CORRECTED Updated OTD speeds for fighters with 1.10s

[Mister Fork]

Let me also point out that unless the acceleration of each of these planes are fixed, the top speed is a useless piece of data.

Great, the Dora, La-7, and Tempests are speed demons. But how long does it take for them to get to that speed.  The Dora and the TA-152's top speed was drag limited.  With WEP on, both could get to top speed in 2 minutes flat.  The 152 was known for it's amazing accleration rates above 15000 ft at cruise. The Tempest was the same - speed demon low on the ground and could accelerate like nothing you've ever seen.

IMHO, until acceleration rates are fixed, top speeds are useless.

[joeblogs]

as I thought the boosting system on these planes was only really effective at higher altitudes....

-Blogs

Originally posted by Fancy
I like how both the Dora and the Ta-152 jump up about 5 or 6 places when you add WEP.  This might be a worthy little print-out to tape to the side of my monitor.

[LLv34_Snefens]

"The Dora and the TA-152's top speed was drag limited."

Isn't top speed drag limited for all planes?

Which boosting system? MW50 was only useful BELOW 6km.

[Soda]

Mister Fork,
  Before you make a statement like "acceleration is wrong", you should really show test some numbers.  You claim things like "top speed in 2 minutes flat", though I have no idea where you got those values from.  Wherever you got them, it would have been smart to show how the model was wrong.

Anyway, all that said, if you'd run some tests you would be surprised to find that you aren't far off.  I have the La7 numbers (I did run the tests) and here you go.

From a start (air-start, not ground start) at 137mph (power-off stall slight stall).  Light fuel, sea-level:

La7 gets to 90% of top speed in 1 minute (137mph-> 340mph)
La7 gets to 98.5% of top speed in 2 minutes (137mph-> 373mph)

The last 5mph or so takes another 30 seconds or so to achieve.

You can claim you want the start point to be slower, but the La7 puts on over 8mph/second at low speed, and that's as low as my tests allowed so might be better.  I have other test numbers for planes like the Mossie too, and at different altitudes but maybe you should take the time to test them before making a statement like you did in your post.

-Soda
The Assassins.

[whels]

bump

[whels]

Originally posted by whels
MIL:
TEMPEST 372
LA-7 358
F4U-4 358
TYPHOON 355
YAK9-U 355
P-51D 354
F4U-1 350
P-51B 347
190D-9 346
F4U-1D 343
F4U-1C 342
109G-10 337
LA-5 336
P-38L 333
P-47D-11 333
SPIT-14 332
TA-152 332
P-47D-25 329
P-47D-30 329
190A-8 327
YAK9-T 327
190F-8 326
190A-5 326
MOSQ 325
C205 321
109G-2 320
F6F-5 320
109G-6 317
N1K2 313
109F-4 310
SPIT IX 310
C202 307
KI-61 305
110-G2 305
SEAFIRE 293
SPIT V 293
110-4b 290
FM2 290
A6M5 288
F4F  278
P40B  275
A6M2 275
P40E 276
HURR IIC 262
HURR IID 253
HURR I 253

WEP:
TEMPEST 386
LA-7 380
F4U-4 378
190D-9 375
TYPHOON 370
P-51D 367
109G-10 366
TA-152 361
SPIT-14 358
F4U-1 358
P-51B 358
F4U-1D 357
F4U-1C 356
LA-5 356
YAK9-U 355
190A-8 349
190F-8 349
P-38L 344
P-47D-11 344
P-47D-25 340
P-47D-30 340
109G-2 340
190A-5 339
MOSQ 338
YAK9-T 336
109G-6 336
109F-4 332
C205 331
F6F-5 330
N1K2 324
SPIT IX 319
110-G2 316
C202 315
KI-61 313
SEAFIRE 302
SPIT V 302
110-4B 300
FM2  297
P40E 297
109E-4 292
SPIT I 291
A6M5 288
F4F  275 no wep
A6M2  275 NO WEP
P40B 275  
HURR IIC 273
HURR IID 265
HURR I 261



whels

bump

[brady]

TY Whels, I make great use of this chart from time to time.

[Soda]

Whels,
  I could never figure out how the F4F (since it has no WEP), would measure two different speeds.  You had it at military at 278 and at WEP (well, no wep in this case) at 275?

thanks, I've always found this post useful and have used it for my own reference a number of times (or to test my own numbers).

-Soda

[whels]

Originally posted by Soda
Whels,
  I could never figure out how the F4F (since it has no WEP), would measure two different speeds.  You had it at military at 278 and at WEP (well, no wep in this case) at 275?

thanks, I've always found this post useful and have used it for my own reference a number of times (or to test my own numbers).

-Soda

i maybe have miss typed 1 or the other speed. before the new film viewer it was a close guess on the anolog dial what the speed was.

i would like to make a list going from OTD up to 35k at 5k increases, but its huge task with so many planes.

Whels

[Soda]

I had done a couple of such test with a few planes using 100ft increments through "important" areas of their flight model as based on what I could see from the aircraft charts on the help pages.  What I had looked at were basically the zones in the flight envelope where speeds peaked to find the peak speed/altitude.  I also had to make some estimates before the new film viewer arrived.

I had a chart somewhere were I listed these, basically a sea-level speed, a low (alt) cruise speed, and a high (alt) cruise speed.  I used it to help shorten cruise times mostly and to make sure I flew aircraft in "good performance zones".

For example
Typhoon
low cruise: 385@8.1K
high cruise: 400@19K
sea-level: 370/355 (WEP/no)
top speed: 405@18K (WEP)

I think I had this info for basically every aircraft in AH, at least estimates.

-Soda

[Flyboy]

P40b only 275mph?!?!

Is that right?

[Flyboy]

another thing

wasnt the A6m2 faster then the wildcat?

[whels]

bump

[glenmorangie]

Got it Whels - Thanks!

I didn't do too bad reading the charts - less than 5mph in many cases...

[glenmorangie]

Whels

For comparison, My "Soviet Air Force Fighter Colours" lists the stats as:

La-5FN (1943, standard) OTD 356, 394 @ 19,500ft, 4.6 min to 16,500ft
La-7 (1944 and 1945)    OTD 381, 420 @ 20,200ft, 4.2 min to 16,500ft
Yak-9U ( early ) OTD 345, 401 @ 16,400ft, 4.8 min to 16,400
Yak-9U (1945) OTD 361, 422 @ 16,400, 4.1 min to 16, 400

and the one we *really* need

Yak-3U  OTD 374, 438 @ 19,250, 3.9 min to 16,400

It makes no reference to WEP, I'll have to search the text.