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Old Dec 06, 2012, 04:46 AM
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Australia, VIC, Seaford
Joined Apr 2012
19 Posts
Help!
Toilet bowl effect

Hi all , I have a couple of x350a's . my first one has had many a learning experience , the new one comes out on calm days . Anyway I like to keep the first one going as a hack and after a good hit into , surprisingly enough a toilet block at my local park I've done an extensive rebuild , ( shafts and whole top end ) ever since though when hovering it seems to be suffering what ive heard refered to as the TBE seeming to want to move in a circle while the nose stays in the same orientation , sort of like a circular pendulum under the rotors . Has anyone had this happen to them and even better know where the problems coming from . Any help would be much appreciated . Thanks Shane.
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Old Dec 07, 2012, 01:15 PM
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United States, WI, Beloit
Joined Nov 2012
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Almost sounds like too much weight in the nose, combined
with a damaged gyro.

What does it do if you hold the tail steady with rudder input?
Or does it still spin, even with full opposite rudder?
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Old Dec 07, 2012, 01:53 PM
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Germantown, WI.
Joined Oct 2007
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TBE is caused by a harmonic distortion between the upper and lower rotor on a coax. It is usually related to worn or damaged linkage or anchor points for the blades or flybar, causing binding or excess slop. It can be a real pain in the ass to find, especially with poor quality materials.
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Old Dec 07, 2012, 02:36 PM
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Quote:
Originally Posted by Balr14 View Post
TBE is caused by a harmonic distortion between the upper and lower rotor on a coax. It is usually related to worn or damaged linkage or anchor points for the blades or flybar, causing binding or excess slop. It can be a real pain in the ass to find, especially with poor quality materials.
That's right.. come to think of it, my coax did that when it had a broken
flybar link.

At first glance, the link looked fine, but it had a crack on the very end
of the link, that would allow it to spread apart under load.

Not enough to make it pop off, it would stay attached just fine.
But it introduced enough slop to make it impossible to fly.
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Last edited by Steve_; Dec 07, 2012 at 03:32 PM.
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