Robert:  What you are looking for is gyro inclinometer -
probably a solid-state gyro inclinometer.  Do a Google
search for "solid state gyro" and/or "gyro inclinometer"
and you will likely get a bazillion hits.  The trick is
finding one that is cheap!

You /could/ use an accelerometer like the one suggested
earlier.  You would have to keep track of the current bank
angle (in your microcontroller) at all times.  For
example, the accelerometer won't tell you you /are in/ a
standard rate turn - but it will have told you earlier
that you entered it.  Since it hasn't told you that you
returned to wings-level, you know you're still in the
turn.  AFAIK, laser-ring accelerometers were the standard
devices used in autopilots for many years until GPS was
approved recently.

-matt



>>Sorta, except that it's (AFAIK) just an accelerometer and won't tell you
>>angle relative to the horizon in a dynamic situation. I.e., if you're in a
>>coordinated 1 G turn, it'll tell you you're level, whereas you will have
>>approximately a 60 degree bank. My question dealt with how you can measure
>>tilt in a dynamic, not a static situation.
>>In "real" aircraft, a mechanical gyro remains level with the horizon, no
>>matter what position the airframe takes relative to the horizon. I want to
>>duplicate this in a UAV without the expense of a full-up mechanical gyro
>>system.

>>- Robert

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