Author Topic: 190A5 deck speed  (Read 4671 times)

Offline Pyro

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190A5 deck speed
« Reply #45 on: June 15, 2004, 04:30:59 PM »
Quote
Originally posted by Wotan
It’s not just a matter of rlm data, there’s conflicting rlm data as well.

Not only may our A5 end up with a worse climb rate (see mando's current 190a vs. Spit thread) but it may end up slower at alt.

Pyro is saying he will take multiple data points and work through the inconsistencies. That doesn’t mean the A5 he ends up with will match the chart posted here.

If you believe that the AH a5 will match the chart posted you are most likely setting your self up for some disappointment.



No, I was talking about using that data provided that nothing jumps out that raises a problem.  I speculate that the disappointment will come from AH matching those charts, not vice versa.

Offline Wilbus

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190A5 deck speed
« Reply #46 on: June 15, 2004, 06:36:21 PM »
I kind of like them now as it is, I just consider it weird that the spits out accelerate them, but the spits outaccelerate most planes I've fought in AH2 so far.

190's as they are now feel good IMO not in any way uber but a clear improvement from AH1 (together with some other planes). Both the A5 and D9 feel more like fighters, the A8 feel heavy as it should do.

Spit the only plane I have an issue with right now, was able to catch a 3k P38 before almost right after take off when he made an attack and tried to zoom away from my spit 9. Was surprised my self that I kept up with him so good.

Pyro, a question though, the F8, I only tried it for one sortie (will try it more tomorrow) but it felt alot lighter then the A8, almost underweight... may have been fuel or something else, but felt like it was turning better then it maybe should.
Rasmus "Wilbus" Mattsson

Liberating Livestock since 1998, recently returned from a 5 year Sheep-care training camp.

Offline Wotan

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190A5 deck speed
« Reply #47 on: June 15, 2004, 06:58:26 PM »
vv gotcha pyro

Just for the heck of it I ran a 20k test of the AH 2 A-5 and compared it to the chart Godo posted.

Start - u. Notleistung (Takeoff & Emergency)

Godo's Chart

@ 6100m (20k) = 655kmh = 407mph

AH 2

@ 6100m (20k) = 649m = 403 mph

Steig - u. Kampfleistung (Climb & Combat)

Godo's Chart

@ 6100m (20k) = 625km/h = 388mph

AH 2

@ 6100m (20k) = 634 km/h = 394 mph

For the AH 2 test the fuel multiplier was set @ .01 and I used a 127 mph rising wing to jump up to 20k. I then slected no wind and leveled at 20k (closer to 20015). I took 2 x 20 mg151 and 2 x 20 mgff, So basically the A5 had full weight during my quick test.

Offline Crumpp

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190A5 deck speed
« Reply #48 on: June 15, 2004, 08:11:40 PM »
Pyro,

Thanks for taking the time to answer.

I think the "problem" with the 190's flight model is not neccessarily gounded in the charts.  It may not even be the 190's flight model but rather other A/C are out of balance.

Correct me if I am wrong on the following assumptions:

1.  Flight Models are no longer just a set of numbers that are straight forward to adjust.  They are in fact complicated sets of data that adjusting the parameters can have unforeseen consequences on other flight characteristics.  It is much more difficult than simply adjusting a few key strokes to achieve the desired effect.

2.  No FM is such a simulation will ever EXACTLY match the actual A/C data.  A certain "margin" of error is not only acceptable but rather becomes a certainty.

Being an aficionado of "simulations" I want things as close to the actual data as possible but am willing to accept a margin of error either way.  I say adjust the FW-190 data to as close to the Luftwaffe Specs as possible BUT I for one do not think the AH 190's are at this time a good simulation of the 190 as a fighter.  

This opinion is based on the following as already posted in the "190A8 vs Spit" thread to another player.  

