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Ed,
Nothing like a good spin, I love'em, no fear at
all - however not all Cessna are certified for spinning, so I found
out, Oops!
George ( down under)
----- Original Message -----
Sent: Thursday, October 22, 2009 8:14
AM
Subject: [FlyRotary] Re: off subject - RV
spin characteristics
Sound terrible
exciting, Dave. I found that even spinning a Cessna 150 was more thrilling
than I was interested in. So, I’ll stick to my engine out dead-stick landings
– easier on the heart (if not the seat cushions {:>)).
Ed
From:
Rotary motors in aircraft
[mailto:flyrotary@lancaironline.net] On
Behalf Of David Leonard
Sent: Wednesday, October 21, 2009 3:21
PM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: off subject - RV
spin characteristics
I have pretty well explored the spin characteristics
of my RV-6. Every RV is different. You never really got one going
in that video, not even a full rotation best I could tell. Mine are
different depending on whether I spin toward the normally heavy wing, or the
light wing. They are steeper toward the heavy wing and also steeper with
a pax. Much better toward the lighter wing - makes for a nice flat
spin. I have not tried aileron in the direction of spin - it is
fast enough without it.
Gradually approach the stall in level flight.
Some slight rudder and aileron to partly compensate for the heavy wing.
At stall buffet, throttle to idle, stick full aft and full rudder.
At first it is steep pitch down and bobble like what you show. After
about 2 turns it flattens out and the rate of turn increases. After
about 4-6 turns it is fully developed and the centrifugal force is quite
noticeable, turn rate seems about 1.5 seconds per rotation, pitch
down is about 20 deg. and I am loosing about 400 feet per rotation (the first
couple turns and last couple turns it is more than that). At about
6-8 turns I get oil pressure and fuel pressure low alarms from the
gas and oil all being flung outboard away from the pickups. That is the
farthest I take it.
It takes me 3-5 turns to get out of a fully
developed spin (before the spin develops, it is nearly instant). Start
with opposite rudder and stick to neutral, I have to forcibly hold the
stick in the neutral position. As the rotation slows and starts to
reverse direction I need to smartly but not too fast apply forward
stick. Too fast, and the elevator stalls and mushes. Too slow and
I have missed the window of opportunity and the spin reverses direction.
I can help by easing the rudder a little when the rotation is slow. The
Idea is to get the rudder and elevator flying again, then get the nose down
while flying strait. It is sort of a feel thing, but it is a little
scary, disorienting, and the trees are getting bigger and engine alarms are
going off. I did quite a few spins working up to this point. It
was a lot of practice getting used to the feel of the airplane and how it
responds and getting comfortable with the sights and
sounds.
Once that elevator catches, it pitches down and
out. I hold the pitch down a couple seconds because there is not power
from the engine yet and I want to keep it at idle while the oil system
re-pressurises.
Probably not really smart, but a whole lot of
fun.
Sorry I don't have any video. Anyone want to
come along and hold the camera?
On Wed, Oct 21, 2009 at 10:13 AM, kevin lane <n3773@comcast.net>
wrote:
one day I video recorded
what happens in my RV-6A when I attempt to stall/spin. with the stick
held full back and neutral, rudders neutral, power off, you can see the ride I
get. it is actually a lot more bouncy and shaking than the video
portrays. I would never do this with say, my wife, on board.
eventually the left wing drops a lot, speed picks up and the plane dives and
pulls up, ready to start this routine all over again. at this point I
give full right rudder to initiate a spin, recovering several thousand feet
below the 5000' starting altitude. I have tried the "flying leaf"
maneuvers [only rudder corrections to a stall] before, and again, never get
into a full stall.
note - RV spin
recovery requires neutral or forward stick along with opposite rudder.
this is not like the T-craft I learned to fly in. pushing the stick in
the direction of the spin will really wind it up. don't do this!
Van himself told me that! [afterwards] stick to 1 or 2
revolutions[ not 6], that's all Vans has ever tested.
kevin
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