Author Topic: Axis Flaps  (Read 4117 times)

Offline bozon

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Axis Flaps
« Reply #15 on: November 12, 2004, 07:16:48 AM »
Quote
Originally posted by Krusty
And Bozon, either way, there is still a burden of proof. Try doing research into the files and reports created by the test pilots and development crew. Perhaps test flight data, or flight comparisons, etc. No offense intended, I think I agree with you, but you may need to find proof before others agree.

Yeh, that's the problem.  I don't belive accurate or even not-so-accurate data, save some anacdotes, exists. I always make certain to note that it's only my opinion that I exspress.

I base my opinion on general aerodynamic plane behaviour. While my physics education is good, my specific aerodynamics knowledge is lacking. I have only a few flight hours, devided between several plane types and non include 'extreme' flying save the standard "stall" practise. But one thing my instructors stressed to avoid is stalling with the nose pointed high, full throttle and uneven wings - and that's with very weak, high wing, stable A/C.

I hope some of the true flight engineers and experienced pilots here can comment about how torque kicks in at near stall speeds and how "deep stall" and spins develop. From this perhaps, extrapulate the results to WWII very high powered fighters.

Bozon
« Last Edit: November 12, 2004, 07:21:58 AM by bozon »
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Offline Captain Virgil Hilts

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« Reply #16 on: November 12, 2004, 08:10:13 AM »
I really don't give a damn if you were here first, you're still wrong.

You CAN'T pull all the stick deflection you want in a P-38 and not snap roll, in fact, it WILL snap into an unrecoverable spin. You can snap roll and spin out while pulling straight back on the stick, and the real plane will NOT do that if both engines are running. If it is flying straight, it will NOT stall one wing first, it will simply quit flying and drop nose down. The AH P-38 WILL stall one wing first flying straight, with just back pressure on the stick.

Not only that, the AH P-38, even with two perfectly operating engines, suffers from torque effects in both stalls and spins. You often MUST pull the engines back to idle, and sometimes even shut them down, in order to recover from a spin. That is PURE Bravo Sierra, nothing more, nothing less.

Captain Stan Richardson Jr. USAF ret., was an advanced instructor in the P-38 with over 3000 hours in the plane. His job was to teach P-38 pilots to fly on one engine, to do advanced aerobatics, and to recover from stalls and spins. He took pilots up and taught them to force a P-38 to stall and spin. And he said FORCE was the word to use. In over 4 years of correspondence he has said repeatedly that you should NOT have to do ANYTHING to the engines to recover from a spin. Far from being ordered to avoid stalls and spins, Stan taught himself how to FORCE stalls and spins, and how to recover from them.

According to everything Stan has told me, not to mention Art Heiden, Don Rheimer, Bill Capron, and any number of other P-38 pilots, the P-38 spin model is completely wrong.

Oh, and it is easy to test the flaps. Go find the pilots manual and the test pilot data, and then fly the plane to see if it matches. The test pilot data reports and the pilots manual will tell you the speed at which the flaps can be deployed, and will also tell you what the stall speed is for each notch of flaps is. If you can duplicate that performance with the AH plane, then that is all the testing you can do. That tells you whether or not the flaps add the proper amount of lift.

The biggest single problem here is the expectation that U.S. planes should have the same stall and departure characteristics as the Axis planes, and that is simply wrong, for a very obvious and important reason.

Simply take a look at the basic design of the planes, and the thought process behind the planes.

With the possible exception of the P-51, U.S. planes were designed to be larger and heavier, to provide a rugged airframe. The solution to the added weight and mass was more horsepower and more directional stability.

The U.S. planes were designed specifically to be more stable and forgiving, at the cost of maneuverability. This makes them mush out before they depart in a nasty manner.

The Axis planes were designed to be light and agile, to have greater climb rates and be more maneuverable, they were designed to dogfight. They sacrificed directional stability in order to make the plane more maneuverable. This makes them tend to depart with a great deal less warning, and earlier than they would if they had more mass, more intertia, and more directional stability. They will be far less forgiving to any error in pilot input, no matter how slight. They also require the pilot to be much more attentive to catch the plane at the first hint of a departure.

The more maneuverable you make a plane, the less stable it becomes, because maneuverability comes from the lack of stability that allows a plane to make fast transient directional changes.

The problem with a less stable plane is that when it reaches the edge of its flight envelope, it becomes far less forgiving, and far more prone to spin out and snap roll.

As far as the P-51 and the P-47 responding like a P-38 at those speeds and under those circumstances, that's a crock. At least half the time I engage one of those planes and get them into a slow turning fight I'm able to easily break them down into a stall followed by a spin. And I'm a lousy pilot in AH.

