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Glitch -o- rama

Old 02-08-2007, 06:56 AM
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nerv2112
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Default Glitch -o- rama

While attempting a autorotation that turned into a uncontrolled crash landing I bent my feathering shaft and tail boom. After replacing those when I start the engine all of my servos are freaking out randomly. Everything is fine before I start it. Anyone on here have a similar problem after a hard landing? This heli flew awesome before I messed it up. Could my rx or crystal be fried?

specs:
tx - Futaba 6EXH
rx - R168DF
servos - all S3151 except a 9254 for the tail
Gyro - gy401
Wallet - empty

Old 02-08-2007, 11:23 AM
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Default RE: Glitch -o- rama

Check all of your electrical connections and that your crystal is fully seated.
Old 02-08-2007, 11:37 AM
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Default RE: Glitch -o- rama

You did tape your crystal down and do a voltage check before take-off right?
Old 02-09-2007, 12:40 AM
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Default RE: Glitch -o- rama

Thanks for the suggestions but im still having trouble..

I replaced the rx and crystal today but when I do a vibration test using a dremel as described in another thread I can still get it to glitch around the main shaft. I diddnt know about taping down the crystal it has a plastic cover in the rx but I have it wrapped in foam and have it velcroed down same with the battery. I do have a voltage meter on the model indicating the battery is at least holding a charge.

Added some pics of the crash damage. Feathering shaft took the brunt of it looks like the blades only have a small nick in one.
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Old 02-09-2007, 07:15 AM
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Default RE: Glitch -o- rama

You have something loose somewhere. Look for metal to metal check every bolt, screw, nut.

Edit: I have had a bad receiver before.
Old 02-09-2007, 07:32 AM
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Default RE: Glitch -o- rama


ORIGINAL: DebianDog

You have something loose somewhere. Look for metal to metal check every bolt, screw, nut.

Edit: I have had a bad receiver before.
Yea I bet you are right. I have new bearings and mainshaft coming on Sat so im going to tear the thing down and rebuild it from the ground up if thats what it takes. You glitches will not break me! [sm=punching.gif]
Old 02-09-2007, 02:51 PM
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Default RE: Glitch -o- rama

Also check to make sure the screw that attaches the right tail boom support strut to the horizontal fin mount does not extend into the guide hole for the tail rotor control rod. This would cause the STEEL rod to vibrate against the STEEL screw tip and cause RF noise glitching.

Ditto for bad/rusted rear engine bearings
Old 02-10-2007, 07:17 AM
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Default RE: Glitch -o- rama

ORIGINAL: syclic

Also check to make sure the screw that attaches the right tail boom support strut to the horizontal fin mount does not extend into the guide hole for the tail rotor control rod. This would cause the STEEL rod to vibrate against the STEEL screw tip and cause RF noise glitching.

Ditto for bad/rusted rear engine bearings
I am going through the whole thing looking for loose/misssing screws. Do you know if there is supposed to be one here? I cant find an exploded view that goes far enough to tell. If so this might be where the problem is.

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Old 02-10-2007, 07:25 PM
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Default RE: Glitch -o- rama

As far as I know, that hole has something to do with adding cyclic response time or something to that effect, it explained it in the manual anyways.
Old 02-11-2007, 04:24 AM
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Default RE: Glitch -o- rama


ORIGINAL: nerv2112

it looks like the blades only have a small nick in one.

If you haven't already, ditch the crashed blades, and fit a new set.

they might "look" alright, but this could be a source of vibration

Iain.
Old 02-14-2007, 10:11 AM
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Default RE: Glitch -o- rama

ORIGINAL: irc


ORIGINAL: nerv2112

it looks like the blades only have a small nick in one.

If you haven't already, ditch the crashed blades, and fit a new set.

they might "look" alright, but this could be a source of vibration

Iain.
Good advice.. I got it solved I think this is what I did

Went over the heli and retightened/threadlocked everything that needed it
Replaced the rx and crystal
Replaced main blades (upgraded to carbon)
Replaced tail boom and feathering shaft

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Old 02-14-2007, 10:26 AM
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Default RE: Glitch -o- rama

I hate maiden flights after fixing problems like that. Good luck she looks GOOD!

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