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Author Topic: F4U's torque  (Read 1179 times)

Offline Simaril

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F4U's torque
« Reply #15 on: September 20, 2005, 04:49:01 PM »
Whiskey, I love the soccer avatar! You make it yourself?
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Offline Wolf14

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F4U's torque
« Reply #16 on: September 20, 2005, 05:17:19 PM »
go to http://www.Zenoswarbirdvideos.com and watch the F4U training video. alot of useful information that will help you understand the plane and how to handle some of the things it does.
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Offline Deth7

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F4U's torque
« Reply #17 on: September 20, 2005, 05:37:54 PM »
When I land a corsair I kick the rudder to the right (set it to neutral) doesn't swerve at all.  Combat trim has it left to counteract the torque.  J&L keys are rudder on keyboard or should be unless remapped.
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Offline Whisky58

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F4U's torque
« Reply #18 on: September 20, 2005, 06:20:04 PM »
Quote
Originally posted by Simaril
Whiskey, I love the soccer avatar! You make it yourself?


Thanks, but I wish m8.
Check out spacespider.net.
:aok
Rugby's my game - I could never do that with a footy :D
Regards
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Whisky

Offline Wilbus

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F4U's torque
« Reply #19 on: September 20, 2005, 06:38:05 PM »
Whisky you may be right but I've never heard anything like that before.

MrRipley, doubt it is a bug. It's been around since th F4u was released more or less, think they would have spotted and fixed such a bug by now.
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Rasmus "Wilbus" Mattsson

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Offline lasersailor184

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F4U's torque
« Reply #20 on: September 20, 2005, 06:56:17 PM »
The trick to landing all airplanes is the C and V keys. Set them to be left and right brakes.

Do I have to say it any more clearly?
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Offline TracerX

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F4U's torque
« Reply #21 on: September 20, 2005, 07:23:04 PM »
Quote
Originally posted by peregrin
The ground loop isn't necessarily cause by engine torque or p-factor etc.  Even low torque tail draggers have a ground loop tendancy.  The distance between mains and the tail wheel may be the most important factor for stability.


peregrin is the most correct here, although Wilbus is correct in pointing out that P-factor is the reason that the F4u always tends to start the ground loop to the right.  The most significant factor is that the F4U has a very short moment (distance) between the front wheels and the tail wheel.  All short fuselage tail dragging airplanes have the same problem, most notably is the Folker Dr.1 from WW1.  Even the reproductions are very difficult to land even with differential braking.
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Offline Martyn

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F4U's torque
« Reply #22 on: September 20, 2005, 07:37:28 PM »
A friend of mine's father died just after the war when his Corsair ground-looped. He was an experienced pilot - but it was known to be dangerous.
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Offline Widewing

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F4U's torque
« Reply #23 on: September 20, 2005, 08:02:34 PM »
Well, since the revised FM of AH2 came along, the F4Us are far less prone to ground looping.

Nonetheless, I strongly suggest 3 pointing your landings and maintaining backpressure on the stick while braking. Do this and you'll never suffer another ground loop.

My regards,

Widewing
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My regards,

Widewing

YGBSM. Retired Member of Aces High Trainer Corps, Past President of the DFC, retired from flying as Tredlite.

Offline Whisky58

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F4U's torque
« Reply #24 on: September 21, 2005, 04:36:55 AM »
Sorry to flog this one but it was niggling me & thought it might be of interest to us weekend physicists.

I dug out some old notes.

There are 4 forces tending to yaw a plane on t/o.

1. Reactive force.  See my contribution above.

2. Slipstream effect.  Beautifully described by Wilbus.

3. Gyroscopic precession.  Spinning mass of propellor & engine makes them subject to this effect.  If a force is applied to a spinning gyroscope, the gyroscope acts as if the force were applied at a point 90 deg to the direction of rotation.  When nose goes down on take-off gyroscopic precession pushes nose to left.  Those old enough to remember toy gyroscopes spinning on bits of string will know what I mean :)

4. P-factor (asymmetric blade effect).  In a tail dragger the downward moving prop blade has a higher angle of attack & thus produces more thrust.  When props rotating clockwise (as viewed from cockpit) this yaws plane to left.

Corsair scores badly on all these because

1. Big rotary engine (1 & 3)

2. Big diameter prop (2)

3. Tail dragger (4)

P38 suffers little from yaw on take off 'cos inline contra-rotating engines & horizontal AoA (tricycle u/c) on take-off.

Regards
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Whisky

Offline Wilbus

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F4U's torque
« Reply #25 on: September 21, 2005, 05:18:56 AM »
Very nice Whisky, more factors then I thought and I am a hobby pilot (then again I am a glider pilot so don't have to worry about those factors :D )
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Rasmus "Wilbus" Mattsson

Liberating Livestock since 1998, recently returned from a 5 year Sheep-care training camp.

Offline SirLoin

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F4U's torque
« Reply #26 on: September 21, 2005, 06:16:17 AM »
Took me years(lol) took figure out the best way to plop down a hog..

Use the tail hook...:D


Seriously,map the left and right brakes in case after landing you get careless with your taxi to the rearm pad.

Come in full flaps,gear down and get thing as slow as you can(100mph or less) and do a 3 point landing...with the stik pulled all way back on landing to lock tail wheel.

:aok
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Offline Wilbus

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F4U's torque
« Reply #27 on: September 21, 2005, 07:19:37 AM »
Rgr Sirlion same thing as I do. If it is done that way I get no sway. If I land some other and get sway I have left/right differential toe brakes on the pedals, they can help alot :D
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Rasmus "Wilbus" Mattsson

Liberating Livestock since 1998, recently returned from a 5 year Sheep-care training camp.

Offline Enduro

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F4U's torque
« Reply #28 on: September 21, 2005, 09:41:31 AM »
Great input, everyone.  Thanks!  :)
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TBolt
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Offline scott123

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F4U's torque
« Reply #29 on: September 21, 2005, 02:59:33 PM »
I never do a 3 point landing in he F4U!!! always land on the main gear and let the tail settle,You should have no problems landing,.this was how pilots would have been taught during wwII.I  stress do not attempt 3 point landing.it's possible but not the best way,and makes a ground loop more likely.;)
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