Interesting responses...

I'm thinking that a heavier prop will be more resistant to acceleration (flywheel effect ). Of course, that might be negated (to a certain extent ) upon deceleration, right? You hear a lot of guys "jockeying" the throttle while hovering and throttle fluctuation during hovering/torque rolling.
Sure, a lot of it is to maintain altitude, but if you watch and listen closely, the airplane wants to torque roll more as each "goose" of the throttle has to accelerate the prop. (equal/opposite reaction )

The ratio of mass of the prop to airframe is high, for sure, but we still can do torque rolls...Why?

I'm wondering what the MAJOR force involved is then?

Why would we ignore aerodynamic drag on a spinning propeller? There is a lot of drag on a spinning prop...that's one of the major forces on a prop. I know, we're talking theoretical, right? But, that's one of the reasons we can torque roll in the first place, isn't it? It takes torque and horsepower to turn that prop, and the "equal and opposite reaction" is "torque rolling" whether the aircraft it in an upright or level position, right? (or wrong? I don't know for sure, I ain't no physicist... just wonderin' )


Prop wt. has a major influence on throttle response, but I think it also effects the rate of (torque ) roll...JMO