Yes. they turn the same way.
http://en.wikipedia.org/wiki/C-130#Specifications_.28C-130H.29 -- four of the same engine.
Yes, this leads to interesting torque effects.
While I don't have specific knowledge of the C-130, you can feel assured that things are done in the design to compensate for these effects -- such as tipping all of the engines slightly, the vertical tail tipped slightly to counteract the torque.
On twin engine airplanes if the propellers turn the same way, you have a "critical engine." http://en.wikipedia.org/wiki/Critical_engine.
Airplanes with counter-rotating propellers do not have this problem.
While aerodynamically, counter-rotating props are desireable, they are a logistical problem... requiring double the parts inventory, as two different types of engines be available for the same airplane.
I used to operate a Piper Seneca, which had counter-rotating props. Had it been a conventional twin engine airplane, I would have kept an engine on hand... then, if one engine would need major maintenance (say a top overhaul,) it would be relatively easy to swap engines and keep flying. Keeping two engines on the shelf was economically unfeasable.
· 10 years ago