barit1
The torque resulting in a prop aircraft is because the slipstream leaving the plane of the prop is rotating - a vortex, the result of the action of the blades' airfoils. The air is accelerated both aft and in the direction of prop rotation. This vortex represents lost propulsion energy.
Oh, I thought there was some kind of gyroscopic effect at work from the gear-box.
Turbine D
You are going to see more and more FOD damage to engines, all sizes and all makes and models. The reason is birds. There were 150 severe bird strikes reported in 2009, up 40% from the average 2000 through 2008. The increasing trend applied to 2010. More birds are hanging out around airports than ever before. Recently, I was waiting for a flight from Palm Springs to SLC. When the plane came in to Palm Springs, it hit a flock of birds causing some damage to one engine and lots of dents to the right wing LE slats. Its not unususal these days.
Why is this so? Didn't they have various things to keep birds away from airports?