the propulsive efficiency is expressed as the proportion of the mechanical energy actually used to propel the aircraft. The propulsive efficiency is always...

stages Overall efficiency thermal efficiency × propulsive efficiency Propulsive efficiency propulsive power/rate of production of propulsive kinetic energy...

less-than-ideal efficiency of the propulsive mechanism, whether a propeller, a jet exhaust, or a fan. In addition, propulsive efficiency is greatly dependent...

the exhaust stops in space and has no kinetic energy; and the propulsive efficiency is 100% all the energy ends up in the vehicle (in principle such...

weight, and with improved engine brake-specific fuel consumption and propulsive efficiency or thrust-specific fuel consumption. Endurance and range can be...

In addition to propulsive efficiency, another factor is cycle efficiency; a jet engine is a form of heat engine. Heat engine efficiency is determined by...

20–50 km/s (Isp 2000–5000 s), and possess thrusts of 25–250 mN and a propulsive efficiency 65–80% though experimental versions have achieved 100 kW (130 hp)...

unducted fan installations because their high propulsive efficiency gives them the overall efficiency characteristics of very high bypass turbofans....

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...

higher aircraft speed approaches the exhaust jet speed increasing propulsive efficiency). Turbojet engines had a significant impact on commercial aviation...

Wayback Machine Prof. Z. S. Spakovszky. "11.5 Trends in thermal and propulsive efficiency" MIT turbines, 2002. Thermodynamics and Propulsion Hall, Nancy (2021)...

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

huge amount of kinetic energy rearward. This phenomenon is termed propulsive efficiency ( η p {\displaystyle \eta _{p}} ).: 37–38  However, as speeds rise...

Aviation Week (6 February 1950). Aviation Week 1950-02-06. p. 22. "Propulsive Efficiency from an Energy Utilization Standpoint". The Cornell Engineer. 16...

penalty, but at the cost of increased fuel consumption (decreased fuel efficiency) which limits its use to short periods. This aircraft application of "reheat"...

combustion. Also, the shcramjet is believed to have a better overall propulsive performance than the scramjet at higher Mach numbers, especially above...

the bypass engine. The overall efficiency of the jet engine is thermal efficiency multiplied by propulsive efficiency ( η o = η t h η p r {\displaystyle...

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...

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

relatively small size of the duct limited the mass flow and thus the propulsive efficiency of the engine. In modern designs this is offset through high overall...

contra-rotating systems were designed to be used at takeoff for maximum power and efficiency under such conditions, and allowing one of the propellers to be disabled...

can have a recuperator capturing waste heat to improve the compressor efficiency, an intercooler and reheat. They rotate at over 40,000 RPM and a common...

ratio (EPR) Flameout Jet engine performance Overall pressure ratio Propulsive efficiency Specific impulse Thrust Thrust lapse Thrust specific fuel consumption...

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

symbol in: Thermodynamics, the efficiency of a Carnot heat engine, or packing fraction. Aeronautics, the propulsive efficiency, or percentage of chemical...

ratio (EPR) Flameout Jet engine performance Overall pressure ratio Propulsive efficiency Specific impulse Thrust Thrust lapse Thrust specific fuel consumption...

Astronomy portal Spaceflight portal Bi-elliptic transfer Gravity assist Propulsive efficiency Robert B. Adams, Georgia A. Richardson (25 July 2010). Using the...

ejector is a nozzle that converts the internal energy of a working gas into propulsive force; it is the nozzle, which forms a jet, that separates a gas turbine...

a variable-area fan nozzle (VAFN), which allows improvements in propulsive efficiency across a range of the flight envelope. However, the VAFN has since...

be achieved by generating aerodynamic lift associated with gliding or propulsive thrust, aerostatically using buoyancy, or by ballistic movement. Many...