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Re: tail wag and rescue to backwards on a Trex 450L
Posted: Mon 30. Mar 2015 20:36:31
by pabloK
Hi
Tail wag gone. Now is working correct.
But rescue (normal) continues bad, it goes backwards
any other suggestion?
Re: tail wag and rescue to backwards on a Trex 450L
Posted: Mon 30. Mar 2015 21:07:22
by ZeXx86
Hi,
great, thanks for info.
If it works backward always, you can check, if the swashplate is level when your collective pitch is at the highest position (full collective).
The best is to measure deviation with a cyclic leveler. Also you can make sure that CG is correct.
Re: tail wag and rescue to backwards on a Trex 450L
Posted: Tue 31. Mar 2015 0:29:57
by pabloK
before the flight I checked that, and did servo travel adjustments with a leveler at full collective and minimum collective. also at 50% it was correct.
When I land the heli and tried the rescue the swash goes backwards almost at full.
what do you mean about CG ?
Re: tail wag and rescue to backwards on a Trex 450L
Posted: Tue 31. Mar 2015 8:17:53
by ZeXx86
Thanks for the info.
CG - Center of Gravity.
It seems that piro optimization is really reversed. In this case it will affect flight performance too.
There are some videos:
https://youtu.be/lq6QN4rTQ8A?t=1269
https://www.youtube.com/watch?v=4J8BfRXPxu8
It is actually same parameter as in Microbeast:
https://www.youtube.com/watch?v=zZzZFpPFkew
Re: tail wag and rescue to backwards on a Trex 450L
Posted: Tue 31. Mar 2015 23:35:54
by pabloK
FLYING GREAT !
RECUE GREAT TOO !
THANK YOU !
Re: [SOLVED] tail wag and rescue to backwards on a Trex 450L
Posted: Thu 02. Apr 2015 16:53:23
by pabloK
Hi
I made another analisis with tail blade and the result attached.
can you help me to find the problem?
thanks
Re: [SOLVED] tail wag and rescue to backwards on a Trex 450L
Posted: Thu 02. Apr 2015 19:23:40
by ZeXx86
It seems that vibrations are coming from the tail (the highest spike).
Second, lower spike, is coming probably from the autorotation gear.
This level is very, very high, so I do not recommend to fly with it until resolved.
First from all, if spike is not that high without tail blades, then it is possible that they are unbalanced, or problem is even in tail grips or tail shaft. So I recommend to unmount these parts step by step and check always how it affect vibrations.
If you will notice big difference, then you probably found the problem.
Re: [SOLVED] tail wag and rescue to backwards on a Trex 450L
Posted: Fri 03. Apr 2015 23:39:50
by pabloK
Hi
I flew the heli with this graphs and for my, flyes Ok, i am not an expert, so maybe is not so good, but I do not know.
Rescue works great too....
the only thing that i need help is in the tail wag at idle up 2 that is 90% flat curve.
In normal and at 75% goes fine, but in 90% start to wag.
thank you
Re: [SOLVED] tail wag and rescue to backwards on a Trex 450L
Posted: Sat 04. Apr 2015 9:26:51
by ZeXx86
I am afraid, but with 90% vibrations are most probably even higher that it is in mechanical limits of the helicopter to work correctly.
These vibrations may even unscrew all screws, so you have to be very carefull with each flight.