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searching for Propulsive efficiency 44 found (135 total)

Sea Jet (190 words) [view diff] exact match in snippet view article find links to article

AWJ-21, a propulsion concept with the goals of providing increased propulsive efficiency, reduced acoustic signature, and improved maneuverability over previous

Propulsive wing (700 words) [view diff] exact match in snippet view article find links to article

distributed boundary-layer ingestion and wake filling increase propulsive efficiency, while distributed vectored thrust provides substantial improvements

Strouhal number (3,024 words) [view diff] exact match in snippet view article find links to article

peak-to-peak oscillation amplitude. In animal flight or swimming, propulsive efficiency is high over a narrow range of Strouhal constants, generally peaking

Finning techniques (3,094 words) [view diff] exact match in snippet view article find links to article

most appropriate finning style for the circumstances can increase propulsive efficiency, reduce fatigue, improve precision of maneuvering and control of

Jet engine performance (16,832 words) [view diff] exact match in snippet view article find links to article

performance-enhancing features such as the existence of bypass airflow (increased propulsive efficiency) only visually obvious on engines with a separate exit nozzle for

Nozzle (1,060 words) [view diff] exact match in snippet view article find links to article

produce thrust but an excessive speed difference wastes fuel (poor propulsive efficiency). Jet engines for subsonic flight use convergent nozzles with a

Ducted propeller (991 words) [view diff] exact match in snippet view article find links to article

1931 and later Ludwig Kort (1934) demonstrated that an increase in propulsive efficiency could be achieved by surrounding the propeller with a foil-shaped

Cessna XMC (520 words) [view diff] exact match in snippet view article find links to article

shrouded propeller to explore two design areas: improvement of the propulsive efficiency and noise reduction. The spatted nose gear was replaced by a wheel

Gas turbine (12,062 words) [view diff] exact match in snippet view article find links to article

ducted fan (turbofan) to reduce fuel consumption (by increasing propulsive efficiency) at subsonic flight speeds. An extra turbine is also required to

Pulsed plasma thruster (1,069 words) [view diff] exact match in snippet view article find links to article

heat transfer from the propellant to the rest of the spacecraft, propulsive efficiency (kinetic energy of exhaust / total energy used) is very low compared

Nautilus (5,512 words) [view diff] exact match in snippet view article find links to article

PMID 21347356. Neil, T. R.; Askew, G. N. (2018). "Swimming mechanics and propulsive efficiency in the chambered nautilus". Royal Society Open Science. 5 (2): 170467

Space launch (2,123 words) [view diff] exact match in snippet view article find links to article

than this is needed to be expended due to losses such as airdrag, propulsive efficiency, cycle efficiency of engines that are employed and gravity drag

Aerospace (3,530 words) [view diff] exact match in snippet view article find links to article

core stream and a bypass stream with a lower velocity for better propulsive efficiency: the first was the Rolls-Royce Conway with a 0.3 BPR on the Boeing

Sovetsky Soyuz-class battleship (4,867 words) [view diff] exact match in snippet view article find links to article

with similarly shaped motor launches suggested that the hull's propulsive efficiency would be 1 knot (1.9 km/h; 1.2 mph) less than planned, and this

William Froude (1,029 words) [view diff] case mismatch in snippet view article find links to article

April 1878). "The Elementary Relation between Pitch, Slip, and Propulsive Efficiency". Transactions of the Royal Institution of Naval Architects. 19:

Rolladen-Schneider LS8 (1,604 words) [view diff] exact match in snippet view article find links to article

small diameter 'paddle' propeller that sacrifices a small amount of propulsive efficiency in exchange for much smaller drag if the engine fails to start.

Front crawl (2,837 words) [view diff] exact match in snippet view article find links to article

have shown that very small changes in the arm stroke can impact propulsive efficiency. For example, position of fingers: "Most studies concluded that

Propfan (8,449 words) [view diff] case mismatch in snippet view article find links to article

54. OCLC 969306167. Kinney, Jeremy R. (2017). "4: The Quest for Propulsive Efficiency, 1976–1989" (PDF). The power for flight: NASA's contributions to

Ornithopter (4,176 words) [view diff] exact match in snippet view article find links to article

lift of over 8 pounds, an average thrust of 0.88 pounds, and a propulsive efficiency of 54%. The wings were tested in a low-speed wind tunnel measuring

New York-class battleship (3,499 words) [view diff] exact match in snippet view article find links to article

of the preceding class. However, it was discovered that greater propulsive efficiency of the reciprocating engine allowed a reduction in installed power

Webbed foot (3,158 words) [view diff] exact match in snippet view article find links to article

webbed feet, with a broad distal end, is specialized to increase propulsive efficiency by affecting a larger mass of water over generating increased lift

Fin (4,733 words) [view diff] exact match in snippet view article find links to article

effective. It has been calculated that some fish can achieve a propulsive efficiency greater than 90%. Fish can accelerate and maneuver much more effectively

