Is using less pitch on a prop reduces torque?
Actually, I like this conversation, as long as it doesn't deteriorate into an argument. (willembad, & outcast have some interesting observations and obviously come from different pilot training practices and flight experience, and I'm pretty sure neither is wrong.) I really don't care to add my personal opinion but I can tell you what is on the current FAA PP written exam.
That is:
Question 3207
"The torque effect (left turning tendency) is greatest at low airspeed, high angles of attack & high power situations"
(Their words not mine)
Question 3209
"P-factor causes the airplane to yaw to the left when at a high angles of attack"
(As in tail draggers in the first 100 feet)
To answer 3208
You must know that "gyroscopic Procession is the force applied to a rotating propeller acting 90 degrees in advance of the point the force was applied"
(This is the tendency to yaw left when pitched down.)
If you look back on this thread you will see that someone did post their experience using a 2” larger prop at the same pitch and had a big increase in rotation during a torque roll. So given all this info, I would first try a smaller & lighter prop if I wanted to decrease rotation during a torque roll. It may not work but it may be the best bet without buying a bunch of props.