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HelicopterMiniature Aircraft Whiplash & Fury 55 › Fai head-Mast Bumping??
12-09-2004 12:53 AM  13 years agoPost 1
tabbytabb

rrElite Veteran

seattle

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I was getting some mast bumping with my original setup on my Ion with FAI head and I attributed it to the rigid dampening I had in at the time.

Today I switched to the recommended setup (2 50D's and .25 shim) and it was better but I was still getting the occasional bump.

Any thoughts?

Thanks a bunch,

Here is my setup if it helps
Headspeed 1550
SAB 710s
Freya Paddles
negative 3.3 delta


Also when pulling on each blade grip should there be any end play? If I pull the grips away from each other I notice a small bit of back and forth play and was wondering if this is normal?

Thanks

Tabb

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12-09-2004 01:03 AM  13 years agoPost 2
Dr.Ben

rrMaster

Richmond, VA, USA

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Tabb,

The endplay is entirely normal. The first thing that I'd like you to try is another set of blades, just about anything you have or can borrow. Occassionally, the head will exhibit a particular dislike for a certain blade at a certain headspeed.

Get back to me on this before we pull our hair out chasing something simple.

Ben Minor

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12-09-2004 01:08 AM  13 years agoPost 3
tabbytabb

rrElite Veteran

seattle

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Ben,

I think you may be right. The bumping seems to go away a bit as the headspeed drops (voltage sags)

Perhaps the SAB's just arent jiving well with the current headspeed/dampeing setup.

I have some Gamma 700's but they are for a joker so wrong bolt size.

I will see what I can dig up

Tabb

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