I'm working on my next UAV. Since I'm not planning FPV flight with this one I'm using a 6 ft Tellemaster with power in the nose. I was wondering if anyone has any numbers or ideas about how much friction loss can be tolerated in the pitot tube without affecting the airspeed calculation. How would I adjust the code to compensate. I'm estimating 16" of tubing from the sensor to the pitot.
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For our 8-foot Telemaster, we've been putting the pitot out on the wing, with a similar amount of tubing -- as long as you can get the end of the pitot far enough out in front of the leading edge, it works fine. We use a piece of brass tubing as a connector so the wing can be dismounted.
I haven't heard of this being an issue, but we do tend to use small diameter tubes in our stuff. As far as I know, the pressure will equalize in the tube to that at the mouth of the tube, and length only adds insignificant lag in time for that to happen. Funny, I'm working on my pitot now!
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