gmcjetpilot
Joined: 04 Nov 2006
Posts: 170
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 Posted: Tue Jan 16, 2007 11:44 am Post subject: Learning Basic Aileron in RV (HOW TO DO ROLLS) |
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Dear Acro Want-to-be's:
*Aerobatics is not a black art and we can talk about it.
*The plane flys the same upside down as right side-up.
*As a CFI, I recommend you get dual instruction.
*With that said there are many books on the subject.
*HERE IS MY RV ACRO "for dummies" explanation:
(note: I assume you are current and can fly all
private pilot maneuvers, steep turns, stalls (accel,
power on/off) and slow flight, unusual attitude recover.
Go practice all PVT maneuvers till you are comfortable.
QUICK: What is nose low unusual attitude recovery?
(power back, wings lever, pitch up to recover, 1,2,3)
This should be done smoothly with rushing or panic.
**ACRO FOR RV's**
First consider a G meter? I don't do acro without
one and also a parachute.
You can do acro all day at 3 g's. Any more you
are doing it wrong.
A split-S started at cruise could kill you,
meaning speed will go over Vne easy if entered
at a speed that is too high, about 100-110 mph.
Get some dual with an experienced pilot. Fly
under acro gross weight. If you can't do that in
your RV use another RV for dual instruction. To
be legal with two people, both need a parachute.
Strangely solo you don't need a parachute.
(Anyone want to bet me? I could use the $20.)
The old joke: "Anyone who teaches them self to
do acro has a fool for an instructor." Many
famous acro pilots had fools for instructors. We
don't hear from those who where not successful
who taught there self.
General rules:
You should plan on starting (and finishing) all
maneuvers at Va or less, about 135-140 mph, at
altitudes at or above 3,000 agl. Also before
undertaking Acro, you should practice and be
proficient on all your private pilot maneuvers,
like: slow flight, steep turns, stall (power
on/off/accelerated from different attitudes),
unusual attitude recovery and explore initial stall
entry / recovery.
ROLLS
I break it down into two lessons. Lesson one
practice leading up to doing rolls starts with first
practicing pitching up smoothly to 30-45 degrees
and than neutralize the stick (release back
pressure). A quick (small) push forward so you
unload the plane, but no pitch down or zero g's,
just natural. That is the end of the first
maneuver. Just lower the nose, accelerate and
recover level. Repeat until you smoothly pitch up
to 45 and neutralize the elevator quickly and
naturally (remember speed 140 max, 3,000' agl
and look for traffic).
The second lesson: Series of rapid left and right
banks while staying on a heading or point - Start
with 20 degrees and increase the bank angle
until you can smoothly roll rapidly back and forth
w/ out the heading going all over. This teaches
you to use larger stick deflections than usual and
not to put pitch inputs into it. We all tend to
bank, than yank. You don't do that when you
roll. In fact you may add fwd stick with full stick
aileron deflection as you get more advance.
"THE ROLL" combines the two lessons. Start at
Va (about 135-140 mph) with the pitch up, than
stick relaxed. One is your natural 45 pitch
attitude, smoothly apply a large (near full)
aileron deflection in the desired direction and
HOLD IT THERE until the world looks right again.
Left is easier due to engine torque. You can keep
your feet flat on the floor for beginners. Wrong
rudder inputs are worse than none. Quickly
neutralize the stick when you come around 360
degrees of roll level. You should be in a slight
nose low attitude, close to your original heading.
Recover straight and level. DONE
Cautions:
DONT RELAX THE ROLL INPUT. HOLD IT ALL THE
WAY. It's common to not to put enough aileron in
or neutralize it during the roll as it progresses to
the inverted. Now you're inverted, diving.
Lesson is keep the roll going by keeping the
aileron into it. Get in trouble keep rolling.
DO release the back pressure before you roll or
you'll do a Barrel Roll or worse. That's not what
you are after. Too much back pressure can
result in a dive or a Split-S. Speed can build
quickly in a dive. Remember your unusual
attitude recovery and pull the power back to idle
if you get pointed down and going too fast, roll
to nearest wings level and recover.
I described a basic beginner RV aileron roll, not
a perfect one. That's the beauty of the RV's,
they roll very nicely with no rudder due to the
Frise type ailerons. There's more to it, but this
should keep you out of trouble. You can enter
these maneuvers faster, but it requires more
skill and control. You can pull the wings of the
plane if you pull/push to hard at higher speeds.
Fly Safe, George
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