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Post by edintexas on Mar 5, 2013 16:23:42 GMT -4
I think I get it. It takes more tail pitch to piro CW than to piro CCW at the same rate. So, if you want your left/right piro rates to be the same, your endpoint setting for full left rudder would have to be lower than for full right rudder assuming that the main blades turn CW. Is this correct? My kit came with a GY401 gyro which I'm not planning to use and a GT9 gyro that I am planning to use. So do I set the endpoints with the TX or in the gyro? And thanks for your patience.
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Post by chitty024 on Mar 5, 2013 16:39:09 GMT -4
Gyro, I will say I had bad luck with the gt9. I learned a valuable lesson, never go cheap on the gyro or tail servo. I use a quark on all of my birds now.
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Post by Chris Reibert on Mar 5, 2013 16:44:12 GMT -4
^^ YES!!! ^^
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Post by Valkman on Mar 5, 2013 17:56:10 GMT -4
That is correct edintexas. You cannot change end each endpoint on the gy401 only full throw equal to both directions. I'm not sure about the quark or the gt9 they may be the same. I would use the gy401 before the gt9. I originally got the GT 90 with programmer box with mine and you can change each point along with a host of other options. It's a good gyro and is a better gyro than the 401, which also is a good enough gyro for most.
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Post by osidak on Mar 5, 2013 20:19:08 GMT -4
quark you set both endpoints during setup. Much easier to setup and the GT9 - I haven't had issues with my gt9 however
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Post by Valkman on Mar 5, 2013 20:35:53 GMT -4
Thanks for the update. They are supposed to be a very good bang for buck gyro. Nearly all mine are FBL now so I don't think I'll get to use one at this stage.
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Post by Chris Reibert on Mar 5, 2013 20:48:07 GMT -4
The quark you are setting inner and outer limits. To speed up your piro rate you increase your endpoints or atv's in the radio. Limit sets your mechanical range and end points determin your piro rates. At least with the DX8
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Post by edintexas on Mar 6, 2013 6:35:39 GMT -4
I've read that the GT9 likes to run at 6 volts and most of the folks who have had problems with it were running it at a lower voltage. Can anyone confirm this? I have a CC BEC Pro and I have it set at 6 volts.
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Post by Dr. Evil on Mar 6, 2013 9:40:53 GMT -4
I've read that the GT9 likes to run at 6 volts and most of the folks who have had problems with it were running it at a lower voltage. Can anyone confirm this? I have a CC BEC Pro and I have it set at 6 volts. Yes, I've read the same. Very picky.....
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Post by luckyarmpit on Mar 6, 2013 11:38:23 GMT -4
I'm also a huge fan of the GY401. Not a fancy gyro by any means but it gets the job done. My two scale birds are running just fine on the GY401.
I've got options, thankfully. For the Chaos 600e that came yesterday, I can go with either the GT9 gyro that came with it, the GY520 that came off my T-Rex 500e (replaced with a Naza-H), or an Align GP780 that came with a T-Rex 600 EFL/Pro (which I no longer own). The GP780 is NIP.
I wasn't exactly thrilled with the GY520. How do you adjust the gain on the GT9... from the transmitter? For Futaba do you use standard and not AVCS?
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Post by luckyarmpit on Mar 6, 2013 11:55:09 GMT -4
And here's another question... what's the pulse width of the tail servo that comes with the kit? If it's the MKS DS1210, which I think is, lists the frequency (120Hz) but not the actual pulse width (760µs or 1320µs). Neither RC Aerodyne or MKS's website list it.
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Post by Valkman on Mar 6, 2013 12:50:22 GMT -4
Most servos are 1520 nowadays.
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Post by luckyarmpit on Mar 6, 2013 15:20:27 GMT -4
So I went home at lunch and grabbed a couple of the servos. The tail servo is a "PowerHD DC1219MG". I had to do some digging but found that servo is made by HuiDa. They list it as an on-road car servo, not a helicopter tail servo. Should I be concerned and/or not use it for the tail? Or have others used it with no problem? The good news is that the website does list the pulse width and frequency.
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Post by Dr. Evil on Mar 6, 2013 16:08:53 GMT -4
So I went home at lunch and grabbed a couple of the servos. The tail servo is a "PowerHD DC1219MG". I had to do some digging but found that servo is made by HuiDa. They list it as an on-road car servo, not a helicopter tail servo. Should I be concerned and/or not use it for the tail? Or have others used it with no problem? The good news is that the website does list the pulse width and frequency. I believe that is the same one I have on my 600 size airwolf.
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Post by Valkman on Mar 6, 2013 16:14:32 GMT -4
I just got onto that website .10 at 4.8 and .09 at 6v is fast enough mate.
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