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XyZspineZyX
08-31-2003, 12:27 PM
Can we have the essential boost override plug modelled please - I think it's the big red one on the left of the control panel which reads: IN CASE OF EMERGENCY. Please read the following extract from 'Hurricane Aces 1939-40' by Tony Holmes...

"As per standard RAF operational procedures, Mould's (No.1 Sqdn's Plt Off P.W.O.'Boy' Mould) groundcrew had immediately refuelled his hurricane (L1842) as soon as the pilot had vacated the cockpit, so without waiting for orders to scramble, Mould jumped back in, hastily fired the aircraft up and pulled the boost override 'plug' in the cockpit so as to increase the boost pressure of the air being fed through the engine's supercharger. Thanks to the extra 'panic boost', Mould climbed skyward in impressive fashion..."

Another account which clearly illustrates the importance of the boost override plug is from Don Minterne's 'The History of 73 Squadron'...

"I took a wild sqirt at the nearest then stood the Hurricane on its nose and pulled the boost override again. There was some light cloud to the west at about 3000ft and I headed for that, with tracers whistling past my ears. Out of the corner of my eye I spotted another nine 109s (and I learned later that the total was in fact 27), but I got into the cloud and relaxed a little, until I realised that I had spent practically the whole flight with the 'plug' pulled, and was just about out of fuel. I spotted a field (Nancy) with French fighters underneath, and landed - as I finished my run the prop stopped." - That was 73 Sqdn's Plt Off P.V. Ayerst.

Without this essential combat boost we're fighting at a distinct disadvantage. However, the boost itself does need to be modelled with the disadvantage of using up fuel at an alarming rate, so as to ensure it will be used appropriately.

Thanks.


S/Ldr. Ginger,
C.O. - No.601 Fighter Squadron, Auxiliary Air Force.

http://www.nzfpm.co.nz/images/small/airtoair14.jpg


The Tangmere Pilots - http://www.tangmere-pilots-raf.co.uk/

XyZspineZyX
08-31-2003, 12:27 PM
Can we have the essential boost override plug modelled please - I think it's the big red one on the left of the control panel which reads: IN CASE OF EMERGENCY. Please read the following extract from 'Hurricane Aces 1939-40' by Tony Holmes...

"As per standard RAF operational procedures, Mould's (No.1 Sqdn's Plt Off P.W.O.'Boy' Mould) groundcrew had immediately refuelled his hurricane (L1842) as soon as the pilot had vacated the cockpit, so without waiting for orders to scramble, Mould jumped back in, hastily fired the aircraft up and pulled the boost override 'plug' in the cockpit so as to increase the boost pressure of the air being fed through the engine's supercharger. Thanks to the extra 'panic boost', Mould climbed skyward in impressive fashion..."

Another account which clearly illustrates the importance of the boost override plug is from Don Minterne's 'The History of 73 Squadron'...

"I took a wild sqirt at the nearest then stood the Hurricane on its nose and pulled the boost override again. There was some light cloud to the west at about 3000ft and I headed for that, with tracers whistling past my ears. Out of the corner of my eye I spotted another nine 109s (and I learned later that the total was in fact 27), but I got into the cloud and relaxed a little, until I realised that I had spent practically the whole flight with the 'plug' pulled, and was just about out of fuel. I spotted a field (Nancy) with French fighters underneath, and landed - as I finished my run the prop stopped." - That was 73 Sqdn's Plt Off P.V. Ayerst.

Without this essential combat boost we're fighting at a distinct disadvantage. However, the boost itself does need to be modelled with the disadvantage of using up fuel at an alarming rate, so as to ensure it will be used appropriately.

Thanks.


S/Ldr. Ginger,
C.O. - No.601 Fighter Squadron, Auxiliary Air Force.

http://www.nzfpm.co.nz/images/small/airtoair14.jpg


The Tangmere Pilots - http://www.tangmere-pilots-raf.co.uk/

XyZspineZyX
08-31-2003, 02:08 PM
Man that guy is lucky...whenever I have 22 airplanes following me around I always get shot down. He's so lucky http://ubbxforums.ubi.com/infopop/emoticons/icon_smile.gif

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XyZspineZyX
08-31-2003, 08:32 PM
I always wondered what that knob was for.

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XyZspineZyX
08-31-2003, 10:29 PM
Good information Ginger, and a reasonable request. What Boost did this knob allow? I'm showing +12 in the FB1.1 MkIIb, possibly this overboost is already modelled as 110% power?