==============================================

   As for the clipped wing Spits. It helped reduce the rollrate and improved low altitude performance but it was not the answer to the FW-190A. That distinction went to the Griffon powered Spits

http://www.wwiitech.net/main/britain/aircraft/spitfire/

------------------------------------------------------------------------------------

 Obviously therefore, steps had to be taken immediately to counter this new and very dangerous threat. One of the first steps was to clip the wings of the Spitfire V's, thus improving their low-altitude capability enough to be able to rival the Fw-190. This was not however, an adequate upgrade, and it was clear that a new model would be required. This came in the form of the Spitfire Mk IX. The Spitfire IX appeared with all three types of wing; the extended, standard and clipped wing, and also introduced a new armament configuration; a combination of two 20mm Hispano cannon and two .50-inch Browning machine guns. The Mk IX did not solve the problem of the Fw-190, but when combined with new Hawker Typhoon aircraft, did help the situation. The Mk IX was fitted with a higher-powered version of the Merlin, the Merlin 61, rated at 1,660hp. 5,665 Spitfire Mk IX's were produced. The Mk X was powered by a 1,650hp Merlin 77 engine, and the Mk XI was powered by either a 1,760hp Merlin 63, or a Merlin 70 rated at 1,665hp.

-----------------------------------------------------------------------------------

      The data I have says the two A/C are pretty close in the initial climb with the Spit IX leaving the 190 behind at high altitude.

    Some food for thought on the combat value of the marginal advantage the Spit 9 did have:

    Being a lower wingloaded A/C the spit will climb at a slower speed and steeper angle. It will end up above the FW-190 at the end of the climb.

    The FW-190 climbs at a faster speed and shallower angle. If the spit follows directly it will be left behind. This was the case in Dogfights between the two.

    The Spitfire pilot climbs at his best speed. He is above the 190 but now must close the Horizontal gap so he dives.The 190 pilot simply dives too. The spitfire cannot catch him in a dive and worse case will follow him to the deck were the 190's top speed is greater. End result - 190 retains the advantage in the fight.

   This is why Spit pilots didn't fight 190's in the vertical. The 190's roll advantage, zoom climb, and speed leveled the playing field making the deciding factor pilot skill.

  You don't see this in AH at all. The Fw-190 is reduced to clumsy easily avoided attacks in the vertical. It does not posses the manuverability advantage of the actual FW-190. FW-190 pilots got in close and fought in the verticle because they had some real manuvering advantages. Try the classic 190 manuver of turning until the Spit begins to gain in the turn, flick out of the turn circle, dive and zoom climb above. The AH2 spitfire 9 will follow you with no difficulty and shoot you down. Test pilots with radio communication anticipating the manuver COULD NOT follow a 190 in the Merlin Spit. Even the Spitfire Mk 14 had great difficultly WITH radio notification following a 190A in this manuver.

    AH2 is not a correct simulation of the fighting between these great fighters. Facts are the 190 was MORE manuverable than the Spitfire 9 in flight with the exception of sustained turn radius.

    Do not confuse advantages with domination. The Griffon powered spits DOMINATED the 190A. In the Merlin powered Spit IX niether dominated the other in reality. Each had it's advantages and the checks and balances between the two leveled the playing field. It should be one of the most nail biting fights in the game given equal energy states at the merger.

==============================================

Many great facts and details about the handling characteristics of the 190 can be found in these documents:

http://prodocs.netfirms.com/

Nashwan posted this link in another thread.  It's the same allied test flight info I have. Try to reproduce these test's in AH.  

I do have several performance charts on the 190 that I have not seen posted in these forums.  They will posted on Mandobles site this week.

Crumpp

Offline Crumpp

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190A5 deck speed
« Reply #49 on: June 15, 2004, 08:27:34 PM »
Your right Niklas it does come from the Focke Wulf Factory Test Flight however in Nazi Germany the entire Aircraft industry fell under and was administered by the RLM.  


Think of the RLM as the German equivilent of the FAA in the United States only with better lookin uniforms.

:)

When refering to RLM I mean it is German Data from German trained personnel on German Designed equipment for German soldiers/sailors/airmen to use.   Thanks for keeping me straight.

Crumpp

Offline Pyro

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190A5 deck speed
« Reply #50 on: June 16, 2004, 02:23:36 PM »
Hi Niklas, my email is dougb@hitechcreations.com.

Crumpp,

It's not that we can't match numbers, it's that there aren't a full spectrum of numbers to match.  Numbers can be hit with some precision, subjective judgements can't be.  Hitting the limited numbers that I have to work with doesn't mean the model is correct overall, but if I'm completely missing then it's obviously incorrect.

