Moderator Comment by Gary Mortimer on April 21, 2010 at 4:52am

Tunnel vision there Hooks

Moderator Comment by Hooks on April 21, 2010 at 4:58am

Camera inside fuselage.
Yes I know not the best vision, but it will save my camera.

Comment by Krzysztof Bosak on April 21, 2010 at 5:57am

1:18...1:22 IMU runaway, trusted the accelero which hit the ceiling because of vibration+resonance?

Moderator Comment by Hooks on April 21, 2010 at 6:06am

Something like that.. But had a few flight without any problems, also after this flight.
Didn't think on going manual in the seconds. Just watch it go down.

Comment by Krzysztof Bosak on April 21, 2010 at 6:23am

"But had a few flight without any problems, also after this flight."
Typical vibration problem. AP touched the wall during high-G then started vibrating.
Maybe a 'landing' repaired it temporarily.

Moderator Comment by Hooks on April 21, 2010 at 7:21am

I think I will use a rubber plate between the motor and the carbon body, even though AHRS hangs in rubber bands.

@Gary apparently you where right about Tunnel vision too much G.

Comment by Brian Wolfe on April 21, 2010 at 7:31am

Hey Hooks,
What did that value represent in the upper left that your bubble pointed to?

At the risk of going against conventional wisdom and opening Pandora's box I would throw out that vibration isn't necessarily bad unless one of two things happen - you saturate your sensors or components of the vibration violate Nyquist and fold over. In the case of sensor resonance it will usually saturate for a short time so you should be able to see that in the data (are you logging?). Nyquist fold over is harder to see in the data, you just need to really look hard at your analog bandwidth before sampling vs your sample rate.

What autopilot are you using? Nice setup, I like the airframe.

Moderator Comment by Hooks on April 21, 2010 at 7:52am

Hi Brian,

This "AP" is a china RTH and Circle unit, But after testing this unit I have a full AP system from same company to test. I would like to test it in my small airframe, but the company says the new Skywalker would be much more stable.

Comment by Brian Wolfe on April 21, 2010 at 8:10am

Cool. Maybe I should get one and reverse engineer it so we can evaluate quality and "hack" potential. Do you have a source?

Comment by Krzysztof Bosak on April 21, 2010 at 8:18am

@Brian Wolfe
A brilliant UK engineer... going to reverse engineer... a Chinese product...
This is the Fall of Western Civilization. No hope.

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