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What type of aircraft propulsion is the most efficient?
Now researchers at MIT have run their own experiments and found that ionic thrusters may be a far more efficient source of propulsion than conventional jet engines. In their experiments, they found that ionic wind produces 110 newtons of thrust per kilowatt, compared with a jet engine’s 2 newtons per kilowatt.
Why are planes more efficient at high altitudes?
Jet engines work more efficiently at high altitude because the air is cooler. Hence, the larger the expansion of the air when heated, the faster the aircraft moves because it is the expansion of air that drives the turbines of the jet engine which generates more power for lesser fuel burn.
Why reciprocating IC engine are not suitable for flight at high subsonic speeds at high altitudes?
The turbine engine’s higher fuel consumption, 1.5 to 2 times that of the reciprocating engine, is not a disadvantage for most aircraft applications because of the higher specific power. As density drops off at higher altitudes, the machine ingests less air mass, resulting in reduced power and reduced thrust.
What are 3 types of propulsion systems?
Different propulsion systems generate thrust in slightly different ways. We will discuss four principal propulsion systems: the propeller, the turbine (or jet) engine, the ramjet, and the rocket.
What is the fastest form of propulsion?
Probably the fastest propulsion system scientists could build right now, external pulsed plasma propulsion would explode hundreds of nuclear weapons behind a spacecraft. The ship would ride in front of the shock waves. The idea was first studied in the late 1940s, and, technically, it could work.
Do planes go faster higher up?
The higher the better One of the central reasons behind aircraft altitude is that, as the air gets thinner with every foot climbed, planes can travel more easily and therefore move faster and burn less fuel, saving money.
How do pilots conserve fuel?
To reduce fuel without compromising safety, pilots can avoid over-fueling, adjust speed and altitude, and shut down extra engines while taxiing.
Why do subsonic aircrafts have inlets with thick lip?
A subsonic aircraft has an inlet with a relatively thick lip. An inlet for a supersonic aircraft, on the other hand, has a relatively sharp lip. The inlet lip is sharpened to minimize the performance losses from shock waves that occur during supersonic flight.
Why do ships use 2 stroke engines?
When a ship is being constructed in a shipyard, the most important machinery that is to be selected is the main propulsion machinery. A two-stroke engine can burn low-grade fuel oil and hence reduce the running cost of the ship.