Quote:
Originally Posted by 41Sqn_Banks
AP 1565B, Vol I, Section 8 was issued in August 1940 and mentions the "two different" systems. "6. The quadrant plate has a ... gate for the throttle lever in the take-off position". And in paragraph 7 mentions that the "red-painted thumb lever can be pushed forward in emergency".
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They are the same. The throttle had a section for takeoff gate postion, and the "Red painted thumb lever" covered that position as safety switch, physically preventing the throttle to be pushed into the take off position until it was pushed forward.
Hence the confusion. The manual itself does not describe any two different systems.