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 Post subject: Takeoff tips?
PostPosted: Tue May 29, 2012 3:31 am 
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Technical Sergeant

Joined: Mon Nov 19, 2007 4:20 pm
Posts: 571
Location: Oregon
Hey everyone!
I'm having such a blast with the Mustang. I'm learning little quirks here and there each flight I have. One thing I am trying to figure out is on my takeoff rolls. After taxiing onto the runway I'll get lined up straight and then advance the throttle slowly and smoothly. The strange thing is that at first my Mustang is veering pretty hard to the right for a while. Once the torque from the engine kicks in it will pull to the left. My best guess is that it has something to do with where I've left the tailwheel. So far from where I've flown from I've always entered the runway with a right turn. Maybe I haven't pulled forward far enough and let the tailwheel straighen out. Has anyone else had the same thing happen? Either way, it sure is fun trying to figure this stuff out! :mrgreen:

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 Post subject: Re: Takeoff tips?
PostPosted: Tue May 29, 2012 3:54 am 
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Joined: Sun Jan 30, 2011 3:39 pm
Posts: 985
Mine does the same- I first figured the initial pull to the right was due to required rudder trim. Even after straightening the tail wheel and rolling forwards a few yards I still got this pull. Try to take off like it is a video game you played before- get in front of every little thing it will do and counter it. My takeoffs are dead straight after just yesterday and today for practice...

Not sure if my explanation makes sense, but use the rudder from the second you advance the throttle- control it from the start and you can control the whole takeoff...

Joe

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 Post subject: Re: Takeoff tips?
PostPosted: Tue May 29, 2012 4:00 am 
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Airman First Class

Joined: Mon Feb 14, 2011 8:06 am
Posts: 84
She do veer to the right in the beginning. I guess that's because we set the rudder trim to 6 deg right before take off. If I remember correctly the wop II version did this too.
One way to do it is like Scott did in the tutorial video, hold the brakes until 35 MP an then let go.

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 Post subject: Re: Takeoff tips?
PostPosted: Tue May 29, 2012 6:59 am 
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Technical Sergeant

Joined: Sun Feb 24, 2008 9:33 am
Posts: 768
Location: Germany
One thing is for sure: I'm hitting the limits of what I can do with a twist grip rudder with this bird. ;)

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 Post subject: Re: Takeoff tips?
PostPosted: Tue May 29, 2012 8:25 am 
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A2A Chief Pilot
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Joined: Fri Mar 27, 2009 8:31 am
Posts: 1832
Location: East Coast United States
flyboy4612 wrote:
Hey everyone!
I'm having such a blast with the Mustang. I'm learning little quirks here and there each flight I have. One thing I am trying to figure out is on my takeoff rolls. After taxiing onto the runway I'll get lined up straight and then advance the throttle slowly and smoothly. The strange thing is that at first my Mustang is veering pretty hard to the right for a while. Once the torque from the engine kicks in it will pull to the left. My best guess is that it has something to do with where I've left the tailwheel. So far from where I've flown from I've always entered the runway with a right turn. Maybe I haven't pulled forward far enough and let the tailwheel straighen out. Has anyone else had the same thing happen? Either way, it sure is fun trying to figure this stuff out! :mrgreen:


Two things involved here.
The slight right swerve at the beginning of the takeoff I believe is an FSX quirk that has affected other aircraft as well. Once you get used to it you anticipate it and it's easily countered with a tad of rudder.
The rest of it is simply getting used to proper technique in handling a tail wheel prop fighter.
In the real Mustang, you DO have to line up properly and get that tail wheel nice and straight so it locks properly with the stick aft of neutral. Easily done, you just line it up and let it roll a few feet before you brake.
Best technique with a Mustang is to power up to no more than 40 inches initially, hold the stick just aft of neutral to gain advantage from the tail wheel, let the airplane stabilize and don't force the tail down. Let the tail come up naturally as you keep it lined up with whatever rudder the aircraft is telling you it wants. A little tricky is watching the manifold pressure peripherally as you power on up to takeoff power. Don't over boost with 100 octane. 55 inches is fine.
Don't allow the nose to get lower than the end of the runway horizon line and let it fly itself off.
Dudley Henriques


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 Post subject: Re: Takeoff tips?
PostPosted: Tue May 29, 2012 11:09 am 
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Airman

Joined: Wed Feb 09, 2011 6:12 pm
Posts: 39
Location: Porto Alegre, RS - Brazil
I'm having hard times with rudder taking-off on this P-51. It's really dificult to mantain a straight run, and I mean some feet to the left/right from centerline. I always end up on grass. :oops:
And my landings are...well, don't know if I can call it a landing. Well, it's a challenge and I accept it! :mrgreen:
Back to practice.


