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Model Forum / Radio Controlled / Helicopters / October 2008Blade CP Sudden Glitch
I had a "small drop" from around 4 feet and now the heli is glitchy - I will be hovering and all of a sudden it will fly off in one direction suddenly. I have tried the normal setup and balancing checks, is it possible the 3 in 1 is damaged? Any help would be appreciated. >I had a "small drop" from around 4 feet and now the heli is glitchy - I will >be hovering and all of a sudden it will fly off in one direction suddenly. I >have tried the normal setup and balancing checks, is it possible the 3 in 1 >is damaged? It is possible. Another option could be a broken servo gear. Did you test them properly after your incident?  SignatureRoRo I ran the heli up on the bench at different throttle settings to make sure the servos were "stable" when there was no transmitter input and they appeared fine. >>I had a "small drop" from around 4 feet and now the heli is glitchy - I >>will [quoted text clipped - 6 lines] > It is possible. Another option could be a broken servo gear. Did you > test them properly after your incident? > I ran the heli up on the bench at different throttle settings to make > sure the servos were "stable" when there was no transmitter input and > they appeared fine. No, that's not the right way to check a servo but that will check for interference from the motor and speedo. To check a servo: Move each of them slowly across the whole range of motion and make sure they move smoothly as they do with no jumps or hesitation or binding. Then place your finger on top of the servo's output arm and press down gently to give some drag as you move , the servo should still be able to move with no jumping or skipping. A third good check is with the radio and heli switched on try to gently rotate the servo's arm by hand at various points in its movement; if the arm moves and there is no resistance then there is a broken gear inside the servo. N.B. Do all this with the main motor unplugged or out of mesh so that in the event of a radio glitch the heli doesn't spin-up in your face. SignatureChris Thanks for the tips - I did this and the servos appear to be fine. I found a 3 in 1 online and ordered it, hopefully that will correct the problem. >> I ran the heli up on the bench at different throttle settings to make >> sure the servos were "stable" when there was no transmitter input and [quoted text clipped - 17 lines] > N.B. Do all this with the main motor unplugged or out of mesh so that in > the event of a radio glitch the heli doesn't spin-up in your face. It's also possible that you have a mechanical problem with the head assembly, since you had a hard landing. Very slight problems with binding can cause cause your symptoms. > Thanks for the tips - I did this and the servos appear to be fine. I found > a 3 in 1 online and ordered it, hopefully that will correct the problem. [quoted text clipped - 20 lines] >> N.B. Do all this with the main motor unplugged or out of mesh so that in >> the event of a radio glitch the heli doesn't spin-up in your face. You are right - one of the ball linkages attached to the flybar was stuck, once I fixed it we were back to normal. Now what to do with an extra 3 in 1.....Thanks for the help, guys.. > It's also possible that you have a mechanical problem with the head > assembly, since you had a hard landing. Very slight problems with binding [quoted text clipped - 25 lines] >>> N.B. Do all this with the main motor unplugged or out of mesh so that in >>> the event of a radio glitch the heli doesn't spin-up in your face. Don't worry, you may need it! The motors have been known to fail, and take the 3&1 down. I managed blow a 3&1 in a clumsy accident. (Motors survived, 3&1 didn't.) Possibly a useful link. http://www.bladecprepair.com/index.html > You are right - one of the ball linkages attached to the flybar was stuck, > once I fixed it we were back to normal. Now what to do with an extra 3 in [quoted text clipped - 31 lines] >>>> in >>>> the event of a radio glitch the heli doesn't spin-up in your face. |
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