0 - 375 mph acceleration

[GODO]

Sealevel, WEP, burn rate 1, 50% fuel, all planes with their minimum weapons loadout.

0 - 200 mph
La7 2x20 - 23 secs
N1K2J - 24 secs
109G2 1x20 - 24 secs
Tempest - 25 secs
109G10 1x20 - 25 secs
La5FN - 26 secs
190A5 2x20 - 26 secs
109F 1x20 - 26 secs
109G6 1x20 - 26 secs
SpitXIV - 26 secs
F4U4 - 27 secs
Typhoon - 27 secs
Yak9U - 28 secs
SpitIX - 28 secs
C205 - 28 secs
A6M5 - 29 secs
190D9 - 29 secs
SpitV - 29 secs
P38L - 29 secs
F6F5 - 31 secs
P51D - 32 secs
F4U1D - 32 segs
190A8 2x20 - 32 secs
P47D30 - 33 secs
Bf110G - 34 secs
190F8 - 34 secs
Mosquito - 35 secs
P51B - 35 secs
F4U1 - 35 secs
Ki61 - 36 secs
Ta152 - 36 secs

0 - 250 mph
La7 2x20 - 34 secs
SpitXIV - 36 secs
Tempest - 36 secs
109G10 1x20 - 36 secs
La5FN - 37 secs
109G2 1x20 - 37 secs
N1K2J - 38 secs
109F 1x20 - 39 secs
F4U4 - 40 secs
109G6 1x20 - 40 secs
Typhoon - 41 secs
190A5 2x20 - 41 secs
Yak9U - 42 secs
C205 - 42 secs
190D9 - 42 secs
SpitIX - 43 secs
P38L - 45 secs
F4U1D - 45 secs
SpitV - 46 secs
F6F5 - 46 secs
190A8 2x20 - 46 secs
P51D - 47 secs
A6M5 - 48 secs
P47D30 - 49 secs
P51B - 50 secs
Ta152 - 50 secs
190F8 - 51 secs
F4U1 - 53 secs
Bf110G - 53 secs
Mosquito - 53 secs
Ki61 - 57 secs

0 - 300 mph (* planes with top speed below 300 mph)
La7 2x20 - 50 secs
Tempest - 51 secs
109G10 1x20 - 53 secs
SpitXIV - 56 secs
La5FN - 57 secs
F4U4 - 58 secs
190D9 - 60 secs
Typhoon - 61 secs
Yak9U - 62 secs
109G2 1x20 - 63 secs
N1K2J - 68 secs
109F 1x20 - 68 secs
109G6 1x20 - 68 secs
190A5 2x20 - 68 secs
P51D - 70 secs
190A8 2x20 - 70 secs
F4U1D - 70 secs
C205 - 72 secs
Ta152 - 73 secs
P51B - 76 secs
P38L - 77 secs
P47D30 - 77 secs
190F8 - 77 secs
SpitIX - 80 secs
F6F5 - 80 secs
F4U1 - 80 secs
SpitV - 86 secs
Mosquito - 85 secs
Bf110G - 94 secs
Ki61 - 117 secs
A6M5 - * (top speed 288 mph 143 secs)

0 - 350 mph (* planes with top speed below 350 mph)
Tempest - 80 secs
La7 2x20 - 84 secs
109G10 1x20 - 96 secs
F4U4 - 97 secs
190D9 - 101 secs
Typhoon - 109 secs
SpitXIV - 113 secs
La5FN - 122 secs
P51D - 127 secs
Yak9U - 137 secs
Ta152 - 138 secs
F4U1D - 147 secs
P51B - 158 secs
F4U1 - 160 secs
190A8 2x20 - 232 secs
N1K2J - * (top speed 325 mph 183 secs)
P38L - * (top speed 332 mph 211 secs)
190A5 2x20 - * (top speed 340mph 225 secs)
190F8 - * (top speed 349 mph 248 secs)
SpitIX - * (top speed 320 mph ? secs)
SpitV - * (top speed 316 mph ? secs)
109F 1x20 - * (top speed 332 mph 175 secs)
109G2 1x20 - * (top speed 340 mph 179 secs)
109G6 1x20 - * (top speed 336 mph 180 secs)
C205 - * (top seep 331 mph 177 secs)
P47D30 - * (top seep 342 mph 196 secs)
F6F5 - * (top seep 329 mph 186 secs)
Bf110G - * (top seep 320 mph 188 secs)
Mosquito - * (top seep 337 mph 234 secs)
Ki61 - * (top seep 313 mph 194 secs)

0 - 375 mph (* planes with top speed below 375 mph)
Tempest - 117 secs (top speed 387 mph 208 secs)
La7 2x20 - 143 secs (top speed 380 mph)
190D9 - 225 secs (top speed 375 mph)
Typhoon - * (top speed 370 mph 201 secs)
F4U1D - * (top speed 356 mph 220 secs)
F4U1 - * (top speed 357 mph 336 secs)
Ta152 - * (top speed 361 mph 221 secs)
109G10 1x20 - * (top speed 367 mph ? secs)
P51D - * (top speed 366 mph 224 secs)
La5 - * (top speed 356 mph ? secs)
Yak9U - * (top speed 355 mph ? secs)
P51B - * (top speed 358 mph 262 secs)
F4U4 - * (top speed 374 mph 205 secs)
SpitXIV - * (top speed 358 mph 173 secs)

EDIT: added P51B, F4U4, A6M5, Bf110G, Mosquito, SpitXIV, Tempest and Ki61.