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 Post subject: Re: Takeoff tips?
PostPosted: Tue May 29, 2012 12:05 pm 
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Joined: Fri Mar 27, 2009 8:31 am
Posts: 1832
Location: East Coast United States
maubrenta wrote:
I'm having hard times with rudder taking-off on this P-51. It's really dificult to mantain a straight run, and I mean some feet to the left/right from centerline. I always end up on grass. :oops:
And my landings are...well, don't know if I can call it a landing. Well, it's a challenge and I accept it! :mrgreen:
Back to practice.


You can to some extent play around a bit with your rudder sensitivity and null settings in FSX or in your rudder pedal software if you have that, but you're right. Getting the Mustang off the ground doing it right takes a bit of practice.
Hang in there. You'll get better :-)
Dudley Henriques


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 Post subject: Re: Takeoff tips?
PostPosted: Tue May 29, 2012 9:30 pm 
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Senior Master Sergeant
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Joined: Tue Jan 04, 2011 10:24 pm
Posts: 1849
Location: California, United States of America
Dudley Henriques wrote:
flyboy4612 wrote:
Hey everyone!
I'm having such a blast with the Mustang. I'm learning little quirks here and there each flight I have. One thing I am trying to figure out is on my takeoff rolls. After taxiing onto the runway I'll get lined up straight and then advance the throttle slowly and smoothly. The strange thing is that at first my Mustang is veering pretty hard to the right for a while. Once the torque from the engine kicks in it will pull to the left. My best guess is that it has something to do with where I've left the tailwheel. So far from where I've flown from I've always entered the runway with a right turn. Maybe I haven't pulled forward far enough and let the tailwheel straighen out. Has anyone else had the same thing happen? Either way, it sure is fun trying to figure this stuff out! :mrgreen:


Two things involved here.
The slight right swerve at the beginning of the takeoff I believe is an FSX quirk that has affected other aircraft as well. Once you get used to it you anticipate it and it's easily countered with a tad of rudder.
The rest of it is simply getting used to proper technique in handling a tail wheel prop fighter.
In the real Mustang, you DO have to line up properly and get that tail wheel nice and straight so it locks properly with the stick aft of neutral. Easily done, you just line it up and let it roll a few feet before you brake.
Best technique with a Mustang is to power up to no more than 40 inches initially, hold the stick just aft of neutral to gain advantage from the tail wheel, let the airplane stabilize and don't force the tail down. Let the tail come up naturally as you keep it lined up with whatever rudder the aircraft is telling you it wants. A little tricky is watching the manifold pressure peripherally as you power on up to takeoff power. Don't over boost with 100 octane. 55 inches is fine.
Don't allow the nose to get lower than the end of the runway horizon line and let it fly itself off.
Dudley Henriques


Is redline okay with 130 octane fuel?

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 Post subject: Re: Takeoff tips?
PostPosted: Tue May 29, 2012 9:50 pm 
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A2A Chief Pilot
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Joined: Fri Mar 27, 2009 8:31 am
Posts: 1832
Location: East Coast United States
pjc747 wrote:
Dudley Henriques wrote:
flyboy4612 wrote:
Hey everyone!
I'm having such a blast with the Mustang. I'm learning little quirks here and there each flight I have. One thing I am trying to figure out is on my takeoff rolls. After taxiing onto the runway I'll get lined up straight and then advance the throttle slowly and smoothly. The strange thing is that at first my Mustang is veering pretty hard to the right for a while. Once the torque from the engine kicks in it will pull to the left. My best guess is that it has something to do with where I've left the tailwheel. So far from where I've flown from I've always entered the runway with a right turn. Maybe I haven't pulled forward far enough and let the tailwheel straighen out. Has anyone else had the same thing happen? Either way, it sure is fun trying to figure this stuff out! :mrgreen:


