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Old May 07, 2007, 05:35 AM
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Conventional tails aren't necessarily immune to this either. For example, the Martin Seamaster four-engine jet flying boat bomber had an adjustable horizontal stabilizer for pitch trim. Unfortunately they sized the actuator for it a little too small. During a test flight, the loads on the actuator overcame it, driving the stabilizer into full nose-down trim position, resulting in a fatal crash.

A simillar problem has bought down an airliner or two........but that may have been to do with the bolts fixing the actuator.
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