[Tarmac]

Wow.  I'm kinda surprised that the 190A5 has such good low-end acceleration.  

What was your method?  Autotakeoff and then autolevel?  Wep the whole time I assume.  

Any plans to fit other planes in there?  I'd be especially interested in the 109g2, 109f4, p51b, and C205.  Hellcat, F4U, and Jug too.

Good stuff though.  Thanks.

[GODO]

wep and manual takeoff (except with Yak9U), I'll keep adding planes to the list. I used a multi-stopwatch running 10 timers, used 4 for 200, 250, 300 and 350 and several for top speeds.

Yep 190A5 seems a good low speed accelerator. I'm kinda surprised about low speed acceleration of D9, outaccelerated by 190A5 up to 250 mph and by La5 up to 300mph.

I'm about to add 350 and 375 times now.

[Kweassa]

I knew the N1K2 was a fast accelerating plane despite its slow speed... but I never knew it was that fast...

[GODO]

Added 109F, 109G6, 109G2, C205, F4U1D, F4U1, Typhoon, Ta152H, F6F5 and P47D30.

[Urchin]

I always thought climb-rate and acceleration were strictly proportional.  I.E.  a plane that can out-climb a different plane at a given altitude will also out-accelerate it.  

Is this true or not true?

[Janov]

First off: Nice work on the list!

The physics behind the whole deal is complicated, getting into efficiencies of props and such, but to simplify it: At 0 speed the amount of force the prop can pull and the weight of the plane determine acceleration. At higher speeds aerodynamics enter the picture, basically the drag (parasitic and induced) subtract from the force available for acceleration, until they become equal: top level speed.
For climbing its more complicated. You will have to put the plane at the best climb speed (rate), called Vy. It is the best compromise between going slow (less parasitic drag) and going at a speed where the wings can operate at the most efficient angle of attack. This will be different for different planes, and different weights.
So in conclusion, a plane with a great acceleration must not also be a great climber (though it will usually not be bad), since depending on the wing it might have to climb at a higher Vy than another plane, increasing parasitic drag, while planes built for slower speed can utilize that in a low speed climb (like the 109s).

One thing is shown by the chart very clearly: TIME TO FIX THE TA152!!!

Litjan

[13Promet]

Nice work GODO.
A suggestion for your tests: the 0-x acceleration test doesn't say much about operational plane performance because very rarely you get still during fight, and when you do you will dive afterwards.
What about testing 200-350 (or 375) acceleration, which is the typical operational situation ?


Thank you for your work


Promet

[TimRas]

Originally posted by 13Promet
What about testing 200-350 (or 375) acceleration, which is the typical operational situation ?

Just subtract the time 0-200mph from time 0-350mph, and you get the time 200-350mph.

[13Promet]

Originally posted by TimRas
Just subtract the time 0-200mph from time 0-350mph, and you get the time 200-350mph.

Looks like I was not completely waken up when i posted

[fats]

--- Urchin: ----
I always thought climb-rate and acceleration were strictly proportional.  I.E.  a plane that can out-climb a different plane at a given altitude will also out-accelerate it.  
--- end ---

Think it's something like a plane that outclimbs  another plane at given altitude _and_ speed will also outaccelerate it at that altitude and speed.


// fats

[hitech]

fats you are almost correct , but you should state it thus. If a plane can out climb at a giving alt and SPEED.

Or to put it differently.

Climb rate and acceleration are linanarly proptional.( i.e. vary the same %) for any given speed and altitude.


HiTech

[Shane]

it's not the other plane you need to worry about out-accelerating, it's the bullets you need to worry about.

[_Schadenfreude_]

Damn La7 needs perking..

[Mister Fork]

Great results GODO.  BTW - here are my acceleration results from 150-250mph in AH1.  They're pretty equal.  I may have to retest the results again after AHII comes out.

Acceleration

Test Environment
Altitude: test 1 @ 150 ft , test 2 @ 18000ft
Winds: 0
Fuel Burn Rate: 0.01
Fuel: 25%
Vo: 150Mph
Vf: 250Mph
WEP: On

Description
All aircraft were loaded with 25% fuel and with minimal MG loads if available. Aircraft were auto-levelled at altitude (150 feet and 18000ft) and speed reduced to 125mph, except the Me 262* and Me 163*. 100% throttle was applied and WEP engaged (if available). At 150mph the timer was engaged to 250Mph. This was repeated five times for every aircraft. The average time was recorded to accelerate through 100 mph.   Ground speeds were recorded for all altitudes.

* Vo was 200, Vf was 300 due to stall conditions.

