue depth) to absorb shock loads and reduce broaching risks.^[10]

Aviation and Parachuting Applications

Drogue Parachutes for Deceleration and Stability

Drogue parachutes play a critical role in aerial applications by providing initial deceleration and enhancing stability during high-speed descents, preventing excessive oscillations or tumbling that could compromise subsequent parachute deployments or landings. Unlike main parachutes designed for significant lift and slow descent, drogue parachutes are smaller and generate controlled drag to orient and slow the falling object or vehicle, allowing for safer deployment of larger systems. These parachutes are deployed at velocities where aerodynamic forces are high, using their compact design to achieve rapid inflation without requiring ram-air inflation mechanisms.^[21] In skydiving, particularly tandem jumps, the drogue parachute serves as a reefed, small-diameter device, typically 4.5 to 5 feet in diameter, to stabilize the pair and reduce freefall velocity. Without it, the combined mass of instructor and student would result in terminal velocities exceeding 170-200 mph due to increased weight; the drogue limits this to approximately 120 mph, aligning with solo skydiver speeds for coordinated group jumps and aiding in the controlled deployment of the main canopy. This stability is essential for maintaining a flat, belly-to-earth orientation, minimizing spin risks during the initial freefall phase.^[44]^[45]^[46] For aircraft applications, drogue parachutes, often called tail drag chutes, are deployed post-touchdown to shorten landing rolls on runways, especially for high-performance fighters with fast approach speeds. For example, the F-4 Phantom employed a drag chute deployable at speeds up to 200 knots, providing rapid deceleration to reduce runway requirements by several thousand feet and lessen brake wear on short or contaminated surfaces. Deployment typically occurs between 150 and 200 knots, where the chute's drag force—generated by its conical or ribbon construction—effectively slows the aircraft without structural overload.^[47]^[48] Drogue parachutes feature an elongated, conical shape optimized for low drag coefficients and stability, relying on passive air capture rather than ram-air inflation, with construction from high-strength materials like Kevlar to withstand deployment shocks at Mach-level speeds. Their evolution traces to 1950s military airdrop operations, where small drogues stabilized cargo drops from bombers like the B-52, evolving into reliable systems for modern aviation by the 1970s through testing focused on reefing lines and gore configurations for controlled inflation.^[49]^[50] In terms of performance, drogue parachutes significantly enhance descent stability, as demonstrated in the Space Shuttle program's Solid Rocket Boosters (SRBs) during the 1980s. Each SRB used a 54-foot diameter drogue parachute deployed during descent at high subsonic speeds to orient and slow the booster, reducing velocity sufficiently for main parachute deployment at approximately 250 feet per second, ensuring controlled water impact at 80-90 feet per second and preventing structural damage. This system, tested extensively via air drops, achieved high reliability, with the drogue's design contributing to overall recovery success rates exceeding 99% across missions.^[51]^[52]^[53]

