That would probably be the Allison 250 series turboshaft engine.
There are many different helicopter engines, most of them now jets
One of the biggest contributing factors to a helicopter accident or crash is inclement weather and wind. Because of the size of a helicopter it can experience more turbulence than a plane. The second most common factor in helicopter accidents is malfunctioning instruments in the cockpit.
most look like a small jet engine
The Marines use many helicopters. Their most common helicopter is probably the AH-1 W Super Cobra
A helicopter with a jet engine. The engine is adapted to give power to a transmission, rather than thrust.
the engine
if the engine fails a good pilot can 'auto rotate' using the dead rotor to lower the helicopter
No, a helicopter cannot go at the speed of Mach 1.5. It is because, this kind of propulsion can only be achieved through a jet engine. A helicopter's engine cannot achieve that.
The Robinson 22 helicopter has a four cylinder pistol engine. The single-engine light utility helicopter was designed in 1973 and has been in production since 1979. The cost of one of these helicopters is about $270,000.
The Chinook helicopter is an American twin-engine helicopter. The helicopter is used by military forces. The Chinook helicopter is mainly used for troop transportation, artillery movement, and resupply on the battlefield.
You can't do that.
you turn off the engine