Almost the same as the other similar aircraft engines. And depends on the size of the helicopter, consequently to the power of the engine.
He didn't have or build an actual helicopter. It was just a sketch.
It depends on model.
$2
1,000,000.00
The cost to obtain a helicopter license varies between locations, type of helicopter used, and prior training. The basic answer would be around $15,000.
£57,000,000 inc tax
In the area of $100,000, 000.
It cost about 14 million to 16million dollars U.S.
No, diesel engines cost more to build than petrol engines. They are built much heavier.
Can be over 2 million dollars
If you have to ask it's too much
Even a cheap civilian helicopter is well over 3 million dollars