Beats me... i do love a good 150 though
The grumman Cheetah,Tiger,Traveler etc all had a canopy mechanism which you had to slide the whole canopy forward, then cycle the handle to the open then closed position. (think toilet flush handle)
bad news with those was - you tweak the airframe in an off airport landing... its probably going to be jammed
good news - free air conditioning on the ground (and in flight you could open it up about 10-13 inches)
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