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I have sim setup for clear weather with all recommended A2A settings. I have saitek rudder pedals correctly centered but when starting the take-off run it immediately begins to yaw left and ends up going sideways down the runway! Just can't control the run. I have no diffculty in dozens of other aicraft. Hope someone can help.

Cheers Tony C

This isn't other aircraft, unless of course in reference to another A2A warbird.

Check that once you roll out onto the threshold, that you allow the P-51 to roll a short distance forward to straighten up the tail-wheel - and then lock from castoring by easing the stick all the way back against the stop.

Anticipate the yaw left when applying power, and apply the power in a smooth continuous fashion, not halting or jerking it. ~46hg of manifold pressure is plenty for take off, full power against the forward stop is excessive, and will need a lot of rudder pedal deflection to counteract the torque yaw.

Don't attempt to fly the tail into the air early with forward pressure on the stick; as this will rob you of steering from the tail-wheel - instead; allow the tail to fly up on it's own, or until the rudder gains authority at around 50+knots.

John.

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~ Make love to the sky, don't shag it.

And don't forget to set the rudder trim as described in the manual. It'll help a lot.

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Everyone has done a great job describing how to properly take off. The P-51 and other single high powered prop aircraft have a tendency to turn in the direction of the prop at high power. The key is being ahead of the curve rather than trying to fight it after the fact.

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Thanks for the advice. A2A Spitfire take-off, flying and landing fine. After destroying half a squadron of P51s I can finally get into the air and land. I find it hard to believe that the margins between a successful take-off and a smoking wreck are so small. This would mean that the P51 was more dangerous than an ME-163 and I don't believe that for a second

Well, considering that your information on the problem is very sparse, we don't know what your procedure is to tell you if that's the problem or not. If you're finding a "razor thin" margin, then most likely you've got either something set wrong or your procedures need to be modified to give you reliable results.

If you can post a video of takeoff or screenshots showing how you have things (like rudder trim and your realism settings) configured and a description of your procedure, maybe we can help figure out what's going on.

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I now have the P51 Mustang operating manual and the advice there that the 6 deg of rudder trim should wholly compensate for the torque certainly shows me that something was wrong with my set-up. I have now experimented with various settings including FSUIPC controls configuration and found that I can get something near a consistent take-off with rudder config slope set to -6 in FSUIPC. Don't know if this will be the final setting but at least I can get off the ground (and land fairly sweetly I might add ) without crashing and burning on a regular basis.

As for the rest of my procedure it is all as recommended in the A2A manual and P51 Operating manual.

The 6 deg of rudder trim is more for the climb trim whilst in climb power, so you still need to use a good portion of rudder on your takeoff roll.
Don't be fooled into making loads of controller changes to have the yaw on takeoff completely absent, as in you don't physically have to move your rudder pedals, it's all been "Trimmed out" by various controller changes etc. That sounds to me like it would just cause you serious problems later on.
I'm no expert, but like I've said, the 6deg of trim is more for the climb, as opposed to cancelling out the yaw due to power setting on take off.

Hope this helps a little

Matt

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"Poets have been mysteriously silent on the subject of cheese"
- G.K. Chesterton.

i7 2600K, 8GB Vengeance RAM, Asus P67, GTX 580.

I think this is being covered over here we now have 3 post about this lol

viewtopic.php?f=94&t=30254

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Ron
B-17 AIRFRAME 710 HRS PLUS AND CLIMBING




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TRACKIR 5 & TrackClipPro

Yeah it's more of a handful than say, the Spitfire. If your doing a take-off with a short delay, I find that holding the brakes, rev up to about 35", release the brakes, and then bump it up to take-off power @ 61" helps things initially (less jolting). Keep the stick slightly back to lock the tail wheel, and let the plane almost come off the tail wheel on it's own while focusing on keeping the aircraft centered. That is, if you don't do it already. You can do it in one continuous motion, but it takes a little more work.

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I take your point about too much controller fiddling but the original USAAF P51 operating manual does say

"Keep the airplane in a 3-point attitude until you have plenty of airspeed. In a normal take-off, the rudder trim tab is sufficient to make the torque almost unnoticeable"

That was very far from where I started and I still need fair amount of boot.

Tony

It seems to me that the P-51, most of all, is teaching people that the rudder is the 3rd set of flying controls, alongside the aileron and elevator.

Use the rudder as much as is necessary. They are not footrests, and never were.

Best regards,
Robin.

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A2A/AccuSim. 'nuff said!

Remember that in the real aircraft you will still deflect the rudder pedals, and that the trim simply reduces the loads from the pedals.

Best regards,
Robin.

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A2A/AccuSim. 'nuff said!

Tony,

Written FOR pilots BY pilots..."unnoticeable" is not the same as "none". In this context it means "no more than you would usually expect."...and that is if you are a high performance aircraft pilot. "Feel" on the pedals is what is missing from the simulator. As Robin has said...the trim reduces the load, not the "travel". In a real aircraft you can sometimes have to put on a heap of rudder pressure without actually moving the rudder very far...in the simulator the only way to get this "feel" translates is to require the rudder pedals to be moved a long way through their travel.

Darryl

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...Some say he never blinks, and that he roams around the woods at night foraging for Merlin parts...

This is the fun of Accusim !

In Il2-Sturmovik 1946 I really really enjoyed taking off and landing the ME109.

The Mustang is a teddy bear by comparison - talk about a swing to the left on take-off !

Had to be very active on those rudder pedals or else !

I read there was a high amount of accidents on take-off and landing with this plane.

I read in stick and rudder about how the air whacks into the tail on tail draggers and I read somewhere else about that and the ME109.

This is the fun of realism !