Roy wrote:
>About -
>
>"you need a backup system - just in case your nifty micro controlled wonder
>goes south!"
>
>If your exhaust port aims straight up, simply fly a little thin-paper 'kite'
>tethered by three threads above it. Since it moves around, your eye will
>instantly notice if it should crash due to lack of air flow. So basic it
>can't fail -- remember, "simplicity is ingenuity".
>
Let me guess, now... you don't have a cat?
--
73 from Ian GM3SEK
http://www.ifwtech.co.uk/g3sek
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