> Every Air Force aircraft that I've flown had a "peanut" gauge - a backup attitude indicator to confirm what position you were in. I would think that her aircraft had a backup....hopefully. Not a time to be the weather! She did well.
In the case of a light plane like the Commanche, the attitude indicator (aka vertical gyro) IS a peanut gauge. There's no backup attitude indicator. Instead, if the attitude indicator fails, instrument rated pilots are trained to use the remaining instruments: airspeed indicator, altimeter and turn coordinator. The turn coordinator is a rate gyro that doesn't tell attitude but does indicate if the aircraft is turning. The attitude indicator and turn coordinator always use independent power sources; typically the attitude indicator is powered by a vacuum pump while the turn coordinator runs off the electrical bus.
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Today's Featured Article - History of the Nuffield Tractor - by Anthony West. The Nuffield tractor story started in early 1945. The British government still reeling from the effects of the war on the economy, approached the Nuffield organization to see if they would design and build an "ALL NEW" British built wheeled tractor, suitable for both British and world farming.
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