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Fast Lad Performance . Ace Hobby . Esprit Model

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Thunder Tiger Raptors 30-90 - Imperio > RAPTOR 50 Which feathering bearings usually go bad in a crash?
 
 
Thumpernator
Senior Heliman
Location: Senoia, Georgia, USA

My Posts This: Topic  Forum
Crashed my Raptor 50 Titan last Sunday, knife-edged in with 2000 head speed. Feathering shaft looked like one of those "curvy road ahead" signs. Pictures are in the Crashed Forum.

Anyway, during the rebuild I installed new grips, head, feathering shaft, and dampers. The bearings felt good when rotating them by hand and the thrust bearings felt good when compressing them by hand and rotating.

But with everything installed and tightened down, both grips are "notchy" when turning them. I've ordered all six bearings, but was wondering which of these bearings typically cause this after crashing? My train of thought is that the outer bearings took such a side load that they were damaged. But you can't tell this when inspecting them.

BTW, yes I installed the thrust bearings correctly and all washers as per the manual, just like it was before the crash.

Dave
Crashing is not authorized.
10-31-2009 12:09 AM
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BarracudaHockey
rrMaster
Location: Orange Park FL

My Posts This: Topic  Forum
"if" you installed all the washers the thrust bearings are probably whats causing it.

Take each radial bearing, put a feathering shaft in it and put some side force on the ID of the bearing and turn it, you'll feel them if they are gritty.


AMA 77227
http://www.jaxrc.com
10-31-2009 09:34 PM
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Thumpernator
Senior Heliman
Location: Senoia, Georgia, USA

My Posts This: Topic  Forum
Thanks, BH. I was hoping you would 'chime' in.

Dave
Crashing is not authorized.
11-01-2009 01:29 AM
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Thumpernator
Senior Heliman
Location: Senoia, Georgia, USA

My Posts This: Topic  Forum
Follow Up

Checked the bearings like BH suggested and two of the regular bearings had some roughness. Long story short, I tried all combinations and it turns out that all four regular bearings and both thrust bearings were bad.

She's ready to fly again, and this time with a set of Mav. G5 Wide Chord blades.

Dave
Crashing is not authorized.
11-03-2009 03:04 AM
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Thunder Power RC . Mikado Modellhubschrauber . Futaba-RC

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Thunder Tiger Raptors 30-90 - Imperio > RAPTOR 50 Which feathering bearings usually go bad in a crash?
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