On your Spit vs FW climb hypothesis, it's a good theory but it's based on an assumption rather than a fact.  That assumption being that the Spitfire has a lower best climb speed, when in reality they are about the same, around 170 mph.

Offline Crumpp

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190A5 deck speed
« Reply #51 on: June 16, 2004, 07:58:59 PM »
Pyro,

Take a look and let me know if my assumptions are correct.

Take as an example the P47 test.  The P47 handily outclimbs the FW190 in a sustained climb.  

In zoom climb though the FW190 has a real advantage.  Both A/C start off at the same altitude, speed, and are side by side.  When they pull up the FW-190 ends up 1500 feet (497 meters) above the P47.  If the 190 continues the climb then the P47 will quickly catch him.

The FW-190 must have had a terrific zoom climb cause according to Robert Johnson's (in his P47) encounter with a Spit in a mock dogfight he ended up outzooming the spit and using a hammerhead to get a gun solution on the spit.  The spitdriver couldn't catch him.  Are you familiar with the encounter I am refering too?  His experience is also backed up by the RAF tests.

While there is no mathimatical graph there certainly is hard data.  

An undeniable fact is these are approved Air Force test's conducted by Air Services at war in order to come up with tactics to defeat an enemy.  According to Eric Brown in his "Wings of the Luftwaffe" the RAF had numerous examples of the FW-190 after Faber's. So many flying examples of 190's that Faber's 190A3 was tested to destruction to determine how much damage had to be inflicted to destroy a 190.  He mentions 2 FW-190A4's, an FW-190A5, FW-190G1, and a couple of FW-190A8's.  These were all flown by the test flight during the war.  If at any time the RAF's recommendation to its pilots in fighting the 190 changed during any version of the Merlin powered spits then I am sure the RAF would have implemented the change.

The RAF did not recommend any of it's Merlin powered spits to "mix it up" with any 190A.  It recommended pilots "fly at high speed" in areas the 190 operated in as this would give them the "best" chance to shoot down a 190.  When the Griffon powered spits came on the scene the RAF changed this recommendation to now pilots can afford to "mix it up" with 190A's.  

The 190 vs Merlin powered spit was a fight decided by pilot skill.  Each plane had it's advantages and it's disadvantages but niether one dominated the other.  In AH Merlin powered spits dominate the 190A's.  Try reproducing the RAF test flight results.  
190A drivers should welcome a Merlin powered spit fight as an even match up.  Instead in the CT arena you have massive crying everytime a spit is introduced into it's historically correct line up.  


I think based on the facts before me that the 190 must have had the advantage in zoom climb, roll rate (manuverability), and accelleration, especially in the dive.  All these add up to advantages in the close in energy "knife" fight which is exactly the style of fighting the Luftwaffe practiced in FA-190's according to Brown.  To Quote Capitan Brown:

==============================================

 "A somewhat odd form of Dogfighting developed with the FW-190 pilots endevoured to keep in the verticle plane by using zooms and dives while their spit mounted antagonist tried everything in the book to draw them on to the horizontal.  If the German pilot lost his head and failed to resist the temptation to try a horizontal pursuit curve on a spitfire, as likely as not, before he could recover his speed lost in steep turn he would find ANOTHER spitfire turning inside him.  On the other hand, the German pilot who continued to zoom up and down was usually the recipiant of difficult deflection shots of more than 30 degrees.  The FW-190 had tremendous initial accelleration in a dive but was extremely vunerable during a pullout. recovery, having to be quite progressive with care not to kill the speed by "sinking".

==============================================

This is pullout observation is backed up by Focke Wulf test pilot Heinrich Beauvais in Dietmarr Herman's "FW-190A An illustrated History of the Luftwaffe's Legnedary Fighter" in which a transitioning 109 pilot "Schmitt" was unable to get the 190 to loop at any speed.  Whenever he pulled up on the stick the 190 would simply nose up and then fall off to the side and stall out.  It never would "fly" through a loop.  Beauvais took Schmitt's 190 up and flew it through a loop at just above stall speed.  He then explained to the transitioning 109 pilot that the stick forces were much less and to use gentle pressure.  After that Schmitt had no problem flying perfect loops.

