Fans can be thought of as low pressure air pumps that utilize power from amotor to output a volumetric flow of air at a given pressure. A propellerconverts torque from the motor to increase static pressure across the fan rotorand to increase the kinetic energy of the air particles.

The bypass ratio is usually given as the mass flow of fan by the mass flow of core i.e. ˙mf˙mc:1. In some cases, it is given as the ratio of cold air to hot air, ˙mc˙mh:1. So, a bypass ratio of 9.6:1 means that 9.6 kg of air passes through the bypass fan for every 1 kg of air passing through the core.

The ratio of the fan discharge pressure to the fan inlet pressure.

Turbojets have largely been superseded by turbofans (or turboprops for low-speed flight).

Turbofan engines are inherently quieter than turbojets for a given level of thrust. A turbofan thrust is developed by turning a fan with a turbine engine that accelerates a larger amount of air to a lower velocity than do turbojets. Turbojet thrust is developed solely by the turbine engine.

: a jet engine designed to produce thrust principally by means of a propeller driven by a turbine with additional thrust usually obtained by the rearward discharge of hot exhaust gases.

Turboprops fill the efficiency gap between reciprocating and pure jet engines, being most efficient at mid altitudes and airspeeds. Still more expense and performance than most general aviation flights need though. It is all mission related.

Turboprop Advantages A turboprop engine is more lightweight than a jet, giving it better performance during takeoff. It runs more efficiently while providing a higher power output per unit of weight than a jet. Expect optimum fuel efficiency when flying at low altitudes (ideally below 25,000 feet).

Piston engines are much more efficient at their typical power outputs and are less expensive both to purchase and operate. Turboprops are generally considered more reliable, offer higher efficiencies for their higher power outputs, and can yield much improved performance at high altitudes.

Keep that in mind when looking at the numbers below.

• King Air B200. Beechcraft’s King Air B200 is their cheapest King Air in terms of operational costs.
• Quest Kodiak.
• Pilatus PC-12NG.
• Cessna 208B Grand Caravan.
• Socata TBM 900.

Turboprop vs Jet Safety Both turboprops and jets are powered by turbine engines, so they are essentially the same thing and thus, are considered to be equally as safe. Turboprops and jets are considered safer, and especially those with twin engines.

Tupolev TU-95. Used by the Russians as a strategic bomber, missile carrier and airborne surveillance platform, the Tupolev TU-95 Bear is the fastest turboprop airplane ever built. The airplane was built in various configurations, the fastest of which flew at 575 mph.

On 14 October 1947, US test pilot Chuck Yeager did what many thought was impossible. Strapped into the seat of the Bell X1 rocket plane – painfully so, having broken two ribs a few days before in a horse-riding accident – Yeager became the first man to fly faster than the speed of sound.

Tupolev Tu-114

The fastest German propeller driven aircraft that flew in WWII (but which did not see combat) was the twin-DB 603-powered Dornier Do 335 “Pfeil/Arrow” which had a claimed top speed of 474 mph (763 km/h).

Messerschmitt Me 163

Allison V-1710

For example, before the new system, the Army Air Force used the “P” designation, which stood for pursuit, on a wide variety of its fighter aircraft, like the P-51 Mustang, P-47 Thunderbolt and P-38 Lightning.

Fork-tailed devil

Developed for the United States Army Air Corps, the P-38 had distinctive twin booms and a central nacelle containing the cockpit and armament. Allied propaganda claimed it had been nicknamed the fork-tailed devil (German: der Gabelschwanz-Teufel) by the Luftwaffe and “two planes, one pilot” by the Japanese.

P-38, also called Lightning, fighter and fighter-bomber employed by the U.S. Army Air Forces during World War II. A large and powerful aircraft, it served as a bomber escort, a tactical bomber, and a photo-reconnaissance platform.

Pursuit

Lockheed Corporation

713 km/h

The Lockheed P-38 Lighting is an American two-engine fighter used by the United States Army Air Forces and other Allied air forces during World War II. Of the 10,037 planes built, 26 survive today, 22 of which are located in the United States, and 10 of which are airworthy.

which country had the best fighter planes of WWII

• Japan. 1.52%
• Italy. 0.71%
• France. 0.30%
• Great Britain. 102. 10.36%
• USA. 50.86%
• Russia. 2.03%
• Germany. 330. 33.50%
• China. 0.20%