XyZspineZyX
09-01-2003, 12:33 AM
Ever tryed the "w" button which activates "Forzah"(maximum possible power)? /i/smilies/16x16_smiley-tongue.gif

Hurrican´s allready have it from the beginning /i/smilies/16x16_smiley-happy.gif

XyZspineZyX
09-01-2003, 12:33 AM
Not sure about the MkIIb, it's the MkI we fly. It's the ability to increase power above the ordinary...'Emergency Use'...that we're lacking.

S/Ldr. Ginger,
C.O. - No.601 Fighter Squadron, Auxiliary Air Force.

http://www.nzfpm.co.nz/images/small/airtoair14.jpg


The Tangmere Pilots - http://www.tangmere-pilots-raf.co.uk/

XyZspineZyX
09-01-2003, 12:40 AM
Overboost is modelled as 110%.

It's also sometimes referred to as "breaking the wire" - as the throttle lever would be halted by a thin wire system upto 100% in some early war planes. In case of emergency, just ram the lever forward, the inhibitor wire breaks, and you shift throttle to 110%.

If there is a higher throttle setting than even that, not counting the "Forzsah" of Russian modified Hurricanes, I am not aware of it.







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XyZspineZyX
09-01-2003, 12:41 AM
Yes I have...it doesn't work on my MkI.

S/Ldr. Ginger,
C.O. - No.601 Fighter Squadron, Auxiliary Air Force.

http://www.nzfpm.co.nz/images/small/airtoair14.jpg


The Tangmere Pilots - http://www.tangmere-pilots-raf.co.uk/

XyZspineZyX
09-01-2003, 01:16 AM
Sorry just tryed it.Hurrican Mk1 doesnt have it in game.
So you are right.

I dont think that 110% is boost,because the MkII has 110% and Boost.Forzah means maximum possible Power,i think it is a typo that it isnt named boost.
I think only the Fielmod Hurri was changed by the russians and there only the arnament.But i could be wrong.

XyZspineZyX
09-01-2003, 01:33 AM
The "Forszah" boost as I know, is a injection system and not just a increased boost in manifold. I think the only reason the Hurricane MkIIc might have them is because either the Russians installed it so, or a "wet WEP" was included in the upgrades in the transition from MkI to the MkII.

AFAIK, none of the major fighter planes during BoB had any sort of secondary boost/WEP system outside of the overboosted throttles(110%). Spits, Hurris and Emils included.




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XyZspineZyX
09-01-2003, 10:46 AM
This still leaves the Hurricane MkI without its 'Panic boost'...and thus historically inaccurate. Also, any chance of a cockpit clock - it should go immediately to the right of the boost plug. We could really do with this as an aid to navigation.

Thanks again...

S/Ldr. Ginger,
C.O. - No.601 Fighter Squadron, Auxiliary Air Force.

http://www.nzfpm.co.nz/images/small/airtoair14.jpg


The Tangmere Pilots - http://www.tangmere-pilots-raf.co.uk/

XyZspineZyX
09-01-2003, 11:10 AM
Ok, to put it simply,

Panic boost IS 110% throttle.





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XyZspineZyX
09-01-2003, 12:07 PM
Which the Hurricane MkI does not possess, please try and keep up...

S/Ldr. Ginger,
C.O. - No.601 Fighter Squadron, Auxiliary Air Force.

http://www.nzfpm.co.nz/images/small/airtoair14.jpg


The Tangmere Pilots - http://www.tangmere-pilots-raf.co.uk/

XyZspineZyX
09-01-2003, 03:15 PM
No601_Ginger wrote:
- Which the Hurricane MkI does not possess, please try
- and keep up...
-
- S/Ldr. Ginger,
- C.O. - No.601 Fighter Squadron, Auxiliary Air Force.


The Hurricane MkI has 110% throttle in FB. I tested it 30sec ago.

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XyZspineZyX
09-02-2003, 03:18 AM
As have I, which proved most usueful in the Finnish campaign I recently finished.



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XyZspineZyX
09-02-2003, 09:59 AM
Indeed it does. It appears that the Hurricane runs at 110% at maximum throttle, which means the pilot has to reduce speed to notice the boost! Having read more on the subject it appears that the boost plug's proper title is the 'automatic boost emergency cut-out.'This seems to imply that it would automatically run on boost until disengaged by the pilot - which does fit in with current flight modelling.

What about that clock?

S/Ldr. Ginger,
C.O. - No.601 Fighter Squadron, Auxiliary Air Force.

http://www.nzfpm.co.nz/images/small/airtoair14.jpg


The Tangmere Pilots - http://www.tangmere-pilots-raf.co.uk/

XyZspineZyX
09-02-2003, 05:10 PM
- The Hurricane MkI has 110% throttle in FB. I tested
- it 30sec ago.