Aerial Refueling and Target Systems

In probe-and-drogue aerial refueling, a tanker aircraft trails a flexible hose ending in a drogue, which is a stabilizing, funnel-shaped basket approximately 2 feet in diameter, allowing receiver aircraft equipped with a protruding probe to connect and transfer fuel mid-flight.^[54] This system was invented by Sir Alan Cobham in 1950 and adopted by the U.S. Navy in the 1950s for operations involving early jet fighters like the F9F Panther and F2H Banshee, trailed from tankers such as the XAJ-1.^[55]^[56] Key components include a hose drum unit for reeling the hose, a pump to maintain fuel pressure, and the drogue basket itself, which uses aerodynamic drag to steady the hose against airflow.^[57] Flow rates typically reach up to 400 gallons per minute in configurations like those on the KC-135 tanker with drogue pods, enabling efficient refueling for high-performance aircraft.^[58] The system is compatible with probe-equipped receivers such as the F/A-18 Hornet and various helicopters, supporting simultaneous refueling of multiple aircraft from wing-mounted pods.^[55] Compared to the rigid boom method used primarily by the U.S. Air Force, the probe-and-drogue approach offers advantages for naval carrier operations, including simpler installation in space-constrained environments and reduced need for specialized operator training, as the receiver pilot controls the connection.^[56] This flexibility proved essential for carrier-based strikes, extending range and payload while minimizing vulnerability during launches and recoveries.^[56] Recent upgrades, such as those on the KC-46 Pegasus tanker introduced in the 2010s, incorporate advanced drogue systems with multiple refueling points and improved stabilization for higher-speed operations.^[57] Target drogues in military aviation consist of towed fabric sleeves, typically 20-30 feet long, deployed behind a tug aircraft to simulate enemy targets for air-to-air gunnery and missile practice.^[59] Their origins trace to World War II, when the U.S. Navy introduced standard sleeve types like the Mk 22 and Mk 23 for antiaircraft and aerial gunnery training, towed at speeds up to 200 knots to train gunners on moving targets. These early designs used lightweight textiles to create an inflated, stable form via airflow, with later WWII variants incorporating basic visibility enhancements for practice runs. Modern target drogues have evolved to include radar-reflective materials, such as metal foil laminates or copper meshes embedded within nylon or PVC-coated fabrics, improving detection by radar-guided weapons during training.^[59] These enhancements allow for realistic simulation of stealthy or low-observable threats, with sleeves like the S30Z series supporting speeds from 70 to 220 knots and integration with miss-distance indicators for scoring hits.^[59] Developments since the Cold War have incorporated GPS guidance in the towing aircraft or target systems to enable precise flight paths and repeatable scenarios, evolving from WWII fabric trails to high-fidelity tools for testing air-to-air missiles.^[59]

Other Applications

Oceanography and Fluid Dynamics

In oceanography, current-tracking drogues are sub-surface devices consisting of neutrally buoyant floats equipped with vanes or sails that follow water flow at targeted depths, typically ranging from 1 to 100 meters, to measure Lagrangian particle paths without significant deviation from ambient currents.^[60] These instruments have been employed by oceanographers since the late 19th century, with early examples including the U.S. Coast and Geodetic Survey's barrel drogue deployed in 1877 to track coastal currents.^[60] The design of these drogues emphasizes neutral buoyancy to maintain position at depth, paired with a drogue element—often a sail or vane measuring 0.5 to 2 meters in length or diameter—to enhance drag and minimize influences from surface winds and waves.^[61] This configuration ensures the float tracks subsurface flows more accurately than surface markers. Modern iterations integrate GPS for real-time positioning; for instance, RAFOS (Robust Acoustic Fish-receiving Oceanographic System) floats, developed in the 1990s, combine acoustic tracking with satellite telemetry to monitor deep currents up to 3,000 meters while surfacing periodically to transmit data.^[62] Such drogues have been instrumental in applications like mapping ocean gyres and tracing pollutant dispersion, providing Lagrangian trajectories that reveal circulation patterns.^[61] Data from the World Ocean Circulation Experiment (WOCE) in the 1990s, which deployed thousands of Surface Velocity Program drifters with drogues centered at 15 meters, yielded comprehensive maps of global surface and near-surface currents, highlighting mesoscale eddies and gyre boundaries.^[63] These observations have also supported pollution tracking efforts, such as monitoring plastic debris accumulation in gyres.^[64] Despite their utility, current-tracking drogues face limitations including biofouling from marine growth like barnacles, which can alter drag characteristics and reduce tracking accuracy over time, particularly on unprotected surfaces.^[65] Retrieval challenges arise due to unpredictable drift paths and occasional failure to surface for recovery signals, often resulting in one-way deployments.^[66] Compared to surface drifters, which are more susceptible to windage but easier to deploy en masse, subsurface drogues offer superior fidelity to water motion at depth but at the cost of higher complexity and potential drogue loss from shear forces.^[63]

