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Inspire drift - please help

Joined
Aug 15, 2015
Messages
126
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Location
Perth, Western Australia
Website
www.loftyvisions.com.au
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
 
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
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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Ah got it, thanks. I will have a play with that setting this weekend if the weather improves. Much appreciated :)
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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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?
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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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 :)
 

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