It doesn't have the speed that goes with 12lbs boost though.

12lbs boost should give about 280 - 290mph at sea level, in game it gives less than 260 mph. 260mph was possible on 87 octane fuel, 6.25lbs boost.

Most Hurricanes IIs could use 14lbs boost.

XyZspineZyX
09-02-2003, 05:28 PM
I doubt this applies to Finnish or Soviet Hurricanes as well, which we have in FB .

Also I can`t see how a Hurri could attain 290mph at SL, faster or as fast as most early Spitfires at SL, including the MkV, when everybody knows the Hurricane was much slower than even Spit I.

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XyZspineZyX
09-02-2003, 06:45 PM
- I doubt this applies to Finnish or Soviet Hurricanes
- as well, which we have in FB .
Finnish Hurricanes probably not, other Hurricane Is yes. It would apply to soviet Hurricane IIs, providing they had 100 octane fuel.

- Also I can`t see how a Hurri could attain 290mph at
- SL, faster or as fast as most early Spitfires at SL,

Spit II did 290 mph at sea level at 9lbs boost. At 12lbs, power increased by 180 bhp, about 18%. The difference between 6.25lbs and 12lbs, in both the Spit and Hurricane, was put as about 25mph at sea level.

The difference between 9lbs and 12lbs is going to be around 15mph.

So the Spit II would do about 305 mph at sea level with 12 lbs boost,

If you take te middle of the range I gave for the Hurri, that means the Hurri II was about 20mph slower than the Spit with the same power, which sounds about right.

XyZspineZyX
09-02-2003, 06:56 PM
Here, here...in actual fact the hurricane Mk1 was faster at sea level than the Bf.109E.

What about a cockpit clock!

S/Ldr. Ginger,
C.O. - No.601 Fighter Squadron, Auxiliary Air Force.

http://www.nzfpm.co.nz/images/small/airtoair14.jpg


The Tangmere Pilots - http://www.tangmere-pilots-raf.co.uk/

XyZspineZyX
09-03-2003, 01:49 PM
Hop, I just looked up Soviet NII VVS tests for Hurricane II.

They dont show the exact SL speed, because the minimum is 450mph, and the Hurri II is very far from reaching that, its speed curves way back, towards 420 kph or so, which is exactly right in game: 260 mph.

Regardless of what they did or did not reach in RAf service, Soviet ones could make more than 260 mph, thats for sure. Probably they were limited to +9lbs, as AFAIK, highest Soviet grade was 95 octane.

In any case, +12lbs was strictly a *last resort* boost even in British service. Perhaps they should add it as a WEP button.

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'Only a dead Indianer is a good Indianer!'

Vezérünk a Bátorság, K*sérµnk a Szerencse!
(Courage leads, Luck escorts us! - Historical motto of the 101st Puma Fighter Regiment)

Flight tests and other aviation performance data: http://www.pbase.com/isegrim

XyZspineZyX
09-03-2003, 03:35 PM
- Hop, I just looked up Soviet NII VVS tests for
- Hurricane II.
-
- They dont show the exact SL speed, because the
- minimum is 450mph, and the Hurri II is very far from
- reaching that, its speed curves way back, towards
- 420 kph or so, which is exactly right in game: 260
- mph.

So have I. Shall we use them as a source for the 109E3 as well? Looks to be similar, or worse, than the Hurri II at sea level.

260 is the speed for the Hurricane at 6.25lbs boost. The boost gauge in the Hurri II clearly shows 12lbs boost, so the plane should be doing 280 - 290mph, 450 km/h plus.

- Regardless of what they did or did not reach in RAf
- service, Soviet ones could make more than 260 mph,
- thats for sure.

Certainly not at 6.25lbs boost. Of course, they might have used the full power in service, even if not in those tests.

- Probably they were limited to +9lbs,
- as AFAIK, highest Soviet grade was 95 octane.

Even 9lbs should provide a lot more than 260 mph, which was the speed at 6.25 lbs, and could be achieved on 87 octane fuel.

9lbs should put the speed up to over 270 mph, 435 km/h. At the moment in FB it's around 415 km/h

14 lbs was the max boost on 100 octane, so I should think 12 lbs should be possible on 95 octane.


- In any case, +12lbs was strictly a *last resort*
- boost even in British service. Perhaps they should
- add it as a WEP button.

Certainly add it as a WEP button, but bear in mind Dowding's comments:

"The use of the automatic boost cut out control enables the pilot to get an emergency boost of 12lbs per sq in. from the engine for 5 minutes when circumstances demand it. Some pilots "pull the plug" with little excuse on every occasion"

In other words, it's like every other type of WEP, something that gives you extra power that should only be used in combat.