Spacecraft and Experimental Uses

In spacecraft reentry systems, drogue parachutes play a critical role in attitude control and initial deceleration, deploying shortly after atmospheric interface to stabilize the vehicle before the main parachute sequence. The Soviet Soyuz capsule, first flown in 1967, exemplifies this application: at an altitude of 10.5–9.5 km, two small pilot parachutes (0.62 m² and 4.5 m²) extract the 24 m² drogue parachute, reducing descent speed from 230 m/s to 80 m/s while orienting the capsule for a controlled vertical descent.^[67] This stabilization prevents tumbling and ensures safe main parachute deployment at lower speeds, a design refined after early mission failures like Soyuz-1 in 1967.^[68] Similar drogue systems have been integral to crewed reentries since the 1960s, providing drag without excessive structural loads.^[67] For recovery operations, drogues enhance precision in post-reentry phases, such as marking splashdown locations for capsules or increasing drag on descending rocket components. Experimental applications extend drogue principles to innovative energy harvesting and amateur rocketry. In tidal energy prototypes developed in the 2020s, companies like Minesto have deployed kite-like drogues—underwater devices that harness slow ocean currents (as low as 1.2 m/s) by "flying" in a figure-eight pattern to amplify turbine speed and extract up to 1.2 MW from low-velocity flows, enabling low-cost deployment for remote microgrids. For example, as of 2024, Minesto's 1.2 MW Dragon 12 kite in the Faroe Islands has delivered electricity to the national grid.^[69] These lightweight systems, weighing up to 15 times less per MW than traditional tidal turbines, reduce installation costs through small-vessel operations and scalable designs tested in sites like the Faroe Islands.^[70] In amateur high-power rocketry, governed by organizations such as the National Association of Rocketry (NAR) and Tripoli Rocketry Association, drogue parachutes stabilize rockets during initial descent post-apogee, preventing uncontrolled oscillations in supersonic conditions and ensuring payload integrity before main chute deployment.^[71] For instance, 15-inch ballute-style drogues provide tangle-free drag for Level 3 certifications, maintaining orientation at descent rates of 100–200 ft/s.^[71] Key challenges in these high-velocity uses include deployment at Mach 1+ speeds, where disk-gap-band drogues face stability issues above Mach 1.5 due to wake-shock interactions causing cyclical area oscillations and drag fluctuations up to 50%.^[72] Non-axial forces can exacerbate unsteadiness, requiring reinforced designs with pull angles of 50–100 degrees to mitigate wake effects.^[72] Materials like Kevlar or Nylon provide heat resistance, but ablative coatings are essential for enduring reentry thermal loads exceeding 1,000°C, demanding larger safety margins to handle peak dynamic pressures.^[72]

Cultural and Fictional Representations

Depictions in Media

In maritime fiction, drogues are portrayed as vital tools for survival during intense storm sequences, often serving as the last line of defense against capsizing or uncontrolled drifting. The 2013 film All Is Lost, directed by J.C. Chandor and starring Robert Redford as a lone sailor, features a key scene where the protagonist deploys a drogue from his yacht's stern to slow the vessel and maintain heading amid massive waves in the Indian Ocean, underscoring the device's role in prolonging life against overwhelming odds.^[73] This depiction emphasizes the drogue's practical function while heightening dramatic tension, though sailors have noted inaccuracies in its deployment and effectiveness for narrative purposes.^[74] Aviation portrayals in media frequently highlight drogue parachutes for stabilization and refueling, symbolizing the high-precision risks of flight. In the 1986 film Top Gun, directed by Tony Scott, aerial refueling sequences illustrate the intense coordination required for mid-air operations, with probe-and-drogue systems representing the fine line between success and disaster in military aviation. Similarly, adventure films like the 1991 Point Break, directed by Kathryn Bigelow, incorporate skydiving scenes that evoke drogue chutes used in real tandem jumps for speed control and stability, portraying them as enablers of exhilarating, boundary-pushing exploits. Symbolically, drogues in media often embody humanity's tenuous grasp on control amid chaos, from battling oceanic fury to navigating aerial perils. In science fiction, such as the 2013 film Gravity, directed by Alfonso Cuarón, reentry sequences depict parachute systems, including drogues, as critical for capsule stabilization during atmospheric descent, mirroring the protagonist's fight for survival in the void of space. These representations, while dramatic, sometimes exaggerate scale for visual impact to amplify themes of resilience, though they can introduce technical liberties that prioritize plot over realism.

