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Trex 450s tail fails forced to invert auto vid

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Trex 450s tail fails forced to invert auto vid

Old 03-08-2011, 02:31 PM
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Default Trex 450s tail fails forced to invert auto vid

A nice morning flight ends in a crash. My tail somehow fails while Im inverted. I decide not to flip the heli over in case of miss orientation, so I decide to hit Throttle Hold and invert auto with a spinning tail. Damage was only a bent flybar. For some strange reason after bench testing, all electronics were fine, gyro, tail servo, and tail controls were all working. What I did find was the plastic tail rotor gear in the stock 450s tail assembly disintegrated. To fix I disassembled the tail assembly and pressed on a copterX 450 metal tail rotor gear I found at the bottom of a pile of spares.

http://www.youtube.com/watch?v=j-fS-2luKAY

While Im at it may as well post these two from the day before.

The drive end bearing in the stock 430L 3550KV failed after a few crashes. I dismantled the motor to replace the bearing and discovered it was not much use. For 1. I could not find a bearing and 2. The shaft was worn where the bearing seats. So I bought a no name brand 3680KV brushless motor off EBay for AUD$12.00. This flight is the 7th flight with this motor.

http://www.youtube.com/watch?v=LvnuBnMwO3M

http://www.youtube.com/watch?v=Eo1QjKMnWsA
Old 03-08-2011, 09:43 PM
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Default RE: Trex 450s tail fails forced to invert auto vid


ORIGINAL: MASJO

A nice morning flight ends in a crash. My tail somehow fails while Im inverted. I decide not to flip the heli over in case of miss orientation, so I decide to hit Throttle Hold and invert auto with a spinning tail. Damage was only a bent flybar. For some strange reason after bench testing, all electronics were fine, gyro, tail servo, and tail controls were all working. What I did find was the plastic tail rotor gear in the stock 450s tail assembly disintegrated. To fix I disassembled the tail assembly and pressed on a copterX 450 metal tail rotor gear I found at the bottom of a pile of spares.

http://www.youtube.com/watch?v=j-fS-2luKAY

While Im at it may as well post these two from the day before.

The drive end bearing in the stock 430L 3550KV failed after a few crashes. I dismantled the motor to replace the bearing and discovered it was not much use. For 1. I could not find a bearing and 2. The shaft was worn where the bearing seats. So I bought a no name brand 3680KV brushless motor off EBay for AUD$12.00. This flight is the 7th flight with this motor.

http://www.youtube.com/watch?v=LvnuBnMwO3M

http://www.youtube.com/watch?v=Eo1QjKMnWsA
Great save... and awesomeflying.. where do you fly? I'm in Sorrento...

i've only been flying the 450's since October 2010 so i am very much still learning...

A recent vid..http://www.youtube.com/watch?v=LCWlHJqiLmQ

and this is my heli collection http://74.50.85.67/RC/Helis/Helis.html


Old 03-08-2011, 11:26 PM
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Default RE: Trex 450s tail fails forced to invert auto vid

Awesome flying and inverted save with minimal dammage too, thats a plus, well done
Old 03-08-2011, 11:52 PM
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Default RE: Trex 450s tail fails forced to invert auto vid

I forgot to zoom in before filming, and changing venues during the day I had a stack of room so it was a shame most of the focal point was distant.

Not much of a flared auto, but hey under the circumstances with an out of control tail theres not much one can do except reduce the damage and it worked. When I hit the switch I had no energy in the main blades with the tail spinning like that, so my guess was to stop the head spinning before it hit the ground and just let dead weight take its toll. Basically there was no time to think.

I have never done inverted piros. This was something new for me so next time Im going to try these for real.

Rob2160 - im in beckenham




Old 03-09-2011, 08:20 AM
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Default RE: Trex 450s tail fails forced to invert auto vid

My blade 400 did the same thing one time.  Must be a lot of stress on that gear.

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