See the first post in this thread for examples about how commonly, and how long, pilots used this extra boost.

XyZspineZyX
09-03-2003, 05:08 PM
hop2002 wrote:
-
- So have I. Shall we use them as a source for the
- 109E3 as well? Looks to be similar, or worse, than
- the Hurri II at sea level.

Similiar? Worse? /i/smilies/16x16_smiley-happy.gif

The NII VVS graph shows about 440 for the 109E-3, somewhat lower than British sources which show 460 kph and Swiss charts that give 464kph .

The NII VVS graph, when extended, shows Hurri II w. Merlin XX speed as about 420 kph.

Correct me if I am wrong, but about 440 kph is more than 420.

-
- 260 is the speed for the Hurricane at 6.25lbs boost.
-

Love to see any proof of that claim. Tests, maybe ?



- The boost gauge in the Hurri II clearly shows 12lbs
- boost, so the plane should be doing 280 - 290mph,
- 450 km/h plus.

It seems the boost gauge is wrongly set in the game, it should be corrected so that it shows +9 lbs at 110%, so that the boost rates should correspond with speed. Quite a few planes have small inaccuracies with their boost gauges in the game.


-

-- Probably they were limited to +9lbs,
-- as AFAIK, highest Soviet grade was 95 octane.
-
- Even 9lbs should provide a lot more than 260 mph,
- which was the speed at 6.25 lbs, and could be
- achieved on 87 octane fuel.

So tthe Hurri II is faster than the Spit V, when both run at +9lbs? I though Spits were much faster than Hurris.

Given that the Spit II P7280 in test yielded 290mph at SL with +9lbs, I would expect the Hurri to do about 250-260 at the same power, +9lbs, as Hurris were appx. 30-40mph slower than Spits according on the same power to all accounts, ie. Hurri I did 510 kph at alt. whereas Spit I did around 570 kph.

It seems that the in-game Hurri IIs perform nicely to their +9lbs performance specs. It shouldn`t be forgotten that this is an EF sim.


-
- 9lbs should put the speed up to over 270 mph, 435
- km/h. At the moment in FB it's around 415 km/h
-

As I shown above, 415 is apprx. right for +9lbs. Unless you tell me that there was very little speed difference between Hurris and Spits... It also agrees with the performance the Soviets actually measured on the Hurri II.



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'Only a dead Indianer is a good Indianer!'

Vezérünk a Bátorság, K*sérµnk a Szerencse!
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Flight tests and other aviation performance data: http://www.pbase.com/isegrim

XyZspineZyX
09-03-2003, 07:15 PM
- The NII VVS graph shows about 440 for the 109E-3,
- somewhat lower than British sources which show 460
- kph and Swiss charts that give 464kph .
-
- The NII VVS graph, when extended, shows Hurri II w.
- Merlin XX speed as about 420 kph.

The VVS graph shows a curved line for the E3. It's curving away as it gets lower, so no way is it going to hit 440kp/h.

Regardless, are you ready to accept 440 kp/h as the sea level speed of the 109E3, when the Spit I could do 480 - 490 kph?

-- 260 is the speed for the Hurricane at 6.25lbs boost.
--
-
- Love to see any proof of that claim. Tests, maybe ?

A test in 1939, fitted with a Merlin II, gave 273 at 5000ft, 294 at 10,000ft, which points to about 252 at sea level, but that's with the fixed pitch 2 bladed prop.

The Hawker Hurricane by Mason gives 280 mph at sea level, which is almost certainly for 12lbs.

- It seems the boost gauge is wrongly set in the game,
- it should be corrected so that it shows +9 lbs at
- 110%, so that the boost rates should correspond with
- speed. Quite a few planes have small inaccuracies
- with their boost gauges in the game.

If it's corrected to 9lbs, the performance still needs to be increased.

If the speed isn't aroun d 280, then that needs to be taken into account designing any West Front or North Africa scenarios.

-- Even 9lbs should provide a lot more than 260 mph,
-- which was the speed at 6.25 lbs, and could be
-- achieved on 87 octane fuel.
-
- So tthe Hurri II is faster than the Spit V, when
- both run at +9lbs? I though Spits were much faster
- than Hurris.

No, at 9lbs the Spit II did 290 mph, the Spit V should be slightly faster, the Spit I slightly faster still (I think), and the Hurricane should be faster than 260, but nowhere near as fast as 290.

- Given that the Spit II P7280 in test yielded 290mph
- at SL with +9lbs, I would expect the Hurri to do
- about 250-260 at the same power, +9lbs, as Hurris
- were appx. 30-40mph slower than Spits according on
- the same power to all accounts, ie. Hurri I did 510
- kph at alt. whereas Spit I did around 570 kph.

