Recently started flying my second HBK2 using the same TX, just swapped crystals. Well I now have some sort of glitch in the main system. No glitch in the tail that I've noticed. I'll have it in a hover just a few inches off the ground and suddenly the servo(s) will jump. It happens real quick, and recovers just as quick. At first it was causing a quick jump to the right. Now it seems to be causing a quick reduction in pitch on all three, causing the heli to drop real quick. But it always recovers just as quick. It's like a quick couple inch drop, then just as fast a couple inch rise. Only pattern I've noticed is it only seems to happen with power applied and light on the skids. Sometimes it will happen in quick successions, and at times a minute or two apart. TX battery power still showing in green, although it's the last green before going yellow.

Any thoughts?

i had that problem using the same tx for 2 of my helis.. my problem was i wasnt getting good contact on the crystal. you have to make sure the drystal is in there real tight.. does this happen on both your helis?

Never happened on the other heli, just this one.

I just ran another battery and it didn't happen till near the end of the battery charge this time. Happened 3 times. Had it just a few inches off the ground. It slammed it down on it's skids then right back up. It's making me nervous!

I'll check the crystal and see.

Unplug the motor, turn on TX then plug in battery and watch the servos as you operate the sticks. See if any of the servos
jitter or stick. Move the sticks around quite a bit- hold different positions for a few seconds and see what the servos do.
It may be that one or more servos will "stick" and then release.
Don

Checked crystals, swapped TXers.....no change. But now I'm noticing I have multiple input problems on my "spare" heli.

1. As already mentioned, the uncommanded inputs.

2. Was having an extremely difficult time maintaining a heading with the spare. Had to use cyclic inputs to help compensate rudder movements. Happened to notice there was no twitching on the tail servo like my primary heli had (which indicates gyro input). Compared the two helis side-by-side (with motor disconnected). Sure enough, tail servo moved when turning the heli on the primary, but no movement at all on the spare.

3. A short time later, when to show my wife how the gyro wasn't working on the spare in comparison to my primary. As soon as contact was made between the battery and heli wires, the motor spun up! Douple-checked stick positions and idle switch.....they're good. Tried the other TX....same thing. ***?

I'm getting the feeling the RX on my spare has some major issues. Possible?

Edit: Just to clarify, the light on the gyro indicates it's working. It even centers the servo once initialized. Just doesn't work after that.

I've tried that. I'm not noticing any twitching on the ground, motor running or not.

Change the batterys in the Transmitter................. Then try again.............


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Of all the things I ever lost....................................... I miss my mind the most!

It does sound like you are having issues with the receiver. Have you played with the receiver antenna routing? If you have it routed next to your ESC or some other RF noise maker, you could be giving your reciever fits. ( I am assuming you unwrapped the receiver antenna and routed it through the hollow tube provided with the heli.)

Already tried then with the 2nd TX, which has a full charge.

I opted not to use the antenna tube. Instead I routed my antenna wire along the tail boom support tube, leaving about 5" hanging loosely. I have it this way on both helis. I would assume that's not the problem since the primary heli doesn't have any issues....but it's worth a try since it seams plausible.