What is the Jesus nut on a helicopter?
Jesus nut is a slang term for the main rotor retaining nut or mast nut, which holds the main rotor to the mast of some helicopters. The related slang term Jesus pin refers to the lock pin used to secure the retaining nut.
What does it mean when a helicopter rolls?
To tilt forward and back (pitch) or sideways (roll) requires that the controls alter the angle of attack of the main rotor blades cyclically during rotation, creating differing amounts of lift (force) at different points in the cycle.
What happens if helicopter engine stops?
If the helicopter engine stops, everything will go quiet in the cockpit, and the machine will yaw violently to one side. When this happens, the pilot needs to instantly lower the collective, taking the pitch off the rotor blades, and initiating a descent.
What is safer propeller or jet?
Turboprop vs Jet Safety The main difference is that turboprops have a propeller on the outside of the engine while jets have fan blades inside the engine housing. One area where turboprops might get the nod is on smaller runways. Turboprops and jets are considered safer, and especially those with twin engines.
How much does a turboprop engine cost?
New Single-Engine Turboprops have a list price between $2m to $5m. Pre-owned prices for turboprops aged between five and 10-years old can run from $1m to about $3.5m. For turboprops older than 30 years, airworthy models can be bought for under $500k.
What is the cheapest jet engine?
The cheapest private jet on the market is the small but mighty Cirrus Vision Jet at $1.96 million. The Vision Jet is the world’s first single-engine private jet, powered by a Williams International FJ33-5A turbofan engine that produces 1,800lbs of thrust.
Why are turboprop engines so expensive?
While it does take more equipment to overhaul a turbine (you need to be able to high speed balance parts) and there is more training involved, the cost problem is primarily the cost of the parts. P&W (and they are no different than RR) basically has huge margins on spare parts.
Why are turboprops so expensive?
As engines get larger and more powerful, piston engines get more expensive and complex because they are limited by engine knock.
How high can turboprops fly?
25,000-30,000 feet