Xref: utzoo sci.electronics:4392 rec.models.rc:1107 Path: utzoo!utgpu!watmath!clyde!att!pacbell!ames!pasteur!agate!labrea!decwrl!decvax!tektronix!tekig5!tekig4!brianr From: brianr@tekig4.TEK.COM (Brian Rhodefer) Newsgroups: sci.electronics,rec.models.rc Subject: Airspeed sensing Summary: Maybe use sound? Keywords: airspeed, R/C models Message-ID: <3508@tekig4.TEK.COM> Date: 5 Dec 88 21:07:41 GMT References: <848@earvax.UUCP> <2810@kitty.UUCP> Reply-To: brianr@tekig4.TEK.COM (Brian Rhodefer) Distribution: na Organization: Tektronix, Inc., Beaverton, OR. Lines: 12 The suggestion to use two matched thermistors in a bridge is quite good. I don't know if the following would be any better, but it might be more easily calibrated: Transmit an ultrasonic tone burst from one end of the aircraft, and pick it up at the other. The transit time for the pulse will be a function of the component of the airspeed along the line between the transmitter & receiver. Suggestively, Brian Rhodefer ...!tektronix!tekig4!brianr