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Inspire drift - please help

Discussion in 'Inspire 1 Help' started by Lofty Visions, Dec 3, 2015.

  1. Lofty Visions

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    Hi guys

    I have my CASA flight assessment coming up soon so I would really like to get this problem sorted before then.

    I have an issue with my Inspire where it drifts a fair bit, especially yawing at slow speeds. Even going forwards with a mild side wind is a struggle to keep straight. Living in the 3rd windiest city in the world doesn't help either!

    Are there any settings I can change to help the Inspire stay more locked on to its GPS point? I've done IMU and compass calibrations all by the book and I have plenty of satellites but I did reduce the throttle down, rudder left and backward/left settings from 40 to 30 in order to smooth out the controls a touch. The other settings are brake 90, attitude 100, yaw endpoint 150, gains are all at 100.

    At times it's almost like flying in ATTI. I know there's more momentum than a Phantom due to the extra weight but it's a bit of a pain, especially when trying to do the slow speed figure of 8 for the assessment.

    I am used to flying in ATTI but I would prefer to get this GPS issue fixed obviously.

    Any advice would be very welcome! Thanks
     
  2. Canuck32

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    Have you done a RC stick cal? Sometimes it can cause a drift issue if they are out of cal.
     
  3. Lofty Visions

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    Hmm no I haven't. I will give it a try. Thanks
     
  4. Scotflieger

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    For your test as you will not be filming increase you braking sensitivity to 100 or 110. I recently found my aircraft drifting downwind when yawing in the hover (as though it was in ATTI).
     
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  5. IrishSights

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    I also found that too much brake caused drift when yawing in high wind.

    I actually first experienced this during my flight exam in 17 kt winds, which was embarrassing! Reducing the braking solved the problem...and I passed!
     
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  6. Lofty Visions

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    Thanks fellas but I'm confused from your last two posts. Do I increase or decrease the value? I thought setting it at 90 would decrease the braking, which would make it smoother for filming. I think you mean increase the value to stop the yaw drift?
     
  7. IrishSights

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    Too low a value caused my problem. I increased the value.
     
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  8. Lofty Visions

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    Ah got it, thanks. I will have a play with that setting this weekend if the weather improves. Much appreciated :)
     
  9. Scotflieger

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    I think @IrishSights and I are now in agreement. Increase the value to increase braking effect and reduce it for smoother filming. I tend to keep mine high due to the invariably high wind conditions I fly in.
     
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  10. Lofty Visions

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    Thanks, it makes perfect sense. I too have to deal with high winds pretty much all the time so I will definitely try it.

    The only reason I reduced the expos was because of over sensitive controls causing jerkiness. Do you think I should put them back to 40?
     
  11. Scotflieger

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    No. Keep your expos to the level you find comfortable for smooth flying. The test is looking for accurate and smooth control. It is not a race and should not be timed. Demonstrating safe flying is the key. Good luck.
     
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  12. Lofty Visions

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    Will do, thanks :)
     
  13. Canuck32

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  14. Lofty Visions

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    Thanks guys. I got a break in the weather yesterday and tried a few of those settings out. A definite improvement increasing the brake value, although some jerkiness has come back at very low speed. Still a bit of drift but much better than before. I also messed with the expos a bit and found 40 a better bet for low speed work. However, I'm going to drop them back to 30 after the test.

    Never got chance to try adjusting the stick length, but I will try next time. Thanks for everyone's help, much appreciated :)