Author Topic: The P-51... And her flaps.  (Read 1266 times)

Offline Cthulhu

  • Gold Member
  • *****
  • Posts: 2463
Re: The P-51... And her flaps.
« Reply #15 on: January 26, 2009, 11:32:40 AM »
The nose up thing is kind of annoying if you are constantly dropping and dumping several notches of flaps...I dunno about you, but having to apply back-pressure on the stick is fairly natural, if I have to push forward on the stick to keep the nose from rising, all sorts of bounce and the gunnery goes to hell. Trim input takes time and finding the right key. I need more buttons so I can map one to trim I suppose.
Hey, I fly a Dora. The only time I drop flaps is to hopefully slow down below 200 before belly-flopping dead stick on to the runway.

But I know what you're talking about. You have scaled your stick to minimize nose bounce haven't you?
"Think of Tetris as a metaphor for life:  You spend all your time trying to find a place for your long thin piece, then when you finally do, everything you've built disappears"

Offline BnZs

  • Platinum Member
  • ******
  • Posts: 4207
Re: The P-51... And her flaps.
« Reply #16 on: January 26, 2009, 11:50:58 AM »
Hey, I fly a Dora. The only time I drop flaps is to hopefully slow down below 200 before belly-flopping dead stick on to the runway.

But I know what you're talking about. You have scaled your stick to minimize nose bounce haven't you?

I tried having it scaled for a long time, but it actually seems to work better for me unscaled. Except for GVing, I click the scaling back on to have smooth movement on the turret.

No, the bouncing difficulties I'm talking about come purely from fighting the nose pitching up tendency when I either don't have time or neglect to reach over and input alot of nosedown trim.
"Crikey, sir. I'm looking forward to today. Up diddly up, down diddly down, whoops, poop, twiddly dee - decent scrap with the fiendish Red Baron - bit of a jolly old crash landing behind enemy lines - capture, torture, escape, and then back home in time for tea and medals."

Offline RTHolmes

  • Plutonium Member
  • *******
  • Posts: 8260
Re: The P-51... And her flaps.
« Reply #17 on: January 26, 2009, 12:48:25 PM »
arent only the first notch or 2 supposed to be for manouvering on US birds and the rest for landing? the max speed you can deploy them should give an indication of what theyre for, any more than 2 in a jug or corsair feels more like an airbrake to me.
71 (Eagle) Squadron

What most of us want to do is simply shoot stuff and look good doing it - Chilli

Offline Cthulhu

  • Gold Member
  • *****
  • Posts: 2463
Re: The P-51... And her flaps.
« Reply #18 on: January 26, 2009, 01:07:24 PM »
arent only the first notch or 2 supposed to be for manouvering on US birds and the rest for landing? the max speed you can deploy them should give an indication of what theyre for, any more than 2 in a jug or corsair feels more like an airbrake to me.
You know, that's probably a good rule of thumb for all aircraft.
"Think of Tetris as a metaphor for life:  You spend all your time trying to find a place for your long thin piece, then when you finally do, everything you've built disappears"

Offline BnZs

  • Platinum Member
  • ******
  • Posts: 4207
Re: The P-51... And her flaps.
« Reply #19 on: January 26, 2009, 02:18:47 PM »
arent only the first notch or 2 supposed to be for manouvering on US birds and the rest for landing? the max speed you can deploy them should give an indication of what theyre for, any more than 2 in a jug or corsair feels more like an airbrake to me.

Flaps continue to minimize turn radius and lower the speed at which you can still hang into the air out to full...the thing about AHII vs. real life is that we have auto-retracting flaps and never have to worry about jamming/tearing them off at high IAS.
"Crikey, sir. I'm looking forward to today. Up diddly up, down diddly down, whoops, poop, twiddly dee - decent scrap with the fiendish Red Baron - bit of a jolly old crash landing behind enemy lines - capture, torture, escape, and then back home in time for tea and medals."

Offline Cthulhu

  • Gold Member
  • *****
  • Posts: 2463
Re: The P-51... And her flaps.
« Reply #20 on: January 26, 2009, 02:41:29 PM »
the thing about AHII vs. real life is that we have auto-retracting flaps and never have to worry about jamming/tearing them off at high IAS.
Same can be said for the F4U's gear.

Data says:
Max deployment speed:
Limit speed with gear down & locked:
250 kts
350 kts

But if I understand correctly, the F4U's gear can be deployed in-game at practically any speed. :huh But that's another matter.
"Think of Tetris as a metaphor for life:  You spend all your time trying to find a place for your long thin piece, then when you finally do, everything you've built disappears"

Offline SectorNine50

  • Silver Member
  • ****
  • Posts: 1331
Re: The P-51... And her flaps.
« Reply #21 on: January 26, 2009, 03:09:11 PM »
Same can be said for the F4U's gear.

