wolfdad
12-14-2006, 11:45 AM
Ok, for some time now, I have been playing around with a Bergen turbine outfitted with an OF 4 blade head, Helitronix mixer, GY601 gyro, G3 receiver and all JR 8611 servos. Everything works beautifully as a unit and I have about 13 flights on her.
I have encountered one problem and it is driving me absolutely up the wall. Whenever a tail rotor or yaw input is made, the aircraft responds immediately, however the tail "hunts" or wags as it comes back to center. During the early flights, this was very un-nerving and, even now, it feels as if the tail wants to constantly let go. As I said, I am running a 601/9251 combination purchased new. Gain on the display is set, per JK, at 39 with limits at 110% and even on both sides. I had started out with the gain at 65 and, since the symptoms I am seeing indicate a gain problem, I have upped it all the way to 90 (transmitter only...have not messed with the 601 itself)with no appreciable change. Head speed is approximately 1250 to 1300 with Vblade 710's on the head and Vario 156mm tail rotor blades. This is no longer an issue of "are the tail rotor blades too small to counter the torque?" It is now me trying to solve this issue. I have made some incremental and small head speed changes with no difference. As I come out of a turn, it just feels like the aircraft is not going to steady up on the gyro and makes several passes over the hold heading. I can find absolutely nothing electrical or metal to metal that could be affecting the operation, so I figured that, after a year of playing around with this issue, maybe somebody has experienced the same thing.
Should anyone find that I left a parameter out or have a question, drop me a PM. I think I covered most of the bases, however I am sure that there is probably some small bit of info that I left out.
Ok, and help me out here.....no responses that my flying sucks....already know that and usually find something to blame it on, but not this time....this is a real issue.
Doc
I have encountered one problem and it is driving me absolutely up the wall. Whenever a tail rotor or yaw input is made, the aircraft responds immediately, however the tail "hunts" or wags as it comes back to center. During the early flights, this was very un-nerving and, even now, it feels as if the tail wants to constantly let go. As I said, I am running a 601/9251 combination purchased new. Gain on the display is set, per JK, at 39 with limits at 110% and even on both sides. I had started out with the gain at 65 and, since the symptoms I am seeing indicate a gain problem, I have upped it all the way to 90 (transmitter only...have not messed with the 601 itself)with no appreciable change. Head speed is approximately 1250 to 1300 with Vblade 710's on the head and Vario 156mm tail rotor blades. This is no longer an issue of "are the tail rotor blades too small to counter the torque?" It is now me trying to solve this issue. I have made some incremental and small head speed changes with no difference. As I come out of a turn, it just feels like the aircraft is not going to steady up on the gyro and makes several passes over the hold heading. I can find absolutely nothing electrical or metal to metal that could be affecting the operation, so I figured that, after a year of playing around with this issue, maybe somebody has experienced the same thing.
Should anyone find that I left a parameter out or have a question, drop me a PM. I think I covered most of the bases, however I am sure that there is probably some small bit of info that I left out.
Ok, and help me out here.....no responses that my flying sucks....already know that and usually find something to blame it on, but not this time....this is a real issue.
Doc