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General RC Heli Discussion Discuss general topics on rotary wing aircraft, including construction, Servo's, Gryo's and Stabilizer discussions.
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Topic Review (Newest First)
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| 09-20-2011 03:38 AM | |
| Rob |
Re: T-rex 600 Tail bobbing. the Bobbing is there weather im hovering or flying. Ill try diffrent headspeeds next time im out. thanks Rob |
| 09-20-2011 12:04 AM | |
| nairbg |
Re: T-rex 600 Tail bobbing. Try a couple of different throttle settings in your idle-up, like 60% or 70%. See if the bobbing frequency is related to head speed. If it's a head balance issue it will be related to a specific harmonic and should not persist at "other" head speeds (or the plane of the bob might shift from straight pitch). If it persists at various head speeds I'd suspect a control issue... servos or maybe even swash bearings. This might sound trite, but check that your mixes are clear. Does the bobbing persist in translational flight, or is it just in hover. |
| 09-19-2011 11:53 AM | |
| Perry3182 |
Re: T-rex 600 Tail bobbing. I'm not sure how finnincky the 750 is but I had a 780 that I never did get to work on a trex 500tt. I could however get it working on a hk450 belt drive. It bobbed more than it wagged all though there was some side to side movement with it as well. |
| 09-19-2011 11:47 AM | |
| Rob |
Re: T-rex 600 Tail bobbing. I have tried the orignal set of dampners and the kds green ones aswell. I have the gp 750. The tail isnt wagging from side to side just up and down. was going to try it but looks like rain here maybe later today if the rain stops. thanks |
| 09-19-2011 10:22 AM | |
| Perry3182 |
Re: T-rex 600 Tail bobbing. What kind of gyro do you have on there? If it's a gp780 and you switched to a torque tube that could be your problem. 780's hate any vibration. As well did you change your dampeners? |
| 09-19-2011 07:15 AM | |
| Rob |
Re: T-rex 600 Tail bobbing. I had a look at the servos and links and every thing seems ok. I did spin the the head with out the blades on it and I thought I felt a slight widdlt on the tail boom. I took the boom off and spun the head useing a cordless drill on the torque tube. I think but dont quote me on it that i have a slightly out torque tube. I now have 2 bearing in the tube and feels better by hand but the only way to tell if its fixed is fly it. Ill let you know later today. |
| 09-19-2011 07:06 AM | |
| craneman32 |
Re: T-rex 600 Tail bobbing. worn servo! Could be. Being that everything else is new it could be the servo. Everything is spinning way to fast for it to be a slow bobble. If it was shafts, bearings or moving parts it would be a fast vibration would it not? |
| 09-19-2011 02:02 AM | |
| Philip Shaw |
Re: T-rex 600 Tail bobbing. Wow the servo could do that for sure , my 500 trex was doing that very badly way worse then the guys video i took his addvice and it stoped maybe a worn servo is hunting for centre and is making it bob i am not really sure but thanx !!!!!!!!!!!!!!!!!!!! |
| 09-18-2011 11:01 PM | |
| blue_smoker |
Re: T-rex 600 Tail bobbing. I have the exact problem with my 500 clone. I know for sure it's my elevator servo, has some play in the gears, just waiting for servos in the mail. it's annoying for now. hope this helps. |
| 09-18-2011 10:18 PM | |
| bensidus197217 |
Re: T-rex 600 Tail bobbing. That sounds like a possibility let us know. |
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