The symmetric thrust in normal operation is the main
difference, Vmca is still present anytime the engines are
not on the centerline. Having the engines effect the thrust
line the same makes the speed at which you stall, spin and
die the same, it doe snot eliminate the danger.



"RomeoMike" wrote in message
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| Mark Levin wrote:
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| Out of curiosity does this have a marked effect on it's
operation compared
| with the other twins you've flown?
| Any procedures different because of it?
|
| My solo multi time is limited to light twins. The most
noticeable
| difference in "normal" flight is the decrease or absence
of left turning
| tendency in high AOA situations such as TO and climb
because P factor
| and torque from one engine cancels those factors from the
other engine.
| The other main difference with counter rotating props, of
course, is the
| lack of a critical engine. In other words, no more
asymmetrical thrust
| is produced if one engine fails compared to the
other.Therefore, turning
| tendencies are less when practicing critical engine out
procedures (or
| Vmc demos) than they would be in the conventional set up.
I wouldn't say
| that any procedures are different. One still practices the
same things.
| There is still a lot of asymmetric thrust in engine out
scenarios. A
| multi instructor once told me that a twin is like any
other airplane,
| but when it loses an engine it becomes a sled. I would
add, "even if it
| has counter rotating props."
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