D9 compresses to early. Test and source given...

[Naudet]

...so there can be no doubt, that this must be fixed.

The text below is a passage from Kurt Tank-Focke Wulf’s Designer and Test Pilot, Wolfgang Wagner, ISBN 0-7643-0644-8
Tank does a brief flight test with a FW190D9 in this book, and this passage refers to the dive speed reached with the D9.

As you can see in the text, K. Tank mentions a dive speed off 700km/h IAS @6000 meter

that translates into

435mph IAS @ 19,672 ft.

also tanks mentions that there is no flutter, no vibration or any shacking of the plane.

I did two test dives, both from 28,000 feet, too copy K. Tanks test.

i timed the dive a bit wrong, so that i could only reach 400mph IAS @ 19k

but even at this speed, the D9 shook violantly.

I still was 35 mph away from Tanks speed, and you got the feeling the AH D9 rips apart in a few sec.

I did a second test this time reaching 400 mph IAS at 20K 8as you can see the timing is a bit hard), and again the bird shook wild.

So this time, i brought anything, a source and a test and so we have the prove that the D9 compresses to early. About 35-40 mph to early, and as the source says the D9 would reach 435mph IAS@19,672 feet without shaking.

This time HTC must fix this, it is proven.

[MANDOBLE]

A note, 190A8 speedometter had a top at 900 kmh, and not in "alarming" red colour.

7gs pulling out a dive at 900 km/h give a clear idea of how good control had this plane at hi speeds. Here, in AH, D9 is a stone at hi speeds and IMO, this is something that needs to be fixed ASAP.

Naudet, some of us tested several planes elev control at hi speed, the looser: G10, the second looser D9 and the uncontested winner the Typh (no compression at all diving from A1 to sea level in DA) seconded by the SpitIX.

Congrats for your findings Naudet, hope they wont be ignored.

[Karnak]

I have that book.

It'd be real nice to have the D-9 maintain its manuverability like the P-51 does.

[FLS]

IAS is just a pressure differential. Because of the shockwave that forms at very high speeds IAS isn't accurate.  It's also inaccurate in slow nose high flight because of the angle of the pitot tube to the airflow. I believe Hitech posted before that in AH IAS is accurate at all speeds and attitudes.

--)-FLS----
Musketeers

[Raubvogel]

Good stuff Naudet.

[Naudet]

FLS, now you will tell me K. Tank the designer of the FW190 didnt know that, at best he was one of the most genius aircraft designers of the 20th century and didnt know about IAS problems.

It is impressive how long some people try to discuss away facts.

If some allied silverbird jockey would bring up, that his test revealed his P-1234 is just a 6 mph IAS to slow at divespeed, the next patch would solve the problem.

But when i spent time testing, working through different sources, asking people that have even more sources, than someone jumps in and blaimes the results to inaccurated indicators.
LMAO

[FLS]

Naudet if your mind is made up I shouldn't bother you with facts.  

You might speculate on why there is no buffeting if the IAS is accurate.

--)-FLS----
Musketeers

[Staga]

So far Naudet has posted pretty good scan and tests and FLS has posted.. uhm what ?

[Naudet]

You might speculate on why there is no buffeting if the IAS is accurate.

FLS, so the point you are bringin in here is, cause there was no buffeting in Tanks dive with the D9 his IAS indicator were not accurate.

The impressive thing is that he flew a FW190A7 too in a test, he dove and reached the same speed.
Guess, both times the indicator was wrong.

As i understand you, you think HTC models the FW190 correct, and the statements of the FW190 designer are wrong?
If that is so, i doubt any damned number an allied plane managed in flight, cause as you stated, indicators are not accurate and so their numbers are wrong too.
Why HTC than still needs data?
If all tests are done with inaccurate indicators, all data is wrong. Point.

And to stop any further discussion of that point.

I did anything HT once mentioned.
I brought a source.
I made a test.
I made a comparison between test results and AH.
I found a difference.
I posted it.

And i trust my test and my sources.
For me the D9 in AH compresses to early. I have proven it.
It should be fixed.

[minus]

hmmm , long time a go  , in Warbirds ,:)  i remeber the Lw planes was maybe  not easy to fly but definitely  the have lot advantages aven above spitfires , beleve HTC  < pyro , HT whatever > dont have nothing negative vs Lw planes  but in WB many people givet wery strong  moral fedack on Lw planes , if remember corectly LWhiner  born in AH , and why in AH now  alied planes so dominating ? , in the beginin it was not like this !

i suspect all the  problem come  mostly from  crying out new ocean be the  < alied  wenies >   ,sory  but many of you react like ,,AW ,,  so must call you like this

sugestion  to al dear Lw fans , lets build some serious moral fedback , the real gilty are always hiden somewhere alse  , maybe is it not  realy HTC who make us unhapy

[AKSWulfe]

What Minus?

LW planes sucked donkey nuts in WB. They turned like stuffed pigs, burned E terribly quickly and couldn't do much more than die.

The D-9 in WB was not competetive at all, it could do two things. Hit and Run.

I dunno which WB you played, but the AH LW planes are leaps and bounds beyond what WB had when I played it.

And on top of all that, LW planes are highly competitive in AH. They aren't some super planes like many people(usually LW people) believe, the 109 was built for dogfighting/escorting. The 190 was built to be all around. Good at everything, excellent at nothing.
-SW

[minus]

hehe i played the old WB from 1.9 to 2,7 or something , stil have them on  cd somewhere all

 flyed mostly 190a8 and was skared only niki HO s , actualy flyed  FW becose no typhie was in WB , at this time i was in Raf 303 ,and mostly hury 1 dweb but somehow faled in love with 190:D


nothing scare me , only got upset in Lw  planes

[AKSWulfe]

Ah, I flew from CK .94 until WB2.0 (gave up after 2.0)... Man, if you guys flew the 190s and 109s of those days, you'd be convinced the 109s and 190s of AH are uber.
-SW

[Wilbus]

That picture Naudet added also states that it came all the way up in 700 km/h indicated, 955 km/h True acording to the note. That's is nearly 600 mph (593) true air speed, at that speed, AH D9 has compressed long ago.

Acording to this I am starting to think even the A modells in AH compress to easy.

[FLS]

Naudet

I made no statements regarding the accuracy of the FW190 in AH. I merely pointed out that IAS gauges are not really as accurate under all conditions as they are in AH. For that reason you can't compare the figures directly. What you posted so far gives the airspeed indicator reading without correction. You haven't proven anything by posting uncorrected IAS figures.
 
I have no bias for or against any aircraft in AH. I would like to see them all modeled as accurately as possible given the limitations of PC's.

Btw I flew your test and hit 450 IAS level at 19000 ft. At 435 IAS there was moderate buffeting. At 400 IAS there was no buffeting.

Wilbus

The 700kph figure is uncorrected IAS so the equivilent TAS would also be inaccurate. At 19500 ft the IAS at 435 IAS could easily be 35 mph higher than the true IAS. Since the AH IAS is true IAS the 400mph IAS with no buffeting that resulted in my test could be correctly modeling the test that Naudet posted.

--)-FLS----
Musketeers