Control input during loop

I must admit, for years I have been doing such but never asked why. Why do I
need to use left rudder to keep the nose straight during a loop? I have a US
airplane, with normal prop rotation. If I do not use left rudder, the nose
will yaw to the right. This is not due to P-factor?
Thx in advance.
VL

Because of the speed? Is this occuring at faster than normal cruise? I
don't do aerobatics .. but will notice the ball slipping a little to the
left on my Tiger if I get the speed way up over cruise in a descent.
How much angle is built into the vertical stabilizer?

"MLenoch" wrote in message
...
I must admit, for years I have been doing such but never asked why. Why
do I
need to use left rudder to keep the nose straight during a loop? I have a
US
airplane, with normal prop rotation. If I do not use left rudder, the
nose
will yaw to the right. This is not due to P-factor?
Thx in advance.
VL

"Roger Tracy"

Because of the speed? Is this occuring at faster than normal cruise? I
don't do aerobatics .. but will notice the ball slipping a little to the
left on my Tiger if I get the speed way up over cruise in a descent.
How much angle is built into the vertical stabilizer?


Cruise is 220 kts and loop entry is at 270 kts. The left rudder is required
only when G-pull is initiated, but not during the dive. The vertical stab has
a few degrees, not sure of the exact number.
VL

Fuel load balanced?


"MLenoch" wrote in message
...
"Roger Tracy"

Because of the speed? Is this occuring at faster than normal cruise? I
don't do aerobatics .. but will notice the ball slipping a little to the
left on my Tiger if I get the speed way up over cruise in a descent.
How much angle is built into the vertical stabilizer?


Cruise is 220 kts and loop entry is at 270 kts. The left rudder is
required
only when G-pull is initiated, but not during the dive. The vertical stab
has
a few degrees, not sure of the exact number.
VL

The left rudder is required only when G-pull is initiated, but not
during the dive.

Gyroscopic precession is my guess. Pulling the nose up causes a yaw
to the right.

In article , Greg Esres
wrote:

The left rudder is required only when G-pull is initiated, but not
during the dive.

Gyroscopic precession is my guess. Pulling the nose up causes a yaw
to the right.

Correct.

220 and 270?!?! Criminy, what are you flying? The only thing I can think
of is what one person said about being past the trimmed airspeed of the
rudder, which is probably trimmed for no yaw at 220 or thereabouts. I don't
think it's to do with prop effects as this is backwards from what your prop
would do. How many Gs do you pull to start your loop?

Shawn
Pitts S-1D G-BKVP
"MLenoch" wrote in message
...
"Roger Tracy"

Because of the speed? Is this occuring at faster than normal cruise? I
don't do aerobatics .. but will notice the ball slipping a little to the
left on my Tiger if I get the speed way up over cruise in a descent.
How much angle is built into the vertical stabilizer?


Cruise is 220 kts and loop entry is at 270 kts. The left rudder is
required
only when G-pull is initiated, but not during the dive. The vertical stab
has
a few degrees, not sure of the exact number.
VL

In article ,
"ShawnD2112" wrote:

220 and 270?!?! Criminy, what are you flying? The only thing I can think
of is what one person said about being past the trimmed airspeed of the
rudder, which is probably trimmed for no yaw at 220 or thereabouts. I don't
think it's to do with prop effects as this is backwards from what your prop
would do. How many Gs do you pull to start your loop?

You pitch down you yaw left, just like raising the tail during takeoff,
a pitch up should give some yaw to the right due to precession.

--
Dale L. Falk

There is nothing - absolutely nothing - half so much worth doing
as simply messing around with airplanes.

http://home.gci.net/~sncdfalk/flying.html

220 and 270?!?! Criminy, what are you flying?

Not sure what he's flying now, but the last time I saw Mr. Lenoch fly, he
was in a P-51D Mustang.
--
Jay Honeck
Iowa City, IA
Pathfinder N56993
www.AlexisParkInn.com
"Your Aviation Destination"

Wouldn't he kinda know what the inputs for a loop were if he were flying a
Mustang? Or at least have a more qualified contact to ask than a random
shot in a newsgroup?

"Jay Honeck" wrote in message
news:kzumb.24688$Tr4.49151@attbi_s03...
220 and 270?!?! Criminy, what are you flying?

Not sure what he's flying now, but the last time I saw Mr. Lenoch fly, he
was in a P-51D Mustang.
--
Jay Honeck
Iowa City, IA
Pathfinder N56993
www.AlexisParkInn.com
"Your Aviation Destination"