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HelicopterMiniature Aircraft Whiplash & Fury 55 › Tail problem with my Fury
09-03-2003 04:38 AM  14 years agoPost 1
lfalsetto

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COLORADO

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I have a Fury with a Futaba 501 and a 9253. On occasions when I do a stall turn the tail will just stay there and all of a sudden then spin. Is this a servo problem or a gyro problem. It is almost as if there is a delay in. On the ground everything is fine. I am stumped. Should I change servo's.

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09-03-2003 04:48 AM  14 years agoPost 2
Dura-Ace

rrApprentice

Kansas

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I have had two 9253's go out on me. One had 125 flights and the other had 50 flights. The good news is futaba covered them under warranty. Sounds like the same problem I had. Change the servo and see if it clears up the problem. These Gyros are bullet proof. I had one crash dead on the nose from 300 feet and the gyro survived. Everything else broke but the gyro.

Nick

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09-03-2003 09:00 AM  14 years agoPost 3
Minor Problem

rrApprentice

Isle of Wight, UK

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I'd have a look at the amount of friction in your tail linkages, the 9253 is a very low torque servo and like a smooth and free linkage set up. If your ball links are a little tight it could stall the servo momentarily and give the symtoms you have described. Worth a check anyway to get everything as smooth as possible.

MP

James Bond doesn't have to put up with this sort of sh*t...

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09-03-2003 02:00 PM  14 years agoPost 4
Chopper

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Stow,Oh- oops, I mean St Louis, nope Stow again,

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I don't think your links are the problem. Your servo is bad OR your transmitter stick could be bad. Sometimes the wire to the stick will fatigue and break. I have had this happen three times in the last ten years.

You could also be going into lockout. Adjust your throttle to go to idle in failsafe so that you can tell if you are in lockout.

Play with this thing on the bench for an hour or so. If it is a servo or transmitter problem, it will probably show up.

Look carefuly at the wire to the servo. They can rub on the frame and short.

Paul Soha

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09-03-2003 03:09 PM  14 years agoPost 5
lfalsetto

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COLORADO

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I thought it was a wire in teh transmitter also, so we hooked up another 9z as a buddy box and it still did the same thing, Only the tail would not work could this still be alock out? when I got home everything is fine on the bench. Really nerve racking.

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09-03-2003 04:10 PM  14 years agoPost 6
Minor Problem

rrApprentice

Isle of Wight, UK

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It does sound like a servo fault, pull the plug and try another on the bench and see what happens. If all ok go for a repair or new unit.

MP

James Bond doesn't have to put up with this sort of sh*t...

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09-03-2003 09:32 PM  14 years agoPost 7
lfalsetto

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COLORADO

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Sometimes I have to be hit in the head with a 2x4, I noticed that the two bolts that hold the gear to the main frame keep comming loose. I wonder if this could be causing a lock out? Is this possible. Because it seems to be intermittent and that could be when I tighten up those bolts. Any idea on how to keep them tight>

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09-04-2003 08:29 AM  14 years agoPost 8
Minor Problem

rrApprentice

Isle of Wight, UK

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If you get a lock out it will stop all servos from working, not just one.

Which gear and bolts are you talking about? A couple of bolts rattling about could cause some rf interference I guess but I wouldn't have thought it was enough to cause our symtoms, i'd still try a servo replacement and try it on the ground.

Do we take it that you are using a PCM Rx?

MP

James Bond doesn't have to put up with this sort of sh*t...

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09-04-2003 10:13 AM  14 years agoPost 9
r2160

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Sydney,Australia

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I am pretty sure that the 501 gyros had a problem that occasionally they will lockout when doing a stall turn.

That is the only time you are having problems isnt it?

The fix?

I dont believe that there is one, however, I was told that was one of the reasons that futaba released the 502.

Glenn

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09-04-2003 10:31 AM  14 years agoPost 10
Minor Problem

rrApprentice

Isle of Wight, UK

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I have never had or heard of that issue with the 501. The only problem I am aware if is the piro rate is not as consistant as the later gyros. I'd still investigate the servo!

MP

James Bond doesn't have to put up with this sort of sh*t...

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09-04-2003 03:00 PM  14 years agoPost 11
lfalsetto

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COLORADO

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The bolts that I am talking about that keep comming loose are the two bolts on the side of the frame where the skid plate attaches, in front.

I am scheptical about the gyro it only does this on stall turns and once on a regular turn. Makes for a great looking tail slide, both the heli and my body english.

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HelicopterMiniature Aircraft Whiplash & Fury 55 › Tail problem with my Fury
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