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From: waynea@cadnetix.COM (Wayne Angevine)
Newsgroups: sci.electronics,rec.models.rc,rec.aviation
Subject: Re: Electronic variometer plans wanted
Message-ID: <9542@cadnetix.COM>
Date: 18 Sep 89 18:25:15 GMT
References: <25730@iuvax.cs.indiana.edu> <13654@well.UUCP>
Sender: news@cadnetix.COM
Reply-To: waynea@cadnetix.COM (Wayne Angevine)
Organization: Cadnetix Corp.,  Boulder, CO
Lines: 11

Ace R/C markets the Thermic Sniffler (undoubtedly TM) which is
what you are looking for.  It is used by R/C glider pilots.
It sends out a continuous tone (I believe on 50-some MHz) which
varies in frequency according to the vertical speed.  I believe
that the cost is around $150 with receiver.  The package weighs
a couple of ounces.

    Wayne Angevine		Internet: waynea@cadnetix.com
    Daisy/Cadnetix Corp.	UUCP: cadnetix!waynea
    5775 Flatiron Pkwy.		      {uunet,boulder,nbires}!cadnetix!waynea
    Boulder, CO 80301