Why are multiple engines different?
Jim, I need help. What are vmca and vmcg?
--and with regard to Vmc, I thought that that was the minimum
controllable airspeed with one engine not operating and the other one
at full power. With reduced throttle on the operating engine, Vmc goes
down. So in the case of a landing aircraft, it is actually possible to
approach and rotate below Vmc without loss of controll. The closer you
get to a deadstick landing, the lower the rotation speed could be.
Obviously there are reasons not to do this--I am just commenting on
control issues. But please help me on vmca and vmcg.
Jim Macklin wrote:
The first speed that comes to mind should be reprogrammed to
be Vyse, you'll live much longer.
If you look at an old multiengine manual, such as the Beech
BE 95-55 they advertised very short take-off and landing
distances and the plane will do them. But you would rotate
10 knots below Vmc and fly the final at about Vmc. If the
engines were running, no problem. Loss of an engine meant
almost immediate crash unless you were very quick and lucky.
Modern POH says, rotate at not less than Vmc+5, accelerate
to Vxse-Vyse quickly. Gear remains down until Vyse or
you're out of runway to land straight ahead or you reach
circling minimums. On landing, maintain Vyse until landing
assured.
"Emily" wrote in message
. ..
| Jim Macklin wrote:
| I didn't mean to say that either. Vmca (Vmcg too) are
very
| important, but Vyse is the first performance number for
a
| light twin [along with Vxse], similar to V2 for a
transport
| category aircraft.
| Vyse is shown by the blue line and that is the target
| airspeed.
|
|
| I have a multi rating, thank (two of them, actually).
|
| I was simply throwing out the first airspeed that came to
mind.
|