Spitfire F.IX - speed and climb

[juzz]

Spitfire F.IX

All tests conducted at 100% fuel, 2x20mm & 4x7.7mm, "WEP" power.
Data in brackets supplied from the tables here.

Speed

4000ft: 323mph IAS, 350mph TAS (326mph)
8000ft: 320mph IAS, 370mph TAS (344mph)
12000ft: 315mph IAS, 385mph TAS (363mph)
16000ft: 303mph IAS, 400mph TAS (383mph)
20000ft: 285mph IAS, 400mph TAS (378mph)
24000ft: 275mph IAS, 415mph TAS (390mph)
28000ft: 260mph IAS, 420mph TAS (409mph)
32000ft: 230mph IAS, 405mph TAS (395mph)
36000ft: 200mph IAS, 385mph TAS (377mph)

Climb

MS gear: 3800fpm@13000ft (3860fpm@12600ft)
FS gear: 3000fpm@24000ft (3020fpm@25200ft)


Speed is significantly faster, varying from 8-26mph in excess of the Boscome Down(B.D) figures. I suspect that the TAS indicator is actually at fault here. A rough conversion of the IAS listed would probably give TAS closer to the B.D figures.

Climbrate is virtually identical to the B.D figures, with only a slight difference in critical altitude. The critical altitudes for speed are also close to the B.D figures. However, the critical altitudes for MS/FS gear could vary by several thousand feet in the real aircraft, so these values are somewhat arbitrary anyway.

[RAM]

Juzz,is a thing long known here, look if you see any chart of the SpitIX in the Plane section...wondered why there is none?.

I,for me, dont mind the extra speed of the Spiftire, I think that we have a mix of LF and HF spitfire here, not the "F" Pyro says.

Its good for ballancing a 1942 plane to 1944 standards. Still you have to hear people saying that SpitfireIX is not good enough...  
Good post, juzz. Lets see what do RAFwobbles   say now.

[This message has been edited by RAM (edited 08-22-2000).]

[Vermillion]

LOL!! I had forgotten that the Spit IX was outta wack for a F model

And RAM, tsk tsk tsk

 

Good post, juzz. Lets see what do RAFwobbles  say now.

You have to learn the proper terminology my friend  

They are not RAFwobbles!!

They're more properly known as SPITDWEEBS!  

Or you can just call em NancyBoys as I like to think of them  


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Vermillion
**MOL**, Men of Leisure
"Real Men fly Radials, Nancy Boys fly Spitfires"

[StSanta]

Or what SAW calls them; RedCaps  

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StSanta
JG54 "Grünherz"
"If you died a stones throw from your wingie; you did no wrong". - Hangtime

[jmccaul]

"RAFwobbles"

I feel deeply insulted that the RAF don't even get there own derogatory nickname next thing you know we'll get a mustang IV instead of a spit 14 or tempest  

[mx22]

Call me as you want, but as people in Russia used to say:

Luftwaffe pilots dont even need crosses on their graves

 

mx22

[Nashwan]

All those figures are from the tests of early Spit IXs using a max of 15 lb boost, iirc. The Spit in AH uses 18 lb boost, as did the vast majority of Spit IXs.
Compare the climb in AH with the climb for either the LF or HF SPits and you will see they are better than the one we have here.

[Pongo]

Spitler Youth

[funked]

What Nashwan said.  The famous AFDU comparison was done the same way - the Spit was using less than full power while the Fw 190A-3 was in WEP.

[Citabria]

I wish HTC would give us  achart of the spitIX climb and speed.

[juzz]

The only thing incorrect is speed. Not critical altitudes or climbrate. What I was trying to determine was whether the Spitfire F.IX in Aces High actually does reach those TAS, or if it is a bug with the ASI.

Now for some stupidity...

AFDU: 21k, Spit IX and Fw 190A-3 equal.
AH: 21k, Fw 190A-5 415mph, Spit IX 400mph(at +18lbs). UH OH! Not only is it way slower, but that AFDU Spit was only running at +15lbs. Maybe the Fw 190A should only do 400mph. Or if you use the B.D figures, 378mph.

AFDU: 21k, Fw 190A-3 25mph faster than Spit V.
AH: 21k, Spit V 370mph, Fw 190A-5 415mph.
UH OH! That Mk V should be doing 390mph, in reality. Either that, or the Fw 190A should do 395mph.

Seems we have a problem.

Solutions?

1. Speed up the Spitfires by about 10-15mph.
2. Slow down the Fw 190A by about 10-15mph.

So what will it be?

[This message has been edited by juzz (edited 08-22-2000).]

[RAM]

 

Originally posted by juzz:

Now for some stupidity...

AFDU: 21k, Spit IX and Fw 190A-3 equal.
AH: 21k, Fw 190A-5 415mph, Spit IX 400mph(at +18lbs). UH OH! Not only is it way slower, but that AFDU Spit was only running at +15lbs. Maybe the Fw 190A should only do 400mph. Or if you use the B.D figures, 378mph.

AFDU: 21k, Fw 190A-3 25mph faster than Spit V.
AH: 21k, Spit V 370mph, Fw 190A-5 415mph.
UH OH! That Mk V should be doing 390mph, in reality. Either that, or the Fw 190A should do 395mph.

Seems we have a problem.

Solutions?

1. Speed up the Spitfires by about 10-15mph.
2. Slow down the Fw 190A by about 10-15mph.

So what will it be?

It will be what we have now...

Happens that the 190A that we have at AH is an A5 with a BMW801D-2 instead a BMW801C <G>

Plus, the A3 tested there had a derated engine ,making the tests still more questionable  

Is it clear now?  

     

[This message has been edited by RAM (edited 08-22-2000).]

[Fishu]

370mph spit vs. 385mph 190? sounds like Spit V vs. 190A-8 to me.
Fw190a-5 was way faster, over 400mph at that altitude.

[funked]

A-2 was the last 190 with 801C engine.

The "derated engine" is nonsense - the manifold pressures and RPM used were the WEP rating for the 801D.

[This message has been edited by funked (edited 08-22-2000).]

[Pyro]

Try again without WEP.



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Doug "Pyro" Balmos
HiTech Creations