Originally Posted by
button push ignored
A bit of history.
The Cessna 170A had non slotted - fowler type flaps that went to 50 degrees.
The 170B had regular type flaps 40.
The 170 and 170A have plain, non slotted flaps. The 170B has slotted fowler flaps. (just like most other cessna singles from the early '50's on)