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servo gear replacement

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Old 02-14-2005, 05:28 PM
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aeroman
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Default servo gear replacement

Need some advice before I buy some sets of replacement gear for four HITEC HS81 servos. I plan to use them for a 3D plane, and I believe the nylon gears will not hold. The question is: is it a straight forward change? ( pull the nylon ones and insert the metal ones), or are there any differences between the two?
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Old 02-14-2005, 06:15 PM
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XJet
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Default RE: servo gear replacement

What size 3D plane are you contemplating?

Forget all about the HS81 (even with MGs) for a 40-sized bird and they'd probably be marginal even on a 25-sized one.

I like the HS81 and have never busted a tooth -- but I'd never dream of using them on anything much bigger than an 0.15-sized plane.

Before you fork out $$ on a metal gearset, check the price difference between an HS81 and HS81MG, last time I did it was less than the price of a set of metal gears so it might work out better to just buy some HS81MG servos and keep the nylon ones for throttle.
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Old 02-14-2005, 06:18 PM
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exeter_acres
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Default RE: servo gear replacement

Agreed....

Yes the gear switch is easy....

but I wouldn't use these servos on anything glow.....
save them for your electrics
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Old 02-15-2005, 08:43 AM
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aeroman
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Default RE: servo gear replacement

XJet, the HS81 are intended for use on a Mini 3D. I agree, I wouldnt use them for anything bigger than a .15, but the manufacturer recommends HS81.
I checked tower hobbies for the HS81MG and they have them for $ 23.99, the metal gears are $ 16.59 ea., which is not cheap either.
I´m still doing some math to see if i go for the cost of insurance
Thanks for the response, also to exceter -acres
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