Thx for the link Brian!
I found the article about P-factor vs Slipstream very interesting, as well as this last article link by flyer101flyer, the observations by A Squared all of those who have posted their thoughts and explanations, and will try to "absorb" the contents as deep as my limited math, and physics in this area allow me to...
But the more I read across the thread, the more I am tempted to think that, while in most flight simulators the roll due to torque is probably the main effect being modelled, with some exceptions,
in real life it is compensated not only by the asymmetric slipstream hit of different aircraft surfaces, causing a left yaw and partially canceling the torque moment, while at the same time, minor pilot
inputs will overcome the rollig tendency, rigging will play it's role, and all together this results in, IRL, it being a lot easier to "fight" this rolling moment than in the sim, unless we're driving
a p51d, or another powerful prop aircraft ( without counter-rotating props ) and we push hard on the throttle, specially if at lower speed / higher AoA and find ourselves flipping upside down...
Another, somehow related question I have been asking myself is if there is a significative difference in the contribution to the net torque of a conventional reciprocating prop engine or non-free running turboprop,
as opposed to a free-running turbine, where there is no direct mechanical conection between the prop shaft and the engine case, other than the compressed air flow and the fixed slats on the
compressor... On such an engine / prop system, the torque comes mainly from the interaction of the prop with the airflow that it "cuts", causing the natural torque reaction, while in a convetional
reciprocating or non free turbine there are actually two cause for the torque, one inside of the engine, caused by the reaction to the force applied by the "crankshaft" and the other throught the
reaction of the airflow to the prop cutting through it. Or... am I completely missing something here ???
Last edited by jcomm; 8th March 2014 at 21:52.