Twin-boom aircraft (1,750 words) [view diff] exact match in snippet view article find links to article

requiring either a very long driveshaft or jet pipe and thus reducing propulsive efficiency. The twin-boom configuration allows a much shorter and more efficient

Energy conversion efficiency (3,008 words) [view diff] exact match in snippet view article find links to article

original (PDF) on October 7, 2008. "11.5 Trends in thermal and propulsive efficiency". web.mit.edu. Retrieved 2016-10-26. Govindjee, What is photosynthesis

Dassault Mirage 2000N/2000D (3,264 words) [view diff] exact match in snippet view article find links to article

100 ft/min) Wing loading: 410 kg/m2 (84 lb/sq ft) Thrust/weight: *Propulsive efficiency: 0.91 (non dimensional) Armament Hardpoints: 4× under-wing, 4× under

Kronshtadt-class battlecruiser (4,119 words) [view diff] exact match in snippet view article find links to article

would use three shafts increased the shaft loading and reduced propulsive efficiency, although it did shorten the length of the armored citadel and thus

Kronshtadt-class battlecruiser (4,119 words) [view diff] exact match in snippet view article find links to article

would use three shafts increased the shaft loading and reduced propulsive efficiency, although it did shorten the length of the armored citadel and thus

Blade element momentum theory (3,943 words) [view diff] case mismatch in snippet view article find links to article

April 1878). "The Elementary Relation between Pitch, Slip, and Propulsive Efficiency". Inst. Naval Architects. 19: 47 – via Hathi Trust. Wilson, Robert

Heritage-class cutter (2,800 words) [view diff] exact match in snippet view article find links to article

propellers (CPP), shaft lines, and Promas rudders, which offer increased propulsive efficiency and improved maneuverability. The Promas rudder, combined with the

Diver trim (2,513 words) [view diff] exact match in snippet view article find links to article

larger proportion of the total ballast, but do not interfere with propulsive efficiency the way ankle weights do. However, they may adversely affect roll

Physiology of underwater diving (15,297 words) [view diff] exact match in snippet view article find links to article

Swimming efficiency also affects diving ability, as low drag and high propulsive efficiency requires less energy for the same dive. Burst and glide locomotion

Fish fin (7,622 words) [view diff] exact match in snippet view article find links to article

effective. It has been calculated that some fish can achieve a propulsive efficiency greater than 90%. Fish can accelerate and maneuver much more effectively

British T-class submarine (6,544 words) [view diff] exact match in snippet view article find links to article

6,400 m (7,000 yd) at 41 kn (76 km/h; 47 mph). It had a greater propulsive efficiency than any contemporary torpedo of a similar size but shortages of

Unmanned aerial vehicle (12,586 words) [view diff] exact match in snippet view article find links to article

are under development with the goal of improving aerodynamic and propulsive efficiency. For such complex power installations, Battery elimination circuitry

Bio-inspired robotics (3,194 words) [view diff] exact match in snippet view article find links to article

landing. It is calculated that when swimming some fish can achieve a propulsive efficiency greater than 90%. Furthermore, they can accelerate and maneuver

Human factors in diving equipment design (18,374 words) [view diff] exact match in snippet view article find links to article

stroke, requiring additional power input for finning and reducing propulsive efficiency. The ability to shed ballast weight is considered a safety feature

Robotics (14,147 words) [view diff] exact match in snippet view article find links to article

pole. It is calculated that when swimming some fish can achieve a propulsive efficiency greater than 90%. Furthermore, they can accelerate and maneuver

Airbreathing jet engine (5,999 words) [view diff] exact match in snippet view article find links to article

nozzle to produce a high speed propelling jet Turbojets have a low propulsive efficiency below about Mach 2[citation needed] and produce a lot of jet noise

Diving weighting system (7,617 words) [view diff] exact match in snippet view article find links to article

larger proportion of the total ballast, but do not interfere with propulsive efficiency the way ankle weights do. There are not really any other convenient

Propeller theory (2,738 words) [view diff] exact match in snippet view article find links to article

\scriptstyle P'_{D}}) is termed relative rotative efficiency. The overall propulsive efficiency (an extension of effective power (PE{\displaystyle \scriptstyle

Blade element theory (4,350 words) [view diff] case mismatch in snippet view article find links to article

April 1878). "The Elementary Relation between Pitch, Slip, and Propulsive Efficiency". Inst. Naval Architects. 19: 47 – via Hathi Trust. This fact, which

Human physiology of underwater diving (12,008 words) [view diff] exact match in snippet view article find links to article

Swimming efficiency also affects diving ability, as low drag and high propulsive efficiency requires less energy for the same dive. Burst and glide locomotion

Future Vertical Lift (7,004 words) [view diff] exact match in snippet view article find links to article

configuration offers advantages in weight, drive train, and aerodynamic and propulsive efficiency. It has high speed, "robust" hover performance at altitude, higher

Compressor map (6,224 words) [view diff] exact match in snippet view article find links to article

interstage bleed. It was better known as an arrangement for better propulsive efficiency, a bypass engine. The Pratt & Whitney J58 used interstage overboard