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The jet velocity exceeds the speed of a subsonic aircraft by too great an amount to be an economical method of subsonic aircraft propulsion. The purpose behind the jet engine is to convert fuel energy into kinetic energy of the cycle air but after the thrust-producing momentum has appeared the unwanted byproduct is the wake velocity which ...
Velocity, Inc. is an American kit aircraft manufacturer. The company was founded in 1984 by Danny Maher, marketing a four-seat homebuilt aircraft based on the Long-EZ design. The first prototype flew in 1985.
Gear retraction of a Velocity on takeoff. The Velocity XL is 12 in (310 mm) longer and has a 20 in (510 mm) greater span than the SE. [3] The standard XL has a cruising range of 875 nautical miles (1,620 km; 1,007 mi) and a 75% power cruising speed of 185 knots (213 mph; 343 km/h) air speed.
The Velocity Model 173 SE (Standard Elite) is an entry-level canard pusher aircraft from Velocity Aircraft. [ 1 ] [ 2 ] [ 3 ] The four seat, rear engine aircraft may be powered by a 160 hp (120 kW) Lycoming IO-320 or a 200 hp (150 kW) Lycoming IO-360 engine.
Energy–maneuverability theory is a model of aircraft performance. It was developed by Col. John Boyd, a fighter pilot, and Thomas P. Christie, a mathematician with the United States Air Force, [1] and is useful in describing an aircraft's performance as the total of kinetic and potential energies or aircraft specific energy.
“Less than 100 flight hours per year, the math is quite clear that chartering is much more cost-effective than owning an aircraft outright.” How much does it cost to book a seat on a private jet?
For jet aircraft operating in the stratosphere (altitude approximately between 11 and 20 km), the speed of sound is approximately constant, hence flying at a fixed angle of attack and constant Mach number requires the aircraft to climb (as weight decreases due to fuel burn), without changing the value of the local speed of sound.
The tiny fleet of four E-4B National Airborne Operations Center aircraft, Boeing 747-200 airliners converted into airborne nuclear command posts, cost a staggering $372,496 an hour to fly, or $103 ...