References

[1]
None
### Summary of Drogues and Sea Anchors from Appendix K
[2]
[PDF] Drogue Parachute Effects on the Orion Crew Module Stability
The wake of the CM significantly reduces the drogue chute riser line force, and the drogues have little upstream influence on the CM aerodynamics. These results ...
[3]
[PDF] Low-speed dynamic model investigation of apollo command module ...
At the time of the present investigation, it was intended that two drogue parachutes be used as a retardation and stabilization device for the Apollo command ...<|control11|><|separator|>
[4]
[PDF] drogue parachute mortar - (2 places) - NASA
At about 10,000 feet, the drogue parachutes are released and the three pilot parachutes are deployed; these pull the main para- chutes from the forward section ...Missing: definition | Show results with:definition
[5]
The Drogue: A Key to Deterrence - Niagara Falls Air Reserve Station
Mar 19, 2024 · The KC-135 has the ability to refuel many types of aircraft due to the boom and drogue , News page.Missing: definition | Show results with:definition
[6]
DROGUE Definition & Meaning - Merriam-Webster
1. sea anchor 2. a : a cylindrical or funnel-shaped device towed as a target by an airplane b : a small parachute for stabilizing or decelerating something.
[7]
Drogue: Sea Anchor for Speed Control and Stability - UK Sailmakers
A drogue is a sea anchor deployed off the stern to slow a boat, stabilize its movement, and maintain control by creating resistance in the water.Missing: definition nautical aviation
[8]
https://www.uksailmakers.com/encyclopedia/glossary/drogue/
[9]
Sea Anchors & Drogues - Practical Sailor
Sea anchors fix a boat in place, like a conventional anchor, while drogues control speed and stabilize course downwind, both by creating drag.Missing: nautical | Show results with:nautical
[10]
Storm Drogues and Sea Anchors, Explained
Sep 14, 2023 · To stay submerged, most drogues are weighted by a length of chain, by weights or by a small mushroom anchor attached to the end of the drogue.Missing: tracking | Show results with:tracking
[11]
Glossary - Drogue
Also know as a "drag," a drogue was attached to the harpoon line and thrown overboard, making it harder for the whale to swim and tiring it out. This ...Missing: etymology trail
[12]
Drogues | Victor Shane's Drag Device Data Base
A low-pull speed-limiting drogue is towed off the stern to help keep the boat aligned in strong following seas. Its partial braking mechanism limits the speed ...
[13]
Drifters, Drogues, and Circulation - The Oceanography Society
Oct 2, 2015 · Circulation within a body of water controls not only fluid transport but also, just as importantly, chemical, biological, and sedimentological constituents.
[14]
A Simple Technology for Efficient Ocean Current Monitoring
Dec 29, 2024 · The drogue current system consists of essential components, such as a surface buoy with GPS, a sub-surface drogue to stabilize and track ...
[15]
[PDF] Evaluation of Drogue Parachute Damping Effects Utilizing the Apollo ...
The GEMASS simulation computes the pitch, <p, and yaw, ~, angles generated by the motion of the drogue parachutes in time. These angles are the basis of the ...
[16]
[PDF] Overview of the Crew Exploration Vehicle Parachute Assembly ...
... parachute yields an average drag coefficient of 0.80 to 1.04,. Table 11. DDT-3 Drogue Parachute Predictions and. Results. Predicted. Actual. Peak load. 11,700 ...
[17]
Hydrodynamic drag of drogues and sea anchors for drift control of freefloating buoys
**Summary of Hydrodynamic Drag Coefficients and Related Details:**
[18]
Drogue parachute deployment dynamics of the space shuttle solid ...
In evaluating the volume integrals, all particles were assumed to move.with the velocity of the mass center, that is, vp = a2 K2 was used for the volume ...Missing: physics | Show results with:physics
[19]
[PDF] DEVELOPMENT AND TESTING OF A DROGUE PARACHUTE ...
This flow field nonuniformity means the drogue parachute experiences a different “effective” dynamic pressure, depending on its position within the flow field.Missing: definition | Show results with:definition
