At 08:58 PM 30/05/2011, you wrote:
On 30/05/2011, at 8:18 PM, Mike Borgelt wrote:
So hopefully when the computers went off line the back up display
worked from the gyros and accelerometers? With the quality of the
gyros and accelerometers they would be using the attitude display
at least ought to work usefully for some minutes at least, without
air data inputs.
The ISIS is another electronic system, not a gyro-based steam-gauge
system.
It takes data from the third set of pitot/static probes.
If they're iced over, then the ISIS doesn't work.
Go back and look at David's diagram. See the box marked ISIS? See the
little legends in it that say accelerometers, gyrometers?????
The gyros are probably solid state laser ring or fiber optic rate
gyros, not mechanical ones. They may even be MEMS gyros but given the
age of the design I doubt it. MEMS gyros are in things like the Dynon
instruments etc found in Experimental homebuilts.
Mike
Borgelt Instruments - manufacturers of quality soaring instruments since 1978
phone Int'l + 61 746 355784
fax Int'l + 61 746 358796
cellphone Int'l + 61 428 355784
email: [email protected]
website: www.borgeltinstruments.com
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