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Questions tagged [rotor-head]

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0
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0answers
89 views

Are there attempts at fly-by-wire servo flap controlled rotor?

Reading this question and then this document about servo flap controlled rotor I was wondering if there has been any attempt at building one fixed hub helicopter with twistable blades hosting at 75% ...
3
votes
1answer
176 views

How does the load transfer from a prop to the airframe?

I was just watching this video... Restoration and startup of a Wright 1820 Cyclone ...and it got me thinking: a propeller shoves back air, and this creates a forward force on the prop. The prop ...
3
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2answers
427 views

Why is this type of rotor hub so rare…?

I wonder why is this type of helicopter rotor hub so rare... It is a very simple construction, having no flap or lead-lag hinges. A universal, constant-speed joint leaves the rotor free to find his ...
12
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3answers
2k views

Would an aircraft with no ailerons, no elevators and no rudders be safely flyable?

With contrarotative propeller (or not, if twin engine), cyclic and collective blade control. Would such an aircraft be safely flyable, and how efficient would it be, assuming it can have perfectly ...
42
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6answers
17k views

Can a helicopter stand on the ground upside down on its rotor head?

From what I understand the rotor head needs to be strong enough to hold the craft weight hanging below it, and sounds pretty strong. The blades however look quite fragile (for a piece of metal). In ...
8
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8answers
5k views

Is it possible to design a helicopter with fixed rotor blades only (no blade angle/flap/pitch)?

I am not familiar with helicopter rotor design but I wonder if it is possible to build a working/flying helicopter with fixed rotors that cannot change the blade angle, flap, pitch or adjust blades ...
5
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1answer
179 views

what is the statistical risk of head rotor failure?

What are the chances of rotor failure? What percentage of crashes are related to a malfunction of the rotor head?
6
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1answer
1k views

What are the mechanisms fitted in the SA321G Super Frelon rotor head?

Past the cyclic-collective pitch control, I understand (maybe incorrectly) that additional mechanisms are required to prevent or limit vibrations and loads on the mast and the blades. Aerospatiale ...