Data says:
Max deployment speed:
Limit speed with gear down & locked:
250 kts
350 kts

But if I understand correctly, the F4U's gear can be deployed in-game at practically any speed. :huh But that's another matter.
That is because the F4U's had a dive brake setting on their landing gear that would only drop the front gear and would keep the tail wheel up.  You can drop the front gear at very high speeds but the tail wheel was a little more flimsy.  This is just an easy way to execute it in-game.
I'm Sector95 in-game! :-D

Offline Cthulhu

  • Gold Member
  • *****
  • Posts: 2463
Re: The P-51... And her flaps.
« Reply #22 on: January 26, 2009, 03:44:49 PM »
That is because the F4U's had a dive brake setting on their landing gear that would only drop the front gear and would keep the tail wheel up.  You can drop the front gear at very high speeds but the tail wheel was a little more flimsy.  This is just an easy way to execute it in-game.
You're correct that the mains only (and not the tail wheel) were lowered as dive brakes. That wasn't my concern. The gear could be lowered at relatively high speeds compared to other aircraft. I'm just wondering if it's not a bit excessive in AHII.

The following is from: http://homepage.eircom.net/~frontacs/WBStored/F4UGearAsDivebrakes.html

**************************************
"Got some more about F4U gear for you. All of the following is taken from the Air Ministry Pilot's notes for the Corsair I-IV for RAF and Royal Navy pilots."

Para 44 Flying Limitations

(iii) Dive Bombing

Maximum speed (u/c up)... ... ... ... 375 Knots IAS

Maximum speed for lowering u/c (dive brakes)... 250 KIAS

Maximum speed u/c down ... ... ... ... ... 350 KIAS

**************************************
It's obvious that the gear was incredibly strong once down and locked, but the max deployment speed is 100kts less. I know there are F4U Manuals out there for sale. Hopefully someone has one and can provide some clarification.
"Think of Tetris as a metaphor for life:  You spend all your time trying to find a place for your long thin piece, then when you finally do, everything you've built disappears"

Offline Bronk

  • Persona Non Grata
  • Plutonium Member
  • *******
  • Posts: 9044
Re: The P-51... And her flaps.
« Reply #23 on: January 26, 2009, 04:02:01 PM »
Dean's AHT
"The gear was not to be extended over 300 mph IAS or retracted over 400mph IAS."
See Rule #4

Offline Chalenge

  • Plutonium Member
  • *******
  • Posts: 15179
Re: The P-51... And her flaps.
« Reply #24 on: January 26, 2009, 05:02:22 PM »
Quoting Widewing:
Quote
It has nothing to do with E bleed in the Jug.

With full flaps, a P-47D-25 sustains a turning radius over 50 feet smaller than a P-51D with full flaps, as well as a faster rate of turn.

We've tested these individually and head to head. I've said it many times; the drag model update absolutely killed the P-51s and their ability to maneuver at speeds below corner velocity with flaps deployed. Anything more than 3 notches of flaps is virtually worthless. All you do is trade a small decease in radius for a big hit in turn rate.

http://bbs.hitechcreations.com/smf/index.php/topic,212053.105.html

page 8
If you like the Sick Puppy Custom Sound Pack the please consider contributing for future updates by sending a months dues to Hitech Creations for account "Chalenge." Every little bit helps.

Offline SectorNine50

  • Silver Member
  • ****
  • Posts: 1331
Re: The P-51... And her flaps.
« Reply #25 on: January 26, 2009, 09:34:16 PM »
Is widewing saying there is an error?  Or it was modified and corrected an error?
I'm Sector95 in-game! :-D

Offline Demetrious

  • Copper Member
  • **
  • Posts: 108
Re: The P-51... And her flaps.
« Reply #26 on: January 26, 2009, 11:44:29 PM »
CL increases, but Lift may or may not.
In other words, CL does increase with increased flaps, but like BnZ said, drag increases disproportionately, so unless you have huge additional power at your disposal

That'd explain why the Jug(s) seem to get so much mileage out of full flaps. That 2,000 HP Double Wasp has firepower to spare. I think. The Jug is underpowered as is.

Offline Stoney

  • Gold Member
  • *****
  • Posts: 3482
Re: The P-51... And her flaps.
« Reply #27 on: January 29, 2009, 12:30:45 AM »
I'd give my eye teeth for large flap deflections in AHII to cause nose-down pitching, instead of having to reach over the keyboard and input full nose-down trim once I get into a slow fight w/flaps.... :devil

http://bbs.hitechcreations.com/smf/index.php/topic,193021.0.html

I brought this up a couple of years ago.  Pyro said they were going to make a change, but nothing has happened...
"Can we be incorrect at times, absolutely, but I do believe 15 years of experience does deserve a little more credence and respect than you have given from your very first post."

HiTech