"Dico" wrote in message
oups.com...
Is there a web site that gives a good explanation as to why I want CR
props. There are hundreds of the earlier model Twin Comanches flying
without the CR props --- so what does someone with 300 hours single
engine time need to worry about? What actually goes wrong? And when
it does, what happens? I hear "critical engine" but it means very
little to me.


I would like to throw an interesting (if maybe false? I have no personal
experience or a cite.) factoid into this discussion.

I have read that the P38 Lightning was equipped with counter rotating props
that rotated in the opposite (down going blades on outboard side of engines)
from normal direction resulting in an aircraft with two critical engines and
much increased yaw force when either engine failed. This was done despite
control issues because it resulted in 15 knots extra top speed as compared
with CR props using typical configuration (down going blade on inboard side
of engines)

Someone more knowledgeable may be able to explain why.