Your engine produces full horsepower at a certain RPM (2700 ??). For STOL performance, you want high power (RPM) on take off and climb.
86 (inches in length) X 44 (inches traveled forward in 1 full revolution)
The bigger the "bite" (inches traveled forward) the more load on the engine - it will not allow the engine to turn a higher RPM when moving slowly at the beginning of the takeoff run.
A fixed pitch prop requires you to choose between takeoff performance (low "bite", high RPM on take off, but too much RPM in cruise) or cruise performance ( big "bite", lower RPM on takeoff, but full RPM in cruise flight).
For STOL performance you want lower bite for higher RPM and horsepower.
Hope this helps.
John Scott