Mast height?

AV8RDOUG

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Sep 11, 2019
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So, what are the pros/cons for a tall mast/rotor head vs. a much shorter one?.

I see the availability of longer blades (further from the tail and ground), but are there other benefits to a tall mast?

Thanks.
 

Jean Claude

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Better damping of oscillations, due to angular delay of the rotor when it is subjected to a given roll or pitch rate
 

jm-urbani

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Better damping of oscillations, due to angular delay of the rotor when it is subjected to a given roll or pitch rate
HI jc, do you mean the higher the better or the shorter the better ? (as for oscillation I means)
 

Jean Claude

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Jan 2, 2009
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Location
Centre FRANCE
Aircraft
I piloted gliders C800, Bijave, C 310, airplanes Piper J3 , PA 28, Jodel D117, DR 220, Cessna 150, C
Total Flight Time
About 500 h (FW + ultra light)
With the mast higher, the damping moment is greater.

Sans titre.png
 

Smack

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JM, I believe Jean will say that the "greater damping moment" means 'more stable', thus probably a bit less 'maneuverable'.
 
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