GORDON RIGG <<gordon.rigg245km>> writes:

There are several downloadable applications for the iphone that use the internal electronics in the iphone to make it work like one of those electronic inclinometers - as used by CIVL officials to measure sprog angles on topless gliders. Who knows how accurately it works, but CIVL can't measure accurately with their expensive instruments either (At the worlds they were also checking with a protractor, string and a dangling weight:)). Look for angle 1.1.1 or TiltMeter.