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The high speed gear ratio of the impellers was not as high as the ratio used in the Allison, but impeller speed is not the only factor that determines engine performance, which is also a function of the size and pitch of the impeller blades. The gear-driven supercharger is a parasitic accessory; therefore, impeller gearing and blade profiles ...
Contra-rotating propellers Contra-rotating propellers on the Rolls-Royce Griffon-powered P-51XR Mustang Precious Metal at the 2014 Reno Air Races. Aircraft equipped with contra-rotating propellers (CRP) [1] coaxial contra-rotating propellers, or high-speed propellers, apply the maximum power of usually a single piston engine or turboprop engine to drive a pair of coaxial propellers in contra ...
Turboshaft - 80 hp (60 kW) at 56,700 turbine rpm T62T-27 Turboshaft - 150 hp (110 kW) at 61,250 turbine rpm, with 1x 8,000 and 1x 8,216 rpm outputs. [1] T62T-29 Turboshaft - 95 hp (71 kW) at 56,700 turbine rpm, for Lockheed Jetstar and Pan American Falcon business Jets at 56,700 turbine rpm, with 1x 8,000 and 1x 8,100 rpm outputs. [1] T62T-32A
Due to a rather large gap between the Mark 25 (20 hp) and the Mark 55 (40 hp), Mercury brought out the 4 in line, approximately 30 cubic inch "Mark 30" (30 horsepower) engine for 1956, and produced versions of its "TurboFour" engine for several years.
1,585 hp (1,182 kW) at 3,000 rpm at 3,800 ft (1,200 m); low-altitude version with supercharger impeller "cropped" to 9.5 in (241 mm) in diameter. Permitted boost was +18 psi (125 kPa gauge; or an absolute pressure of 225 kPa or 2.2 atm) instead of +16 psi (110 kPa gauge; or an absolute pressure of 210 kPa or 2.08 atm) on a normal Merlin 50 engine.
The simplest inlet to a centrifugal compressor is typically a simple pipe. Depending upon its use/application inlets can be very complex. They may include other components such as an inlet throttle valve, a shrouded port, an annular duct (see Figure 1.1), a bifurcated duct, stationary guide vanes/airfoils used to straight or swirl flow (see Figure 1.1), movable guide vanes (used to vary pre ...