How to measure takeoff and landing distances
I tried out an intersting way to measure takeoff and landing distances, I thought I would share it with everyone. I placed a white line on my tire, measured the distance it takes for one revolution, set up a GoPro camera on my strut and recorded the takeoff and landing. I downloaded to my IMovie software, slowed it down and counted the number of revolutions and multiplied it by the distance of one tire revolution. Worked great, here's the YouTube video link:
http://youtu.be/ngs7hFfrT9M
Flight Testing with Video Cameras
Great use of the video camera for flight testing!
If you put distance marks on the runway, you can calibrate the distances, too! Regretfully this method doesn't work if the brakes are applied. In fact, that (when brakes are applied) is how anti-skid braking systems are evaluated/tuned (difference between wheel speed/distance and GPS speed/distance).
You can also use the video camera for ground airspeed calibration, lag calibration, airborne airspeed calibration, etc. It's an awesome tool ... and even more useful if you know the frame rate.
Please email me at fly-in-home@att.net The video of your local airports has made me homesick for Illinois. I grew up in Washington. It looks like your home airport is Mount Hawley ... my oldest brother still lives in Alta.
Great Job! Thanks, Ron