[20]
Narrative of a whaling voyage round the globe, from the ... - Whalesite
... drogue" is fastened, to impede the whale's flight, and thus afford a ... American whale-ship. Captain T. Stavers, of the Tuscan, when cruising in the ...
[21]
Sea Anchor - Collections
A sea anchor, also called a 'drogue', was usually a canvas-covered conical frame, designed to float behind a vessel to prevent drifting.
[22]
Blubber & Oil: Whaling and Its Role in the Industrial Revolution
Feb 19, 2023 · Before the exploitation of crude oil and the advent of the petroleum industry, the primary source of usable oil was obtained from whales.
[23]
[PDF] TRAINED BY THE ROYAL FLYING CORPS
The other part of aerial gunnery training, actual firing at a sleeve tar- get towed by another aeroplane, was carried out with Lewis guns on flexible mounts ...
[24]
[PDF] THE LAWS AND CUSTOMS OF ANGLO-AMERICAN WHALING ...
Legal scholars have cited whaling customs as evidence that property law is often created by participants and not imposed by legislatures and courts. Whaling law ...
[25]
May 3, 1966: Fulton Recovery System, Also Passed an Important ...
May 3, 2021 · The Fulton Recovery System, also known as Skyhook, passed an important milestone when the first human ground-to-air recoveries were made.
[26]
A Look Back....at the development of parachutes to 1945
Jan 5, 2021 · By the autumn of 1941, one thousand all-nylon parachutes were procured with a survey of production facilities revealing that a maximum of 16,000 ...
[27]
Don Jordan and the Jordan Series Drogue | Sailboat Owners Forums
Apr 19, 2009 · First, the Jordan Series drogue was developed and tested in conjunction with the US Coast Guard, and was specifically designed for helping ...Missing: 1980s | Show results with:1980s
[28]
[PDF] Coast Guard Report CG-D-20-87 - Jordan Series Drogue
Model and full-scale tests were conducted to investigate the use of drogues to prevent breaking wave capsizing of sailing yachts. A mathematical model was ...
[29]
US2849200A - Probe-drogue refueling means - Google Patents
This virtue of the probe-drogue system likewise entails certain disadvantages when the refueling is completed and. it is desired to break off contact. This is ...
[30]
60 Years Ago: Apollo Parachute Development and Testing - NASA
May 3, 2023 · Two 16.5-foot drogue parachutes opened 1.6 seconds later to provide initial deceleration and stabilization and remained attached to the CM until ...
[31]
SpaceX Fairing Recoveries - ElonX.net
Fairing is a two-piece protective shell made of aluminum and carbon composite at the tip of the Falcon 9 and Falcon Heavy rockets. Its purpose is to protect ...
[32]
[PDF] Aerial Refueling Probe/Drogue System - DTIC
Oct 15, 2018 · This document provides guidance for aerial refueling probe/drogue systems, focusing on tanker/receiver systems, fuel systems, and integration ...
[33]
Anchors aweigh: ISO guidelines for lifeboat safety just updated
Aug 3, 2018 · ISO 17339:2018, Ships and marine technology – Life saving and fire protection – Sea anchors for survival craft and rescue boats, specifies the requirements.Missing: drogues | Show results with:drogues
[34]
WHOI Scientists Discover Fastest Degrading Bioplastic in Seawater
Oct 17, 2024 · In collaboration with Eastman, WHOI scientists found that cellulose diacetate foam (CDA) is the fastest degrading bioplastic in an ocean ...Missing: drogues 2020s
[35]
Analysis & Lessons Learned: Sea Anchors
May 27, 2014 · ... yacht are the drogue and the sea-anchor. No serious trans-ocean yacht should leave port without one. To go with the equipment we need to ...
[36]
Sea Anchors | Victor Shane's Drag Device Data Base
As Fastnet '79 will bear witness, many of these boats can be rolled, capsized, thrown violently about, and still remain intact. The bow-cleat on such a boat can ...
[37]
PARA-ANCHOR by Fiorentino - The Original "Parachute Style" Sea ...
All parachute sea anchors must properly be weighted down. To accomplish this task you'll need to add two or three feet of chain to any lightweight sea anchor.
