Quote:
Originally Posted by basjoos
The simplest ASI would be the Hall airspeed indicator used on ultralights. It is an 8" vertical tube with an opening at the bottom facing upwind containing a ball which rises higher with increasing airspeed. They read from 0 to 80 MPH, cost about $20, and are readily available on-line.
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Please post a link. For $20, I gotta have one!