PPRuNe Forums - View Single Post - Explain lead-lag in a rigid rotor to me?
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Old 2nd Feb 2007, 19:15
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RVDT
 
Join Date: Nov 2006
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Pretty close but you left out the spherical elastomeric bearing which is hiding in the fat bit of the star near the centre, where the sleeves (read grips if you want) attach and also another bearing inside the "Frequency adapter".

Later on they figured you didn't need a star at all and you can see the elastomeric bearing better. The round black bit. The grey bit with the blue tape around replaces the green block on UL's pic for L/L damping.



And this definitely is rigid but everything happens in the blade except pitching.



And this one is "bearingless" (well nearly anyway)




And then the Flintstones got involved:

Couple of big lumps of carbon fibre! Actually hand laid in a plywood box - have seen it done. Cutting and curing the carbon was a little more high tech though.




And if you watch this lot getting to this point, you would never get in a helicopter again! Looks about as complicated as it could get.



Slow and Adam, try getting hold of an AS350 Maintenance Training manual. It explains it all very well.
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