Mark seems to have a plan for getting his ASI calibrated and for getting the pitot-static system ironed out, but for anyone who wants to fiddle with actual calibration of their airspeed indicator (on the ground, not using GPS or timed distances), there is a fairly simple method using plastic tubing and a yardstick. The article is available on Jim Weir's RST Engineering webpage, at http://www.rst-engr.com/rst/articles/KP89JUL.pdf
And never, ever blow into your ASI or the tubes leading into or out of the pitot-static system! Oscar Zuniga San Antonio, TX mailto: taildr...@hotmail.com website at http://www.flysquirrel.net