Forumla
Acceleration
a = (Vf - Vo) / t m/s^2
where
Vf - final velocity
Vo - initial velocity
t - time in seconds

Vf = 250mph = 111.8 m/s
Vo= 150mph = 67.1 m/s

a = (111.8m/s - 67.1m/s) / t
a = 44.7m/s / time

Acceleration Results: 150 ft
Aircraft | Seconds | Acceleration[list=1]

• Me 163 | 7.7 | 5.8
• Tempest V | 16.7 | 2.7
• La-7 | 16.9 | 2.6
• Spit XIV | 16.9 | 2.6
• Bf 109G-10 | 17.1 | 2.6
• La-5FN | 17.6 | 2.5
• Me 262 | 19.5 | 2.3
• Fw 190D-9 | 20.2 | 2.2
• Bf 109G-2 | 20.5 | 2.2
• F4U-4 | 20.8 | 2.1
• Typhoon | 21.5 | 2.1
• Bf 109G-6 | 21.8 | 2.1
• P-38L | 22.0 | 2.0
• Bf 109F-4 | 22.1 | 2.0
• C205 | 22.2 | 2.0
• Fw 190A-8 | 22.8 | 2.0
• Fw 190A-5 | 23.0 | 1.9
• P-51D | 23.3 | 1.9
• NIK2-J | 23.4 | 1.9
• Spit IX | 23.6 | 1.9
• F4U-1D | 23.8 | 1.9
• F4U-1C | 24.0 | 1.9
• Ta-152H | 24.0 | 1.9
• Yak-9U | 24.0 | 1.9
• P-47D-30 | 24.5 | 1.8
• F6F-5 | 24.6 | 1.8
• Bf 110G-2 | 24.9 | 1.8
• C202 | 24.9 | 1.8
• Fw 190F-8 | 25.1 | 1.8
• Spit V | 26.0 | 1.7
• Mosq VI | 26.1 | 1.7
• Yak-9T | 26.2 | 1.7
• F4U-1 | 26.5 | 1.7
• P-47D-11 | 26.9 | 1.7
• Seafire IIC | 27.0 | 1.7
• P-47D-25 | 27.1 | 1.6
• A6M5b | 27.9 | 1.6
• P-51B | 28.0 | 1.6
• Hurr IIC | 29.1 | 1.5
• FM2 | 29.9 | 1.5
• Bf 110C-4b | 30.0 | 1.5
• Ki-61-I-KAIc | 30.4 | 1.5
• Bf 109E-4 | 33.2 | 1.3
• Spit IA | 33.5 | 1.3
• Hurr IID | 34.9 | 1.3
• P-40E | 36.0 | 1.2
• Hurr Mk 1 | 37.0 | 1.2
• A6M2 | 40.3 | 1.1
• F4F-4 | 40.9 | 1.1

Acceleration Results: 18000 ft
Aircraft | Seconds | Acceleration[list=1]

• Me 163 | 6.0 | 7.5
• Bf 109G-10 | 24.8 | 1.8
• Spit XIV | 25.1 | 1.8
• Bf 109F-4 | 25.7 | 1.7
• Bf 109G-2 | 26.7 | 1.7
• P-38L | 26.8 | 1.7
• F4U-4 | 27.0 | 1.7
• Bf 109G-6 | 27.5 | 1.6
• Spit IX | 27.7 | 1.6
• Fw 190D-9 | 27.8 | 1.6
• C205 | 28.5 | 1.6
• P-47D-30 | 28.9 | 1.5
• La-7 | 29.0 | 1.5
• Fw 190A-5 | 29.5 | 1.5
• P-51D | 29.9 | 1.5
• Tempest V | 30.2 | 1.5
• P-51B | 30.4 | 1.5
• C202 | 30.6 | 1.5
• Spit V | 30.6 | 1.5
• Yak-9U | 30.7 | 1.5
• Ta-152H | 30.9 | 1.4
• La-5FN | 31.5 | 1.4
• P-47D-25 | 31.5 | 1.4
• F4F-4 | 31.9 | 1.4
• P-47D-11 | 33.7 | 1.3
• Seafire IIC | 34.2 | 1.3
• Fw 190A-8 | 34.6 | 1.3
• NIK2-J | 35.7 | 1.3
• F4U-1D | 35.8 | 1.2
• A6M5b | 36.9 | 1.2
• F6F-5 | 37.1 | 1.2
• Fw 190F-8 | 37.2 | 1.2
• F4U-1C | 37.3 | 1.2
• F4U-1 | 39.0 | 1.1
• Me 262 | 39.3 | 1.1
• Typhoon | 39.7 | 1.1
• Bf 109E-4 | 41.2 | 1.1
• Bf 110G-2 | 41.9 | 1.1
• Mosq VI | 42.1 | 1.1
• Hurr IIC | 42.9 | 1.0
• Bf 110C-4b | 43.3 | 1.0
• Ki-61-I-KAIc | 44.8 | 1.0
• Yak-9T | 45.0 | 1.0
• A6M2 | 45.2 | 1.0
• Spit IA | 47.1 | 0.9
• Hurr Mk 1 | 57.5 | 0.8
• FM2 | 57.8 | 0.8
• Hurr IID | 59.6 | 0.8
• P-40E | 71.6 | 0.6
• P-40B | 73.9 | 0.6