[38]
[PDF] the 1979 Fastnet Race inquiry
16%. Question: Were warps/drogue in use? 2-3.0 knots. 13. 17%. 4-5.9 knots ... Drogue/Sea Anchor. 4. 6%. 5%. No Answer. 13. No Answer. મૈં. 17%. 89%. 18. Page 17 ...<|separator|>
[39]
[PDF] WHAT IS THE JORDAN SERIES DROGUE
The series drogue has been developed using modern engineering technology, including model tests in wave c analysis, and full scale testing by the U.S. Coast ...
[40]
Slowing Devices: Cheapo Drogues for Cheapo Sailors - ALL AT SEA
Jun 10, 2016 · Fenders and tires are fine in little gales. However, in true storms, you'll need to do better. Thus, we collected Nylon discards from ...Missing: improvised materials sandbags
[41]
how to make a drogue or sea anchor | Boat Design Net
Jun 27, 2006 · The easiest is a couple of auto or truck tires towed astern with a VERY stout line. No fabrication , no cost. Works great.Missing: materials techniques
[42]
Garden waste bag as drogue? | YBW Forum
Jan 14, 2005 · Wouldn't something like the builder's bag be too big for a drogue but not big enough for a sea anchor? If a tyre works fine as a drogue then ...
[43]
[PDF] Egret's Atlantic Crossing Patrick Marshall - NET
and the consensus was that we should deploy a drogue astern to steer the boat. Fatty immediately came up with detailed instructions on how to improvise one.
[44]
https://www.chutingstar.com/upt-sigma-tandem-drogue
[45]
How Fast do you Fall When Skydiving?
Sep 21, 2021 · Thanks to the invention of the drogue, the standard speed reached during a modern tandem skydive is 120 mph.
[46]
Terminal Velocity Of A Skydiver
Dec 21, 2022 · The drogue helps slow down the tandem terminal velocity to a normal 120 mph. Without the drogue, the tandem skydivers would be around 200 mph!
[47]
Brake Chutes - Airliners.net
May 12, 2017 · All the drag chutes had a max airspeed failure point. For the F-4 it was round 200 knots. If it was deployed above that speed, then the cord ...
[48]
Use of the brake chute [Archive] - PPRuNe Forums
Jul 11, 2016 · For the F-4, Phantom, the recommended cross wind limit for drag chute deployment was 25 Kt and recommended maximum cross wind limit for the ...
[49]
[PDF] Parachute Recovery Systems Design Manual - DTIC
Dec 20, 2024 · ... Drogue G un Deploym ent ... Aerial M ines ............................................ 8-65. 8.6.5 Stabilization and Retardation of ...
[50]
Historical Review - ParachuteHistory.com
The parawing parachute, designed for maximum lift as opposed to maximum drag, was primarily used in sport parachuting during the 1970's. X-38 Recovery Ramair ...
[51]
[PDF] SPACE SHUTTLE SOLID ROCKET BOOSTER LIGHTWEIGHT ...
The lightweight recovery system aims to reduce SRB weight by 6000 pounds/SRB, with 5000 pounds from the parachute system, using new lightweight parachutes.
[52]
[PDF] Space Shuttle Solid Rocket Booster Retrieval System. Five ... - DTIC
Jul 10, 1980 · The SRB is decelerated by a drogue and three main parachutes. The SRB frustum and drogue separate from the main body of the booster upon ...
[53]
Solid Rocket Booster Large Main and Drogue Parachute Reliability ...
This reliability analysis is limited to the examination of the SRB Large Main Parachute (LMP) and drogue parachute failure history to assess the reliability of ...Missing: 1980s | Show results with:1980s
[54]
Innovative Concepts for Stabilization and Control of Aerial Refueling ...
Probe and Drogue refueling takes unique piloting skills to accomplish. Maneuvering a 4 inch diameter probe into the center of a 2 foot diameter drogue ( ...Missing: size | Show results with:size
[55]
Probe and Drogue Aerial Refueling Systems - ResearchGate
Probe and drogue refuelling was invented by Sir Alan Cobham in 1950 and has undergone and continues to undergo development since that date.
[56]
[PDF] Air Force Air Refueling for Naval Operations - DTIC
To help alleviate TAC's problem, the drogue adapter kit was developed to allow probe-equipped fighters to refuel from the boom-equipped SAC KC- 135s. This ...
[57]
