>Got to ask Andy. What was the application? Can you say? Sounds interesting!

Application with integrating accelerometer - can't say right now, but it applies
to model airplanes and is totally passive.

>BTW have you ever used any of this stuff in any of those fast targets err
>surface craft you like to play around with. Is it possible to add any sort
>of stability enhancement (or would that spoil all of the fun...).

I ran my Patriot (www.rc-hydros.com/patriot.html) at the Nationals.  It was
built for one, to use in pitch control.  I chickened out of using it at the last
minute, and just locked the servo into my third channel (I was mixing third
channel (pitch) plus ADXL to stabilize the boat).  As it turned out, I was
glitched just after the start and the impact snapped off the canard.  I ran the
rest of the heat at full-bore, trying to catch the leaders, and ended in 4th
place.  I have video of it on my CD "catalog", but not on the net (too much
space used already).

I chickened out because I hadn't had test time.  Testing means hooking up the
boat on a pivoting mechanism, hooking that on a pickup truck, and going for a
drive at 40MPH to see how it responds.  I don't think it will be especially
useful on this boat, as I designed the aerodynamics to avoid the buildup in the
first place.  The only time it blew off was in testing, with the CG about 6"
back from where it belongs.  The only other time it launched was when I hit a
buoy, and that made a nice little airplane flight!


> from the GAL.  Super-accurate mixing, only used 3 pins to get 2 inputs and
2
> outputs with .5uS resolution.  The logic was all very fast and short code,
> leaving lots of codespace to do things like variable mix ratios, expo,
etc.

This design was a elevon/v-tail mixer.

Andy

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