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HomeAircraftHelicopterGasser Model RC HelicoptersOther › Tail servo acting erratically (9254)
10-14-2012 11:44 PM  5 years agoPost 1
flyinfriend

rrApprentice

North American continent

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Today I was flying my Predator and toward the end of the flight. the tail started making uncommanded changes. I hit throttle hold and piroed down.

I went over everything at the field checked the tail servo, held onto to it while moving the stick in normal gyro model to provide resistance and all seemed ok. I took it back up and while hovering it started piroing so again I hit TH and landed.

This time when I checked it over I found the servo would intermittently go to a spot and stop. It was as if all power just stopped. If I pushed the arm one way or the other it would come back to life,

Is this happening because the pot has gone bad? The servo is a 9254.

The gears are fine, no stripped gears.

Thanks

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10-15-2012 04:25 AM  5 years agoPost 2
rbort

rrProfessor

Franklin, MA - USA

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Yes Tom
The pot has gone bad on this servo and I've tried to say before to folks that the 9254 is NOT a good tail servo for gassers due to its high failure rate.

You were fortunate it didn't end up in a crash, would have cost you more than that servo is worth. My advice would be to buy a better servo and not use the 9254 any more in gassers, you've seen how it can fail now.

-=>Raja.

MA 1005 Hanson 280, 4210 flts
Spectra 27 3DMax, 3280 flts
Whiplash V1-2 Hanson 300, 1555 flts
Whiplash V2 Hanson 300, 393 flts

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10-15-2012 05:08 AM  5 years agoPost 3
kogibankole

rrKey Veteran

albuquerque/ibadan

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ive been using the jr 8900g without issue ever

if im not blade bogging youll find me pack puffing

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10-15-2012 08:20 AM  5 years agoPost 4
blade77

rrApprentice

N. Ireland

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rbort - What do you recommend for a good tail servo?

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10-15-2012 02:18 PM  5 years agoPost 5
rbort

rrProfessor

Franklin, MA - USA

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Servos
I'm a big fan of BLS servos, for the tail I'd use either a BLS251 or a BLS256HV.

-=>Raja.

MA 1005 Hanson 280, 4210 flts
Spectra 27 3DMax, 3280 flts
Whiplash V1-2 Hanson 300, 1555 flts
Whiplash V2 Hanson 300, 393 flts

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10-15-2012 03:27 PM  5 years agoPost 6
flyinfriend

rrApprentice

North American continent

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Thanks!

I have another 9254 that I will put on it for the short haul. I am thinking of getting the BLS254 which will work with my gy401. It is the same as the other BLS except it accepts the lower frame rate. I currently am using the BLS254 in my Spectra and it's working great.

Thanks again!

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10-21-2012 04:06 AM  5 years agoPost 7
geomecc

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Long Island ,NY

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i have had that servo do the same in my 50 size nitro. im partial to savox servos lately. so far no issues

R I P Roman Jr. Team SKOOKUM SRW EFC

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