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| Nick Wippen https://www.spirit-system.com/phpBB3/viewtopic.php?f=20&t=4285 |
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| Author: | gerry [ Fri 18. Sep 2020 17:36:38 ] |
| Post subject: | Nick Wippen |
Hello Tomas! I flew in my helicopter with the Spirit RS today. So far everything fits, I just have one problem and I can't get it away. In the middle speed of about 1900 RPM, I have a rocking over Nick. I tried to reduce the cycling gain but it didn't help At 1600 RPM and at 2100 RPM I didn't have the problem, I also tried to reduce the mean speed to 1800 RPM, it didn't help either. I'm afraid that the helicopter (SAB Kraken) will generate too many vibrations in this speed range in the middle. According to the vibration recording, I'm there at about 43. Is that too much for the spirit? Do you have a tip for me what I could try? |
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| Author: | ZeXx86 [ Fri 18. Sep 2020 17:58:55 ] |
| Post subject: | Re: Nick Wippen |
Hello, for sure vibrations are not a problem. The problem is rather in rotor head. Maybe blades are too tight in the blade holders. |
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| Author: | gerry [ Fri 18. Sep 2020 18:25:18 ] |
| Post subject: | Re: Nick Wippen |
Thanks for the quick reply. I'll try it tomorrow. Thanks for the tip! |
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| Author: | gerry [ Sun 20. Sep 2020 19:29:23 ] |
| Post subject: | Re: Nick Wippen |
Hello Tomas. Today I did some tests. I couldn't fix the problem. In the workshop I gave the red leaves down and let the engine run at all speeds. I could see that all three swashplate servos are very restless and The measured vibrations are between 35 and 40. I also tried signal progressing and mounted a second tape, no solution either? Do you have another tip for me? |
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| Author: | ZeXx86 [ Sun 20. Sep 2020 19:51:20 ] |
| Post subject: | Re: Nick Wippen |
Hello, probably Geometry 6° value is not correct (too high). What value you have configured now? This can be also responsible for the problem. There are many pilots with SAB Kraken that are flying without any problems, so it will be only some small issue. |
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| Author: | gerry [ Mon 21. Sep 2020 5:55:31 ] |
| Post subject: | Re: Nick Wippen |
Hello Tomas. The value is 110. But I don't quite understand what this value has to do with the tail wobble or with the trembling of the servos? |
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| Author: | ZeXx86 [ Mon 21. Sep 2020 8:09:00 ] |
| Post subject: | Re: Nick Wippen |
Hi, by nick do you mean Elevator? If yes then you could have for example bent main shaft or there is some problem in the rotor head. Maybe main blades are too tight in the blade holders. No other settings will cause this, except too high Geometry 6°. But Geometry value is looking good. With a certain RPM range the model could have resontant oscillations. This can be fixed I recommend only one supplied double sided tape. Two pieces are too much. |
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| Author: | gerry [ Mon 21. Sep 2020 11:36:37 ] |
| Post subject: | Re: Nick Wippen |
Ok. |
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