Thread: Guessing Game Mk III : What Engineering Marvel is this.?

The Gyroscopic Principal, which allows it stable flight as it glides to the ground. The machine is the Gyrocopter.

Near enough.
I was after auto rotation.
I am a old gyrocopter pilot from way back.

Auto rotation of a spinning air foil only occurs with certain designs of air foil and only at a air flow angle of incidence of less than 2 degrees.
The idea of rotary wing flight came from a sycomore seed and without auto rotation helicopter flight would be deadly if the engine fails.
A helicopter with enough height can glide to a safe landing without the engine.

Provided it still has a Tail Rotor.

Its still your go R I need to sleep.

Don't need a tail rotor for autorotation as there is no drive and therefore no torque reaction though the air frame.
Gyrocopters have no tail rotor, only a rudder to steer and in a vertical decent don't even really need that just the same as the sycamore seed.

I realise I forfeited my go before, but I'm going to jump in anyway.

20170702_084450_LI.jpg

Have a crack at this one ladies and gents.
[edit] and why is it so 'different' to what has been 'normal' in this application ?

semisealed compressor?

Originally Posted by Ancient Mariner

semisealed compressor?

Of a type, but semi-hermetics have been around since Moses, this is different, very 'Jetsons'.