A lot of U.S. fighter pilots I have either talked to or read the books and reports from have specifically mentioned exploiting the tendencies of Axis plane to depart or at least become unstable as speed dropped or maneuvers became more agressive. Bud Anderson and Erv Ethell come to mind rather quickly, as I remember Bud mentioning several times how he'd get a 109 to try to follow him in his P-51 knowing full well he'd get the 109 to depart sooner, and he could roll over and shoot him as he spun out. It was a favorite tactic of Erv Ethell in the P-38 as well. Both scored multiple victories over German planes specifically exploiting the exact thing that seems to be the complaint here, Axis planes being less stable than U.S. planes. Go figure.
"I haven't seen Berlin yet, from the ground or the air, and I plan on doing both, BEFORE the war is over."

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Offline Captain Virgil Hilts

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« Reply #17 on: November 12, 2004, 08:12:32 AM »
Oh, and by the way Kweassa, I DO fly in Aces High, some months as many as 40 hours or more. I've seen you online hundreds of times.
"I haven't seen Berlin yet, from the ground or the air, and I plan on doing both, BEFORE the war is over."

SaVaGe


Offline Crumpp

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« Reply #18 on: November 16, 2004, 08:14:47 PM »
The FW-190 had manuver flaps just like the P51 and P38.  At least according to the USAAF that tested it.





Not really.  It's flap settings were:

1. retracted
2. Take Off - 10 degrees (+/- 3 degrees)
3. Landing - 58 degrees (+/- 3 degrees)

It is obvious that they could be dropped while in flight and were used in combat.

The Flugzueg-Handbuch says they could be deployed anywhere below 500 kph.

They were certainly strong enough:



Crumpp

Offline Raider179

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« Reply #19 on: November 17, 2004, 01:42:12 AM »
Doesnt matter you will all meet the same fate at the end of my guns!

Offline humble

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« Reply #20 on: November 17, 2004, 11:51:10 AM »
Crummp....

you highlight the problem yourself....a 190 will spin out at just 2G's at moderate speed. The LW actually prohibited any type of "turn fighting" in the 190 in 44 below 2000M due to excessive pilot loss's due to spin in's. Even with flaps it will spin at 140....

Based on my limited time in the 190 I'd say the modeling in AH is very lienient in this regard.

Truekill.....

This is about the 100th time this garbage has been brought up. There is no "conspiracy"....simply the reality that different nations had different design goals....as for trying to turn a Ki-84 with an F4F....well thats a more fundemental problem related to varying capabilites in pilot choice....simply go back to hanger and pick "expertan" instead of "baby seal" and that will solve the problem.

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Offline TrueKill

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« Reply #21 on: November 17, 2004, 12:22:36 PM »
humble no1 was talkin to u so shut up...

and i just swiched to bish in the CT and looked at the planeset and allies dont have an F4F its the FM2 now i know y it was out turning me but y is it that the FM2 is labeled as the F4F??? HT could u change this so ppl dont get mixed up.

Offline humble

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« Reply #22 on: November 17, 2004, 12:59:31 PM »
F4F would of out turned you even better than FM-2. Basically you let the other guy drag you into the only fight he even had a chance to win. You had no business manuevering in plane with him at all....instead of blaming the plane go look in the mirror...even better go spend some time in the TA...

BTW....

The 190-8 was the worst turning of all the non "jabo" or "bomber killer" 190's...the 190 A4 was considered to be the best pure 190 fighter with the A5 not far behind...

You do a fine job of making yourself look kind of stupid...:aok
« Last Edit: November 17, 2004, 01:03:31 PM by humble »

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Offline TrueKill

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« Reply #23 on: November 17, 2004, 01:20:03 PM »
if i remember one of the pilots that crumpp talked to was an ace in the A-8 and HE said the 190A-8 was the best turning the the A's. i heard the most test records of axis AC where tested with (i could be wrong) 100 octain but the axis planes used different grade of gas and that would make the plane fly different.


and y do ppl say go spend time in the TA. i should go spend some time with u in the MA cuz it looks like u know everything huh

Offline StarOfAfrica2

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« Reply #24 on: November 17, 2004, 01:21:36 PM »
::sigh::

TK, you've been hangin with storch again havent you?

Offline humble

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« Reply #25 on: November 17, 2004, 01:33:25 PM »
Truekill.....

Trust me, 190-A8 was not a T&B bird at all. Basically its an up armoured A-6/7. The added weight hurt its handling and climb but made it more survivable vs Buffs. Later they went further and created an even more armoured A-8. This one actually had to be escorted by fighters to the bomber stream.

As for the suggestion regarding the TA.... Did the thought ever cross your mind that I'm actually trying to help you out? It's obvious that you have a lot of growing up to do, but you seem to enjoy the game...why not work on improving? In a place long ago far far away there once was a little snot nosed brat named Oopsey.....

Gee wonder what ever became of him:)....

As for me, I'm better than some and worse than others....

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Offline SlapShot

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« Reply #26 on: November 17, 2004, 03:27:59 PM »
Quote
Originally posted by TrueKill
humble no1 was talkin to u so shut up...

and i just swiched to bish in the CT and looked at the planeset and allies dont have an F4F its the FM2 now i know y it was out turning me but y is it that the FM2 is labeled as the F4F??? HT could u change this so ppl dont get mixed up.


The FM2 is an F-4F but with a different powerplant. They both turn the same and they both would have eaten your lunch in a turn fight.

