The only vario I used required you to drill a hole in a 1/8 inch dowel and then split it lengthwise and install two matched thermistors just touching each other in the split airway. Then you glued the dowel back together, hooked one end of the dowel to an air reservoir, and wired the two thermistors and two fixed resistors plus a trimmer as a bridge. The bridge controlled an audio oscillator that modulated a rf link to your receiver on the ground. Maynard made it sound simple at the time but it took me almost 6 months to get it working and installed in my Monteray.
-- Dick Barker Port Angeles, WA - Turning HLG Around - >Daryl doesn't remember thermal sensors cause he's too young. But I never >thought "listening for lift" made a lot of sense, anyway, and have seen guys >flub around in otherwise good air cause they were listening rather than >watching. > >I still have one of the old units designed by Walt Good, which i bought in >73. I don't use it though as I got tired of it whistling in my ear. Besides, >the unit didn't discriminate very much. More trouble than it was worth. I >my opinion.Picolario's are just a variant... just more stuff to bother with. ..... RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED] Please note that subscribe and unsubscribe messages must be sent in text only format with MIME turned off. Email sent from web based email such as Hotmail and AOL are generally NOT in text format
