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Old Nov 19, 2010, 09:07 AM
Bugman Jeff is offline
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Question

What do head dampers do?


I know, dampen the head I've been flying FP for awhile, but I'm pretty new to the CP's. As such, I've never had to work with head dampers before. I understand they're necessary, but I'm uncleas as to what exactly they do. What are they for? What happens when they wear out? What effect do stiffer or softer dampers have? What if you eliminated them with shims? Thanks for the info.
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Old Nov 19, 2010, 09:51 AM
Dusty1000 is offline
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Soft dampers make the cyclic feel soft, hard dampers make it feel hard

When they wear out, you just replace them.

Not sure what you mean by eliminating them with shims They're not only there for any side to side slop, but for the up and down slop too

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Old Nov 19, 2010, 10:13 AM
Martyn McKinney is offline
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Dampers help isolate the head and heli from each other and average out any instantaneous mechanical effects that occur during head rotation.

In most FP helis, damping is accomplished by means of the flexible blades.

In a CP heli, if there is insufficient damping (shims, dampers too hard, cold weather) even the dysymmetry from the blades passing over the canopy can interact with the fuselage and cause the tail to bob up and down.
Last edited by Martyn McKinney; Nov 19, 2010 at 10:19 AM.
Old Nov 19, 2010, 12:27 PM
shastamike is offline
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Do Walkera FP helis (V120D01 and V100D01) helis have head dampers?
Old Nov 19, 2010, 03:54 PM
potato42 is offline
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Quote:
Originally Posted by shastamike View Post
Do Walkera FP helis (V120D01 and V100D01) helis have head dampers?
The o rings installed on the feathering shaft act as a damper. I'm curious to try stiffer o rings or possibly a hard material to see what happens.


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