Two things involved here.
The slight right swerve at the beginning of the takeoff I believe is an FSX quirk that has affected other aircraft as well. Once you get used to it you anticipate it and it's easily countered with a tad of rudder.
The rest of it is simply getting used to proper technique in handling a tail wheel prop fighter.
In the real Mustang, you DO have to line up properly and get that tail wheel nice and straight so it locks properly with the stick aft of neutral. Easily done, you just line it up and let it roll a few feet before you brake.
Best technique with a Mustang is to power up to no more than 40 inches initially, hold the stick just aft of neutral to gain advantage from the tail wheel, let the airplane stabilize and don't force the tail down. Let the tail come up naturally as you keep it lined up with whatever rudder the aircraft is telling you it wants. A little tricky is watching the manifold pressure peripherally as you power on up to takeoff power. Don't over boost with 100 octane. 55 inches is fine.
Don't allow the nose to get lower than the end of the runway horizon line and let it fly itself off.
Dudley Henriques


Is redline okay with 130 octane fuel?


130 octane you can use 61 inches
100 octane, use 55 inches. Chance of high temps and detonation over that manifold pressure.
METO for climb remains the same. Use 46 inches and 2700 RPM
DH


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 Post subject: Re: Takeoff tips?
PostPosted: Wed May 30, 2012 1:04 am 
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Airman Basic

Joined: Wed May 30, 2012 12:59 am
Posts: 3
Awesome plane, really.

Coming from jets I still have to manage the proper technique on takeoff. Right now I´m running out of rudder-authority on takeoff. The slight yaw to the right is easily countered, the initial yaw to the left as well. But then I can´t stop the bird from veering to the left until leaving the runway/skidding oround/crashing - even with full right rudder.

Zero Wind, moderate power, stick initially slightly aft. Rudder trim 6 degrees to the right before takeoff. Anything I can try?

Thanks


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 Post subject: Re: Takeoff tips?
PostPosted: Wed May 30, 2012 5:24 am 
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Posts: 1832
Location: East Coast United States
flash1 wrote:
Awesome plane, really.

Coming from jets I still have to manage the proper technique on takeoff. Right now I´m running out of rudder-authority on takeoff. The slight yaw to the right is easily countered, the initial yaw to the left as well. But then I can´t stop the bird from veering to the left until leaving the runway/skidding oround/crashing - even with full right rudder.

Zero Wind, moderate power, stick initially slightly aft. Rudder trim 6 degrees to the right before takeoff. Anything I can try?

Thanks



It sounds like a power rate problem to me; bringing up the power too fast.

A takeoff in a Mustang (if done correctly) is a lesson in blending in the power at exactly the right rate to match the developing dynamic pressure on the control surfaces and the rate at which you are allowing the tail to come up.
It's truly a marriage of these factors. Arriving early with any one of them will cause the forces combining to yaw and roll you left to become dominant.
Done correctly, you begin by advancing the power SLOWLY to no more than 40 inches. Let the aircraft accelerate with the stick just back of neutral enough to lock the tail wheel. As you feel (see in the sim) the tail start to rise, be ready with the rudder response. At this point if done right instead of dancing the rudder you will be applying just the right amount of right rudder to counter the left turning forces. As speed increases you will be needing to blend in right aileron as well for torque since torque is a roll correction.
While all this is going on you should have slowly eased up the remaining power to either 55 inches if using 100 octane or 61 if you are rich enough to afford the 130 :-)
The entire thing is done in a single fluid motion. It takes practice to get it just right.
One thing that will help you remember about the takeoff in a 51. If you did it right, you just about had time to get to takeoff power before you reached rotation speed.
Good luck, and don't forget that aileron. You'll notice a slight roll to the left as you rotate if you did, and be careful. The A2A Mustang has been programmed for torque roll. Yank it off early at low speed and high
angle of attack and you could snap left and end your day!
Dudley Henriques


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 Post subject: Takeoff tips?
PostPosted: Wed May 30, 2012 2:10 pm 
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Airman
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Joined: Mon Sep 07, 2009 3:35 pm
Posts: 23
Location: Emmen, The Netherlands
Dudley thanks for your comprehensive comment and explanation on the P-51 take-off!
I am sure we all will benefit! I also struggled with the take-off not a clue what happend under the 'bonnet'
I am sure there quit a few challenges to come along the way in mastering the Mustang!




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 Post subject: Re: Takeoff tips?
PostPosted: Wed May 30, 2012 4:04 pm 
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Airman Basic

Joined: Wed May 30, 2012 12:59 am
Posts: 3
Thanks for the advice. In my case the reason was the rudder-deadzone-setting for the X52. Adjusted that one and now I can even stay on the rwy during t/o :lol:


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