Double Horse tail rotor gear

magyarbacsi · Extreme 3D Joined: 04 Aug 2011 Posts: 99 Location: seattle

Double Horse 9104 and 9060 use the same gear in the tail rotor assembly. For all I know, all DH models that use that drive system do. I recently lost tail control of the 9104 that at first thought was the control board. The copter kept spinning in air. I found that the teeth on the tail rotor gear was ground off and did not spin fast enough to maintain control. The rotor did spin, but under load it obviously did not have the torque. No doubt when the copter made a few uncontrolled landings and the tail rotor jammed, the gear on the motor kept turning. I could not locate just the gear, a simple item that is probably <$1. You have to buy the taiol boom just to get the gear. No problem as I now have a spare motor.

I did in the meantime come up with a temp. fix. I slipped a small diameter fuel tube over the motor gear. On a small lathe, rounded the rest of the teeth off the gear and turned the diameter down just the size needed to cause enough friction between the motor gear and the now smoothed face gear to turn the rotor. It has worked for many flights and is still that way. I will wait for it to see how long it will take to fail before I change the gear. It is quiter too.

Any body have some contact with the DH company and see if replacement gears are available? ( Hello Platinum) May have to buy in quantity?
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KCF

platinum · Posted: Fri Aug 12, 2011 5:37 am Post subject: Re: Double Horse tail rotor gear

Calineil · Posted: Sat Jan 21, 2012 5:36 am Post subject:

Hey Platinum, just a quick check on that tail mod pic, which Walkera model of tail unit have you used and does it fly well now ? Looks like a MUCH stronger tail unit.

I bought an Esky Honey Bee CP3 motor unit but it's too damned big to fit into the motor housing and the tail unit from the CP3 is too thin to fit to the tail boom of the DH9104.

ALL help would be GREATLY appreciated.

Neil
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Calineil
Hover,hover, then hover some more Wink

cadrobbi · Charging Joined: 04 Apr 2012 Posts: 1

Calineil · Posted: Wed Apr 04, 2012 4:29 am Post subject: Hi cabrobbi

I ended up giving up on the DH and went and bought a Belt CP V2 which I'm now loving getting to grips with and hovering more and higher outside. I tried changing the tail unit over but the CP3 unit I couldn't get to fit at all in the end. Sorry. I hope you can sort out your spinning issues soon too.
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Calineil
Hover,hover, then hover some more Wink