A competent F4-F pilot (Sax) can easily chew up SeaFires and Spit Vs if not taken seriously. Even if a real decent pilot behind the stick of those Spits, the F-4F is still a viable threat.

I'll bet whoever was flying the F4-F/FM2 had more stick time in that plane than you had in the Ki-84 ... hence the beating.

Trimming elevators and using flaps in an F-4F/FM2 makes them real nasty in a turn fight ... heck ... trimmed elevators alone, without flaps, they will turn inside most planes with ease.
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Offline humble

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« Reply #27 on: November 17, 2004, 03:54:21 PM »
Truekill....

Tactics are both plane & position dependent....

The "right" move in one fight will get ya killed in another. When an experienced stick reads some of your comments its pretty clear your still on the the steep part of the learning curve. Plenty of folks will help you out if you ask........nicely.

Now, unless the F4F has bounced you with an awful lot of E he's fighting a difficult fight. The Ki-84 is faster & climbs better. In order to win the F4F has to draw you into a true turn fight. It's the only way he can win the fight against a pilot with any skill. Invariably the goal is/will be to set up a "reversal" kill....I'd almost bet he drew you into a decending right hand turn (that way engine torque with him on rev) throttle chopped and a bit of flaps...basically he's not slowing down (although he may be) but he's speeding you up...as you pull tighter and tighter he'll reverse ya nad catch you in the overshoot. Once your locked in if he's kept any speed you cant get out of range andhave to turn with him...and die.

The counter is really pretty simple....as you feel him drawing you in...roll 90 degree's away from his lift vector (basically arrow up thru his cockpit from floor)...and pull to vertical.

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Offline Crumpp

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« Reply #28 on: November 17, 2004, 05:03:19 PM »
Quote
Trust me, 190-A8 was not a T&B bird at all. Basically its an up armoured A-6/7. The added weight hurt its handling and climb but made it more survivable vs Buffs. Later they went further and created an even more armoured A-8. This one actually had to be escorted by fighters to the bomber stream.


You are correct BTW in that the FW-190 was an energy fighter.  It was however very agile and capable of holding it's own in the angle fight against any of the USAAF fighters.

There is NO difference at all in the armour between an FW-190A3 (late) and an FW-190A8 for the fighter variant.

Only armour changes to the FW-190A series for the fighter variant are:

1.  In the FW-190A3 the pilots headrest armour was widened and made thicker.

2.  In the FW-190A9 the oil cooler ring was made thicker.

FW-190A3:



FW-190A8:



Over it's lifecycle the FW-190A gained less weight and just as much power as the Spitfire did over it's wartime lifecycle.  No one claims the Spitfire became unwieldy.

The worst performing variant of the FW-190A series was the FW-190A5.  It gained lots of weight and NO horsepower over the FW-190A3.  The FW-190A8 on the other hand gained a little weight but added almost 300hp at 1st Supercharger gear FTH over the FW-190A5.  All the pilots I have interviewed who flew the FW-190A8 thought it was the most nimble varient of the FW-190A series.  There was a good reason the pilots were skeptical and did not relish giving up their Antons for a Dora at first.

Quote
you highlight the problem yourself....a 190 will spin out at just 2G's at moderate speed. The LW actually prohibited any type of "turn fighting" in the 190 in 44 below 2000M due to excessive pilot loss's due to spin in's. Even with flaps it will spin at 140....


Nowhere did the Luftwaffe prohibit turning.  In fact Galland did not like the fact the Luftwaffe emphasized turning as much as it did.  He wanted to move the JG's away from it.

You need to understand the effects of G's on turn performance.  Let me put it in perspective to help you.

At 140mph the Bf-109E was barely capable of pulling 2 G's.  It was very close to the stall when it reached that point.

The Spitfire MkI was better but not by much when it came to pulling 2G's while going as slow as 140mph.

Hope that helps to put the USAAF evaluation into better perspective.



I encourage you to educate yourself more on this subject.  Please take the time and join our foundation:

http://www.White1foundation.org

All donations are tax free.  We have a very extensive library of technical documentation which is available for our members to examine at the museum and by appointment.


Thanks Humble!

Crumpp
« Last Edit: November 17, 2004, 05:32:05 PM by Crumpp »

Offline humble

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« Reply #29 on: November 17, 2004, 06:22:56 PM »
According to US flight evaluations the 190 was clearly inferior to both the F4U and F6F with regard to turn performance and overall handling but superior to both in the climb. The stall came on very suddenly at 127 mph with no warning. That equates to 311 mph at 6G's at sea level. The plane also had a tremendous tendency to "flip" out on the pilot in a tight turn. This significantly limited its turn fighting capability's vs allied planes.

Obviously climb and roll are equal or more important to an accomplished E fighter than low speed turn and handling are. Simply pointing out to truekill that trying to "T&B" a 190 is a misuse of its strengths.

Kind of like trying to stall fight a F4F in a Ki-84:)

I'm certainly not trying to argue the "technical details" with an expert:)....

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