The Evolution of Aerial Refueling Solutions - Brennan Blog
Nov 9, 2021 · A drogue is a netted type of expandable basket in the aerial refueling system which stabilizes the hose, providing a funnel guide insertion into ...
[58]
Aerial refueling - Wikipedia
The process of transferring aviation fuel from one aircraft (the tanker) to another (the receiver) while both aircraft are in flight.List of tanker aircraft · Omega Air Services · Boom operator (military)
[59]
Sleeve targets - AIR TARGET
Flight stability is achieved by the three air outlet holes at the end of the sleeve. SHORT radar reflective sleeve for LIGHT TOWING AIRCRAFT AND TARGET DRONES.Missing: drogue WWII modern developments GPS guided
[60]
[PDF] Trends in drogue design1,2 - Deep Blue Repositories
Mar 20, 1973 · Certain trends in drogue usage can be seen that limit the quality of the measurements obtained with the modern drogues. BASIC DROGUE MECHANICS.
[61]
Global Drifter Program
Tracking the location of drifters over time allows scientists to build a profile of ocean currents. A drifter's drogue, also known as a sea anchor, extends 20 ...
[62]
RAFOS Float - Woods Hole Oceanographic Institution
RAFOS floats are designed to take measurements of temperature, salinity, and pressure in layers of ocean water one to three thousand meters below the surface.
[63]
[PDF] DRIFTERS AND FLOATS - Woods Hole Oceanographic Institution
The basic WOCE drifter costs around $2500, ready for deployment. The WOCE drifter's drogue is centered at a depth of 15 m below the sea surface. The ratio ...
[64]
News: A More Bio-Friendly Drifter - Lagrangian Drifter Lab
In some cases, they are also used to help track and identify the conglomerations of plastic pollution in the ocean. When drifters stop transmitting useful ...
[65]
[PDF] Global Drifter Programme Barometer Drifter Design Reference
Studies have also shown slip in the presence of current shear is influenced by drogue length, the performance of drogues longer than 7 m begin to deviate from ...
[66]
[PDF] Measuring surface currents with Surface Velocity Program drifters
The drifters did not have sensors to indicate drogue presence, although two TIROS drifters recovered after 217 days at sea had drogues in “excellent condition” ...
[67]
Here is how Soyuz returns to Earth - RussianSpaceWeb.com
Nov 15, 2024 · The drogue parachute slows down the capsule from a speed of 230 meters per second to 80 meters per second (360 kilometers per hour). At this ...
[68]
ESA - Way back to Earth - European Space Agency
1. Two pilot parachutes. · 2. Drogue chute. It slows the spacecraft's descent from a rate of 230 m/s to 80 m/s. · 3. Main parachute. It slows the Soyuz to a ...
[69]
Updates - SpaceX
These tests include 13 successful single parachute drop tests, 12 successful multi-parachute tests, and a successful demonstration of the upgraded parachute ...Missing: 2020s | Show results with:2020s
[70]
Kite systems - Minesto
Discover the Dragon 4 (100 kW) – 4.9 m in wingspan – designed with microgrid installations in mind. ... A Minesto's power plant weighs up to 15 times less per MW ...Missing: prototypes 2020s
[71]
Drogue Parachutes - Apogee Rockets
4.9 133 · 60-day returnsMade from durable ripstop nylon with a calendared finish, this ballute type of parachute provides a high drag coefficient and reliable, ...Missing: synthetic | Show results with:synthetic
[72]
Supersonic Parachutes for Reentry Vehicles - GridPro Blog
Mar 2, 2020 · Supersonic parachutes brake the reentry vehicles' speed during atmospheric descent. Read to know supersonic parachutes' reentry ...<|separator|>
[73]
All Is Lost movie review & film summary (2013) - Roger Ebert
Rating 4/4 · Review by Ali ArikanIsn't it ironic that the movie "All Is Lost" with Robert Redford is not ... (The director is very unclear on the concept of "drogue".) It was downhill ...
[74]
Watch Skydiver Breaks Down Skydiving Scenes from Movies
May 3, 2021 · ... Point Break (1991 & 2015),' 'San Andreas,' 'Furious 7,' 'Iron Man 3 ... called a drogue chute which is a small round parachute. that's ...