gt1878

Looking to go up to a turbo.

Well, I'm 15 hours into my newly acquired '69 F model. As warmer weather is approaching, I'm interested in keeping that cabin cool. POH says to open cabin vent and overhead air scoop for maximum cabin air flow. The control knob for the overhead air scoop works, that wire looks awfully thin. Will it actually close that scoop in flight? So, the operation is a little rough, if the vent is completely closed on top of the plane, the control knob won't open the vent. On the ground, if you get up top and open the vent, say 1/2" then the control knob operates it up and down fine, as long as when you close it, you leave it slightly cracked about 1/2". Is there not a max speed you can have the scoop open?