Trex 450s tail fails forced to invert auto vid
03-08-2011, 02:31 PM
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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
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
03-08-2011, 09:43 PM
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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
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
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
03-08-2011, 11:52 PM
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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
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
