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Futaba-RC . A Main Hobbies . Boca Bearings

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HIROBO Freya - Sceadu - Shuttle > Freya aluminum TR pushrod breaking.
 
 
dkshema
rrProfessor
Location: Cedar Rapids, IA

My Freya has developed a strange appetite for tail rotor push rods.

I've been flying this bird since I built it in 2004. Never had a problem with the tail rotor push rod. This sprin, after I got back out to the field to fly, the tail rotor pushrod broke in flight. It broke at the front end, about three inches away from the servo arm.


The break was nice and clean, the aluminum tube almost looked as if it had been cut using a sharp pipe cutter.

I replaced the pushrod with a new one (PN 0414-136). Less than a dozen flights later, the new one broke in exactly the same manner, in flight, and nearly in the same place.

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Is this a common occurrence with the Freya, and if so, is there a solution that fixed the problem once and for all?

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* Making the World a Better Place -- One Helicopter at a time! *

Dave
06-01-2008 04:16 AM
 
 
TMoore
rrProfessor
Location: Cookeville, TN

Most likely a high frequency vibration is killing the pushrods. It might be a good idea to find it.

TM

"If you can do it, it ain’t bragging." - Will Rogers
06-01-2008 04:32 AM
 
 
dkshema
rrProfessor
Location: Cedar Rapids, IA

I did recently have to replace the rear bearing, piston and ring in the motor. Guess I'll have to yank the motor and make sure I got the clutch stuff on straight and centered. Time to find that dial indicator in my shop...

Thanks Terry.

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* Making the World a Better Place -- One Helicopter at a time! *

Dave
06-01-2008 06:46 AM
 
 
Learn to Fly
Key Veteran
Location: Yalesville Connecticut

Are you using the shrink wrap?

I switched mine out to a carbon rod, and have had no issues since. I too snapped an aluminum rod(without shrink wrap) I use it on the carbon rod too. Central Hobbies makes a good kit.


Jeff
Believe nothing you hear, and half of what you see...
06-01-2008 12:18 PM
 
 
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Modefo's RC Helicopters . XHELI.COM . Autography FlightPower

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HIROBO Freya - Sceadu - Shuttle > Freya aluminum TR pushrod breaking.
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