🚀 go-pugleaf

In article <5084@boulder.Colorado.EDU> ciciora@tramp.Colorado.EDU (Ciciora) writes:
>In article <2810@kitty.UUCP> larry@kitty.UUCP (Larry Lippman) writes:
>>In article <848@earvax.UUCP>, sbcd@earvax.UUCP (Scott Dynes) writes:
>>> I'm looking for help on the following: I would like to get/make an
>>> airspeed sensor for R/C models. This would require 1) a small
>>> accurate (and light!) pressure sensor that would run off a small set
>>> of batteries, and 2) a similarly small, light, low-power way to get
>>> the information down to earth. I'm thinking of having the output be
>>> a tone whose frequency is proportional to the airspeed. Does anyone
>>> know of such a system, or where to look for the individual pieces?
>
>  -a)  Bust a small light bulb.
>  -b)  Run a constant current through it.
>  -c)  Measure the voltage accross it vs air speed.
>
>I once wanted to measure air speed and this was the method sugested.
>Never really calabrated it, though.  Not sure how.  It was interesting
>to send the output to a O'scope and look at the fluctuations of a fan,
>person walking by, blowing, etc.  Made a nice lunch-break hack.
>
>Hope this helps,
>
>Steven Ciciora


Didn't the Voyager Mars Lander (talk about r/c!) use something like this? 
My understanding was that four were used spaced at 90 degree intervals 
which allowed direction as well as speed to be measured. I don't quite 
see how one would determine the direction but this might be neat to play 
around with. If anyone has ever done anything with this I'd like to hear 
about it. It would make a neat addition to a home weather station.

regards,

Phil Biehl

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usenet:		...!{decvax,hplabs,zehntel,reed,uw-beaver}!tektronix!orca!philb
csnet:		philb%orca@tektronix.csnet
work ph:	(503)685-2122
mail:		Tektronix Inc., IDG MS 61-028, POB 1000, Wilsonville OR 97070