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Atom 500 Compass Atom 500 Model Helicopter Discussion


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Old 07-15-2012, 09:53 AM   #1
sly the dogman
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Default 451 for a 251

Did not do my homework well enough, I bought a Futaba BLS 451 taking it for a tail servo which it is not. I mistakened it for the 251. Will this servo be adequat for the tail of a stretched Atom, hoping it will. Must say that I don't likely trust the 8900 anymore.
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Old 07-16-2012, 03:18 AM   #2
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I use a 451 on the tail of my scale Seahawk 600 - it has heaps of torque and works fine for my application (and runs on 6.5V - 2s A123).

I don't know how it would go on a full 3D heli though as it is a bit slower than many current tail servos, but not much - an Align DS520 is 0.09 at 4.8V and a 451 is 0.10 at 6V.

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Old 07-16-2012, 08:24 AM   #3
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why don't you trust the 8900 anymore?
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Old 07-16-2012, 08:54 AM   #4
sly the dogman
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These days the 8900 comes down very hot, even with a step-down. Lowered 6 to 5V,
its a bit better.

And I don't fly hard 3D more like "tourism".

Thanks for the info.
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Old 07-19-2012, 10:40 PM   #5
belcom
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Quote:
Originally Posted by sly the dogman View Post
These days the 8900 comes down very hot, even with a step-down. Lowered 6 to 5V,
its a bit better.

And I don't fly hard 3D more like "tourism".

Thanks for the info.
I know you've probably checked but could be something binding or tail grip thrust bearings reversed. A tail servo doesn't get hot for no reason. 8900 is plenty for the Atom.
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Old 07-20-2012, 10:06 AM   #6
sly the dogman
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Tail grips have been opened up and thoroughly checked and greased, tail rod is free, limits have been set on the tail pitch slider...
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