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Louis W Hartwig
Lou Hartwig was the test pilot that made all the flight tests on the Bell 533 progect with Walter Sonneborne as the Fligh Test engineer (he became a vp in engeneering) and Lou became chief pilot and manager of all flight operations.The aircraft is on display at Fort Eustes, Norfolk Va.
Lou Hartwig
was hired as a test pilotfor Bell on15th February 1955. The first production Bell 61 rolled out in early 55 and he was involved early in the program.The 2per rev vibs from the two rotors was very high so alot of time was spent trying to reduce it.