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| [SOLVED] tail wag and rescue to backwards on a Trex 450L https://www.spirit-system.com/phpBB3/viewtopic.php?f=20&t=558 |
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| Author: | pabloK [ Mon 23. Mar 2015 1:17:49 ] |
| Post subject: | [SOLVED] tail wag and rescue to backwards on a Trex 450L |
Hi can you help on the gyro and others value in order to make tail wag dissapear. I get this tail wag in right turns and in high speed forward flight. all value are at defaults i tried gyro from 60 to 29 and the same issue The rescue (normal) get up and backwards. thanks |
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| Author: | ZeXx86 [ Mon 23. Mar 2015 17:01:00 ] |
| Post subject: | Re: tail wag and rescue to backwards on a Trex 450L |
Hi, you can try to check rudder neutral position, how it is configured right now? Also you can put ball link closer to the center on the servo horn. What is your current Piro Consistency and Rudder delay value? |
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| Author: | FrankFuss [ Mon 23. Mar 2015 19:39:10 ] |
| Post subject: | Re: tail wag and rescue to backwards on a Trex 450L |
ZeXx86 wrote: Also you can put ball link closer to the center on the servo horn. The Align 450L stock rudder servo ball link location is 10mm from center. This is too far out. Between 8mm and 7mm is better. At about 8mm I got Rudder end-points of Minimum limit: 94 and Maximum limit: 100. |
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| Author: | pabloK [ Mon 23. Mar 2015 20:34:44 ] |
| Post subject: | Re: tail wag and rescue to backwards on a Trex 450L |
you can try to check rudder neutral position, how it is configured right now? I dont undesrtand this question, what value do you refer? is neutral at 90 degrees! Also you can put ball link closer to the center on the servo horn. Ok What is your current Piro Consistency and Rudder delay value? rudder delay is 15 piro consistecy is 150 any other data? thanks |
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| Author: | ZeXx86 [ Mon 23. Mar 2015 20:38:01 ] |
| Post subject: | Re: tail wag and rescue to backwards on a Trex 450L |
I then recommend to also set Piro Consistency to 160, Rudder Delay to 8. What rudder servo do you use? |
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| Author: | pabloK [ Mon 23. Mar 2015 21:23:31 ] |
| Post subject: | Re: tail wag and rescue to backwards on a Trex 450L |
the one that comes with the kit. align DS525M Also, analizing vibration, I have high ones in all axis. this is common in this kind of 450L heli that is so powerfull? Its NEW, right out of the box and it is almost the 10 heli I assemble. What about the rescue that comes up and backwards? in the bench seems ok !!! |
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| Author: | ZeXx86 [ Mon 23. Mar 2015 22:20:38 ] |
| Post subject: | Re: tail wag and rescue to backwards on a Trex 450L |
Can you please post Graphs from vibration analysis? Especially Y - aileron axis. If there are really big vibrations it may cause bad perfomance of the helicopter generally including rescue. |
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| Author: | pabloK [ Tue 24. Mar 2015 0:14:57 ] | ||||
| Post subject: | Re: tail wag and rescue to backwards on a Trex 450L | ||||
all axes at 90 % throttle and NO BLADES at all in some points, graphs down to 45% aprox, but i cant reproduce again this. I tried several times and almost always vibrations at 70% i am using a foam pad from the TAROT ZYX-S2, maybe this is some problem too? thanks
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| Author: | pabloK [ Tue 24. Mar 2015 21:44:51 ] | ||||
| Post subject: | Re: tail wag and rescue to backwards on a Trex 450L | ||||
Hi I change the anti vibration foam pad for the spirit (the one that cames with the second unit I bought recently, the first unit doesnt come with it) Please, see the new graphs for 3 axes at 90% throttle. change absolutely !!! now is in the range !!!
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| Author: | ZeXx86 [ Tue 24. Mar 2015 22:41:39 ] |
| Post subject: | Re: tail wag and rescue to backwards on a Trex 450L |
Oh nice, it is much better now. You can try this again with tail blades to measure it more precisely. Sometimes tail blades can make big difference. |
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