C150 Questions
I am a member of a group who operate a C150 (1976 vintage). The flap lever, when selected 'down' from neutral is a 'momentary' switch operating the electric motor, and when selected 'up', stays in the 'up' position until re-positioned either to neutral or 'down'. The flap position indicator is on the inside left windscreen pillar (a little inconvenient when trying to keep your eye on the ASI, and is marked at 10,20.30 & 40 degrees. There is no detent on the switch, so you can select any position down, to 40.
I tend to fly the approach at 20 degrees, 30 for short field. When I learned to fly on the 150, we were discouraged from using 40 degrees, as the aircraft will not climb at this setting, and needs full power just to maintain altitude; (some more 'tired' models would not even do this!). Also, when retracting the flaps (say in a go-around), you can be caught out by selecting up, and then having the flaps retract fully unless you re-select neutral at the appropriate stage.
I think a few clubs may still operate the 150, although most now use the 152.
RB