Today's discussion topic:
Reverse 1/2 cuban-eight from the surface.
This maneuver is considered so dangerous by some
(eg contest) aerobatic pilots, that they think it should
never be attempted (see IAC mailing list archives).
I do it all the time. If you understand a little physics
it's no big deal. If you don't understand a little physics
you are going to die, like the Shoreham Hunter pilot
and the unfortunate people on the ground underneath
him.
Here's how you fly a safe reverse 1/2 cuban-8 from
the surface:
You apply the entry (bottom) and top gates. The
entry gate tells you if the maneuver is possible. The
top gate tells you if you are going to die or not.
I like to see 180 mph at the surface and full power
(entry gate). Pull briskly to 45 up, look left for pitch
angle, glance at both wingtips to ensure no bank.
Can't see shit forward. Count two thousand, then:
1/2 roll inverted, look up to level the wings, look
left for the 45 upline. Count four thousand.
Now, time for the top gate, which is defined as at
least 1000 AGL and less than 80 mph. The former
is more critical than the latter. The latter determines
how much G you are going to pull in the remaining
5/8 inside loop to the surface.
Through 1000 AGL (altimeter catches up), ASI down
to 80 mph, then we gently let the nose drop - we
do NOT haul back on the stick - and now we are
going to do a low-altitude split-S.
Because we have 1000 AGL, we are going to live.
Full power, despite what TC tells you, for minimum
altitude loss.
Gently back on the stick to the vertical downline,
then as the speed builds, at least +4 (or +5 or +6)
G to level at the surface.
Ask any TC Inspector to demonstrate it for you.
I have safely done thousands of them, over the
decades, both solo and formation, mostly at the
surface. I get scared of heights when I have to
do acro up high, which is actually a mostly IFR
exercise because there is no ground reference
like at the surface. Might be a horizon, maybe
not. After a while you won't care, though the
newbies make a HUGE deal about hazy days.
What puzzles me is the complete lack of
interest 99.999% of pilots have in applied
newtonian physics, which they are the practioners
of. This lack of knowledge curiously does not
diminish the strengths of their opinions on
the subject. A meta-lesson there.
I struggle to find a pilot that can write the
lift equation on the board, or sketch the Cl
and Cd curve for his airfoil.
Gratuitous off-topic moment: picked some
fruit off the trees in the back yard today.
Here is a picture of the lemon:
Elderly iPad and mandarin orange for scale.
The lemon looks like something from a Woody
Allen movie.