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HelicopterMain Discussion › 9254 tail servo fault
01-27-2007 08:52 PM  10 years agoPost 1
digger123

rrApprentice

suffolk .uk

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i have a 401 with 9254 and sometimes when i switch on the heli the tail servo does not work but if i touch the servo horn gently it comes to life.had no probs when its working in the air so far.i have looked inside and all looks well no slop on gears all clean etc anyone ever come across this, the servo is a year old.

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01-27-2007 08:56 PM  10 years agoPost 2
Barney

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Inverness Scotland

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Yep..sounds like it's time to get a new one.. If you do a search there are a lot of threads about 9254 problems + recommended setups with a 401 to help avoid premature failures

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01-27-2007 10:36 PM  10 years agoPost 3
BarracudaHockey

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Jacksonville FL

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Its talking to you, listen or it will cost you alot more than a servo.

Andy
AMA 77227
http://www.jaxrc.com

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01-27-2007 11:38 PM  10 years agoPost 4
rada70

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Westchester, NY

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The servo should last much longer than a year. If it's a rear mounted servo, it doesn't last as long. Change it though, and make sure there is no binding when you do the limits.

Just do it.

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01-28-2007 12:06 AM  10 years agoPost 5
jadams

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East coast USA

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Send it back to Hobby services, they just replaced my 9254 for free and it was over a year old.

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01-28-2007 12:25 AM  10 years agoPost 6
playfair

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Rochester, NY

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I had the EXACT same symptoms once, though I was first experiencing mysterious sudden piros prior to seeing it on the ground (consider yourself lucky). It ended up being the motor, where there were "dead spots" around the armature due to a worn brush or bad commutator.

If it's tail mounted, you're SOL, as service will likely say oil got in. At least that's what happened to me, even though there was very little oil inside.


The sky is our canvas

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01-28-2007 03:35 AM  10 years agoPost 7
951_Powerstroke

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Corona, Ca

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I had the same issue, Hobby Services concluded it to be an intermittin motor problem. Don't fly it, send it out to be repaired asap. As Barracuda previously stated "Its talking to you, listen or it will cost you a lot more than a servo."

Jay



Of coarse I know how to fly this thing, but if you see me running try to keep up!!

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01-28-2007 05:35 AM  10 years agoPost 8
rudyy

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E. Amherst, NY

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If it's a rear mounted servo, it doesn't last as long.
Does that imply all Evo50 will come down earlier than Raptor50?

If rear mounted servo really causes the oil sipping issue, then it is apparently a design fault. I guess Hirobo should abend it, and changes it back to front mount like the one in Shuttle.

Rudy

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01-28-2007 07:02 AM  10 years agoPost 9
DJDAZ

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Perth Western Australia

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I have a 9253 on my tailboom and it get's less crap on it than when it was at the base of the tail.

About 9mths old and no problems yet.

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01-28-2007 10:21 AM  10 years agoPost 10
digger123

rrApprentice

suffolk .uk

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i got a 401 and i read that you dont worry about setting the limits with it as it wont bind in the air. the servo is fitted on a titan at the base of the tail boom so it does get covered in oil.also i did not really set the limits with my 502 gyro as i thought it was much the same but will get it replaced and make sure there is no binding thanks for the help nothing worse then the tail letting go.

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01-28-2007 01:59 PM  10 years agoPost 11
BarracudaHockey

rrMaster

Jacksonville FL

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Too much gain, rear mounted and oil soaked, and improper tail linkage setup (slop or binding) and you probably wont have a 9254 for long, they are good servos but I dont think they are as tollerent as the 53's were.

Andy
AMA 77227
http://www.jaxrc.com

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01-28-2007 06:17 PM  10 years agoPost 12
Raptor3DPilot

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North Las Vegas, NV

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When I first built my Raptor 50 I had an issue with my 9254 after about 4 flights. I was hovering near the ground and it went into a fast piro... I just throttled down and it set down fine. Turned out I didn't read directions very well and I had been putting 6v directly into it. Got pretty lucky I'd say. I sent it back to Futaba and they sent me a new one. I put a VR on it and didn't have any problems with it since... well that is until my VR came unplugged in flight and well you can guess the rest! HA

Remember when flying inverted that down is up and up is EXPENSIVE!

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HelicopterMain Discussion › 9254 tail servo fault
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