As a simulation fan I want our 190A as close to the real one as is possible with all of it's strengths and weaknesses.  As a fighter it did dominate Spit Mk V, was equal to the Merlin powered Spit Mk IX and it was itself dominated by the Griffon powered spits.

Lastly, Pyro, thank you for taking the time to look at this issue.  I know you guys are busy.  Keep on truckin with Tour of Duty I'm looking forward to checking it out.

Crumpp

Offline GScholz

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190A5 deck speed
« Reply #52 on: June 16, 2004, 10:13:23 PM »
Quote
Originally posted by Crumpp
Take as an example the P47 test.  The P47 handily outclimbs the FW190 in a sustained climb.  


Huh?





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Offline Crumpp

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190A5 deck speed
« Reply #53 on: June 16, 2004, 10:29:06 PM »
Gscholtz,

We are talking about the wartime allied test flight documents which the original papers are available for examination.  

Thanks though because this graph does not match the actual flight test either.  It is contrary to the real thing.  Wonder why?  I was thinking that the P47 the USAAF used the paddle blade prop.  Think they list the setup of each A/C in detail.  Need to check it.

Crumpp

Offline Crumpp

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190A5 deck speed
« Reply #54 on: June 16, 2004, 10:56:36 PM »
The P47D4 used in the test with Water Methynol injection had some real advantages at low altitude including a better sustained climb rate.  However the high you went the better FW-190A became vs the P47D4 and at 26000 feet the P47's only option was to dive away from a 190A.  
Unusual.  The 190 is generally better at lower altitudes and is not a good high alt fighter.

Pyro,

I misquoted that test after I reread it.  The FW-190 still has a definate zoom climb advantage.  It leaves the P47D4 in the first 1500 feet and not a 1500 foot seperation.  Then the sustained climb rate of the P47 takes over and it outclimbs the 190.  

So it is not as dramatic an advantage as it seemed at first but still one nonetheless.

The zoom climb, roll rate, and accelleration of the 190 make it a great energy dogfighter.

Crumpp

Offline GODO

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190A5 deck speed
« Reply #55 on: June 17, 2004, 10:43:53 AM »
Quote
Originally posted by Pyro
That assumption being that the Spitfire has a lower best climb speed, when in reality they are about the same, around 170 mph.


Take a look at 190D9 Va, it may be well above 169 mph at sea level.

D9 speed

Offline Crumpp

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190A5 deck speed
« Reply #56 on: June 17, 2004, 08:17:09 PM »
Pyro,

Are you sure about that climb speed?

According to the performance charts I have seen put the 190A5's climb at around 285 kph on Military Power at 2400U/min at 1.32 ata. from sea level until 3400 meters.  So the Spit IX and the 190A5 had the similar climb speeds with the 190 averaging a few miles per hour faster provided the 190 was not using C3 boost.

Now the rate of climb drops dramatically over this altitude range from a peak of 16M/sec at around 1 km to  12.5M/sec at 3400 meters.

Shaws information holds up with the Spit (lower wingloaded) being a few miles an hour slower if it tried to follow the 190 directly in a climb and both A/C started at the same energy level Provided the the 190 driver didn't drop below his best climb speed.

Just a guess but I bet this will not hold true at altitudes the Spit is faster and accellerates better.

Crumpp

Crumpp

Offline F4UDOA

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190A5 deck speed
« Reply #57 on: June 17, 2004, 10:32:35 PM »
The best climb speed of the 190A5 tested by the Navy was 160Knots or 184MPH.


Offline Crumpp

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190A5 deck speed
« Reply #58 on: June 17, 2004, 11:26:38 PM »
That great stuff F4UDOA!  Thanks bro.


You wouldn't happen to have a copy of enclosure 3, the power settings for this test would you?

No doubt about it, the 190 climbed at a faster speed and shallower angle than the Spitfire.

Crumpp

Offline GODO

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190A5 deck speed
« Reply #59 on: June 18, 2004, 09:35:06 AM »
184mph for A5, about 182mph for D9 and, depending on the source, 170 or 160mph for SpitIX.

That 190A5/U4 had reduced armament, only two MG 17 and two MG151/20 but also with two reconnaissance cameras.
« Last Edit: June 18, 2004, 09:38:15 AM by GODO »