How fast do jet engines turn?

How many revolutions per minute does a jet engine turn?

Typical aircraft piston engines redline between 2000 and 2700 RPM. That’s about as fast as you can turn a prop before tip speeds become transonic and lots of thrust is lost.

What is the average speed of a jet engine?

The typical cruising airspeed for a long-distance commercial passenger aircraft is approximately 880–926 km/h (475–500 kn; 547–575 mph).

How many horsepower is a 747 engine?

The power per engine for the two aircraft is seen to be 14 984 horsepower and 1646 horsepower for the 747 and Super Constellation, respectively.

Characteristic Lockheed 1049G Boeing 747
Number of engines 4 4
Total cruise power, hp 6 585 59 934
Power per engine, hp 1 646 14 984
Dry engine weight, lb 3 675 8 600

What starts a jet engine spinning?

With a little push from the auxiliary power unit… The compressed air passes through a small turbine on the outside of the engine, causing it to spin. … Attached to the turbine is a shaft which is joined by gears to the main engine shaft, and that begins spinning as well.

How does a jet engine push?

In a reaction engine, expanding gases push hard against the front of the engine. The turbojet sucks in air and compresses or squeezes it. The gases flow through the turbine and make it spin. These gases bounce back and shoot out of the rear of the exhaust, pushing the plane forward.

IT IS INTERESTING:  How does a motor produce torque?

How much air does a jet engine use?

(In a typical jet engine, 100 pounds of air/sec is combined with only 2 pounds of fuel/sec. Most of the hot exhaust has come from the surrounding air.) Leaving the burner, the hot exhaust is passed through the turbine. The turbine works like a windmill.