the airplane ends upside down and you split S to recover
Regardless of how many engines you have, or
how you got there ...
Recovery from inverted via a downward vertical maneuver
(which rapidly converts altitude to airspeed and almost
always ends up overstressing the airframe with excessive G)
is about the worst possible error recovery technique there
is, even if it's a TC Inspector pushing it.
Even in a very strong aerobatic aircraft this maneuver
must be flown carefully (ie entered very slowly, with lots
of altitude) to avoid hitting the ground, or pulling enough
G to permanently damage the airframe, or blacking out
and losing control.
It takes some practice to pull +10G without blacking out,
as you permanently damage the airframe, possibly to the
point of complete catastrophic failure.
I am only an engineer and airshow pilot so I probably don't
know as much about this sort of thing as compared to a TC
Inspector, but when you are inverted, the following are the
best recovery techniques:
1) push to the 45 inverted upline and 1/2 roll upright to level
(Best at low altitude - absolute minimum loss of altitude.
Done it many times. In formation)
2) 1/2 roll upright and pull like a bugger to level from the
resulting 45 upright downline. This technique chews up more
altitude than #1 but is not suicidal like the split-s technique,
recommended by TC Inspectors.
Most pilots would prefer to die than push a little -ve G, so
door #2 is probably best for them.
Just please, don't split-s? I do it very carefully at low
altitude but I have been flying accident-free for over
40 years, which is something a TC Inspector can't tell you.
TC hasn't a clue about this. For example, they tell you
to retard the throttle during a downward vertical recovery,
which results in excessive altitude loss, and possibly
impacting the ground. You know, death. That's what
they're teaching.
Minimum altitude loss is achieved by using full throttle.
Something TC doesn't understand, and never will.
Many times on Saturday I was pointed vertically downwards
at 180 mph at 500 feet above the runway and pulled +6G
to level above the runway. At full throttle.
Perhaps I have a clue about what I speak.
Many TC Inspectors
clearly do not.