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FM/DM threads Everything about FM/DM in CoD

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  #1  
Old 04-10-2011, 02:12 PM
zipper
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In the movie the OP is using ailerons so he's not actually doing snap rolls. A snap roll is just a horizontal spin, entered at a slower speed by grabbing full elevator while kicking full rudder snapping the rudder-side wing into a stall (I usually jam on the juice at the same time for more control authority - it MUST RASPECT THA AUTHORITEH).

I don't have CoD so I can't comment on it, but 1946 didn't model initial roll rate, all aircraft reach their maximum roll rate in the same amount of time (something like 1/2 second - I haven't timed it). So a P-47 with no ammo or ordinance reaches its max roll no quicker than a P-47 with ammo and a pair of 500 pounders. In the stalls the CG feels like it backs up about six feet -lol- no further comment.
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  #2  
Old 04-11-2011, 02:07 PM
JG27_PapaFly JG27_PapaFly is offline
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Quote:
Originally Posted by zipper View Post
In the movie the OP is using ailerons so he's not actually doing snap rolls.
He does use ailerons, but there's also the pitchup expected from a snaproll. It does look like very decent snaprolls, and the timing is exactly like in the real plane.
Many RL aerobatics pilots use some amount of ailerons, depending on the aircraft, and on whether it's an inside or outside snap. Usually you want your ailerons to go in the direction of the snap, as a little rolling momentum before the stall will help increase alpha on the dropping wing, which will stall faster.

Check out this extra300:


Fact is that there are aspects in IL2FB that I like very much: propwash, torque and gyroscopic forces are there, shielding effects are modeled (fully forward elevator shields rudder nicely in an upright spin, accelerating it), adverse yaw is there, i can flatten or accelerate/decelerate spins at will.
I have the impression that not much is missing to really allow unlimited style aerobatics. I hope this will be possible, and that the SU26 will be added and functional unlimited-style

Last edited by JG27_PapaFly; 04-11-2011 at 02:10 PM.
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  #3  
Old 04-11-2011, 04:15 PM
BlackbusheFlyer BlackbusheFlyer is offline
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Quote:
Originally Posted by JG27_PapaFly View Post
Fact is that there are aspects in IL2FB that I like very much: propwash, torque and gyroscopic forces are there, shielding effects are modeled (fully forward elevator shields rudder nicely in an upright spin, accelerating it), adverse yaw is there, i can flatten or accelerate/decelerate spins at will.
I have the impression that not much is missing to really allow unlimited style aerobatics. I hope this will be possible, and that the SU26 will be added and functional unlimited-style
I understand that desire, but aero's in CoD are really nothing like the real thing, for one thing you have no seat of pants feel to correctly coordinate top rudder, particularly at high G. Really it is a piece of cake in IL2. Personally I think if you want to do competition unlimited aerobatics go rent a Pitts or an Extra as it is worlds apart.
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Old 04-12-2011, 05:38 PM
zipper
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Quote:
Originally Posted by JG27_PapaFly View Post
He does use ailerons, but there's also the pitchup expected from a snaproll. It does look like very decent snaprolls, and the timing is exactly like in the real plane.
Many RL aerobatics pilots use some amount of ailerons, depending on the aircraft, and on whether it's an inside or outside snap. Usually you want your ailerons to go in the direction of the snap, as a little rolling momentum before the stall will help increase alpha on the dropping wing, which will stall faster.

X

Fact is that there are aspects in IL2FB that I like very much: propwash, torque and gyroscopic forces are there, shielding effects are modeled (fully forward elevator shields rudder nicely in an upright spin, accelerating it), adverse yaw is there, i can flatten or accelerate/decelerate spins at will.
I have the impression that not much is missing to really allow unlimited style aerobatics. I hope this will be possible, and that the SU26 will be added and functional unlimited-style

Wow, neat vid - I wouldn't call that a classic snap roll, though (I'm an old-school old guy). Maybe a competition sorta snap roll thingy - lol.

I had one guy show me how he rolled AWAY from the snap direction to get a quicker stall break - like a Corsair or Hellcat on a doomed-to-the-drink wave-off.


Anyway, some people are saying the propwash effect on the ground for tail planting and steering is less than stellar, but I haven't heard anything about it in flight. Is the adverse yaw consistent between different aircraft types, as some definitely had it worse than others. I was of the opinion the Spit had very little to none, for instance (adverse yaw isn't good for a gun platform). And in most of the planes I've spun (none a dedicated stunter, mind you) forward elevator got me out of the spin quicker than I could notice anything else - lol.
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  #5  
Old 04-12-2011, 09:07 PM
Romanator21 Romanator21 is offline
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Look at 1:58 for the snap roll in the Hayabusa. It's possible to do this in Il-2, but it's not as sharp. It's hard to time the exit (I end the roll about half a turn too early or too late) and the plane wallows around a bit and ends in a nose down attitude. It looks very sloppy overall, but it can be done.

I've attempted it a few times and maybe I'll post the track later. Considering our hardware, I would still say that this isn't bad.

Regarding stalls, you have to ignore the little blue HUD message. It does not indicate a stall, but a deep stall or spin. I have done proper power-on, power-off stalls in Il-2 without the "Stall!" message appearing.

But considering how much the IL-2 FM changed since its inception, I would not be worried about CoD too much. I think the team has enough on its plate already to worry about fixing FMs for now.
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  #6  
Old 04-13-2011, 06:51 AM
JG27_PapaFly JG27_PapaFly is offline
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Quote:
Originally Posted by Romanator21 View Post
That is exactly the vid i was talking about! Yepp there's a full snaproll at 1:58, and a half-snaproll to inverted flight at 2:26.
As I've stated in my first post,it's impossible to fly these maneuvers nearly as crisp in IL2FB. Both entry and exit are way too sluggish.
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  #7  
Old 09-04-2011, 10:12 AM
lion737 lion737 is offline
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The Dora 9 did snaproll without rudder or aileron. If in a turn the stick was pulled hard it snaped exactly 180 degrees. This has often been used in a defensive position.
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  #8  
Old 09-04-2011, 06:24 PM
NedLynch NedLynch is offline
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I know it's not really a snap roll, but try this:
Stick to the front and left fully and full opposite rudder.
Works especially well in a 109 for me and you don't ned to be flying slowly to execute.
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