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Re: [Paparazzi-devel] aircraft tuning question

From: Uttam Chandrashekhar
Subject: Re: [Paparazzi-devel] aircraft tuning question
Date: Fri, 24 Apr 2009 08:42:50 +0530 (IST)

Hi John,

You'll find a basic tuning procedure in the Paparazzi User manual. Please download that and have a look at the tuning section. It's pretty simple :)


From: John Burt <address@hidden>
To: address@hidden
Sent: Thursday, 23 April, 2009 11:08:40 PM
Subject: [Paparazzi-devel] aircraft tuning question

Hey folks,

I'm in the process of tuning the flight behavior of my Multiplex Cularis airframe using a Tiny 2..11 AP. Until recently, I had the plane flying quite well, with reasonable tracking of flight lines, circles and waypoints. I have to say, it's a real joy to see this elegant (yet cheap!) aircraft flying itself around the field.

However, I had serious problems when I recently launched the plane with a radio-direction finder pod attached ( Long story short, the top-mounted payload makes the aircraft unstable at low speeds and I need to increase the cruising airspeed.

There are so many parameters to tweak and I'd appreciate some guidance for the best way to do this. I assume that I need to adjust (at least) two parameters: 1) pitch during level flight, 2) cruising throttle. There are several pitch and throttle parameters, so which do I need to tweak to do this?

While I'm at it, I have another question: even without the pod, the plane tends to overcorrect a bit when navigating (especially when turning into the wind). Reducing NAV_PGAIN doesn't help very much. Any suggestions for reducing this?

Thank you!

John Burt

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