Huris were not 30 - 40 mph slower. For example, the Spit I had a critical alt of around 19,000ft, the Hurricane I just over 17,000ft, so the max speeds are useless as a comparison for the speed at the same height.

The Spit I did about 280 - 285 at sea level at 6.25 lbs boost.The Hurricane did about 280 at 12lbs.As 12lbs boost added 25 mph, then the Hurri was about 25 mph slower than the Spit I at similar power.

- It seems that the in-game Hurri IIs perform nicely
- to their +9lbs performance specs. It shouldn`t be
- forgotten that this is an EF sim.

No, it performs to 6.25lbs specs.

The Hurri I in game does 418 kp/h in the object viewer, and that's roughly what I get. That's for the Finnish Hurri, which probably couldn't do more than 6.25 lbs (I doubt it had the neccesary mods).

The Hurri II in game does 412 kp/h in the object viewer, which is again about what I get in game. Again, it still fits with 6.25lbs boost.

- As I shown above, 415 is apprx. right for +9lbs.
- Unless you tell me that there was very little speed
- difference between Hurris and Spits...

No, I'd say about 25 mph. Note the Spit I would do about 295 mph with 9lbs boost (it was slightly faster than the Spit II at the same boost). That would put the Hurri at 9 lbs at right around 270 mph, which again fits.

- It also
- agrees with the performance the Soviets actually
- measured on the Hurri II.

The Soviets obvioulsly measured at 6.25 lbs.



Message Edited on 09/03/0306:19PM by hop2002

XyZspineZyX
09-03-2003, 11:36 PM
http://hometown.aol.co.uk/JStirlingBomber/Hurri9a.jpg



Message Edited on 09/03/0310:49PM by NeilStirling

XyZspineZyX
09-04-2003, 02:14 AM
Thanks Neil

XyZspineZyX
09-04-2003, 02:58 PM
hop2002 wrote:

-
- The VVS graph shows a curved line for the E3. It's
- curving away as it gets lower, so no way is it going
- to hit 440kp/h.

LOL. Those bad 109s, I forgot. /i/smilies/16x16_smiley-very-happy.gif


-
- Regardless, are you ready to accept 440 kp/h as the
- sea level speed of the 109E3, when the Spit I could
- do 480 - 490 kph?

Since when could the Spit I go 490 kph ? 290mph, maybe, with increased boost... /i/smilies/16x16_smiley-very-happy.gif

Here`s an actual result:

Spitfire Mk I Merlin III with CS prop, Boscombe down, March 1940:

It says 339mph for 15k, and 320mph for 10k. Thus SL speed is 320mph - 2x19mph ...

= 282 mph, or 454 kph.


Of course if you can show me an Spit I tested at operational load that does 490 kph (supposedly faster than Mk V itself when introduced... I wonder what need was for the MkV then?)...

It also agrees well what I found on published Fighter speeds during BoB, which give as follows for Ground level:

Bf 109E with DB 601A : 283 mph
Hurri I w. Merlin III : 246 mph
Hurri II w. Merlin XX : 268 mph
Spit I w. Merlin III : 282 mph

All speeds agree very nicely with actually measured top speeds in tests, ie. Spit I, 109E.

Notice: Hurri I. is -36mph slower than Spit I.

-
--- 260 is the speed for the Hurricane at 6.25lbs boost.
---
--
-- Love to see any proof of that claim. Tests, maybe ?
-
- A test in 1939, fitted with a Merlin II, gave 273 at
- 5000ft, 294 at 10,000ft, which points to about 252
- at sea level, but that's with the fixed pitch 2
- bladed prop.


I don`t see any mentioning of a fixed pitch prop nor any other test conditions in the test, ie. armament carried or not, condition etc.. Though your est. 252mph is rather close to the published 246 mph.


-
-- It seems the boost gauge is wrongly set in the game,
-- it should be corrected so that it shows +9 lbs at
-- 110%, so that the boost rates should correspond with
-- speed. Quite a few planes have small inaccuracies
-- with their boost gauges in the game.
-
- If it's corrected to 9lbs, the performance still
- needs to be increased.
-

Not at all. Look at Neil`s curve.

At +9lbs:

10k : 308mph
5k : 289mph

So at SL we could expect about 270mph, or 434kph, which is pretty much what we get in the game. Exact maximum speeds are hard to get, mostly due to slipstream. With certain late war planes /i/smilies/16x16_smiley-wink.gif , I get -60 kph slower unless I correct with the rudder at altitude. But with rudder input, everything is fine.


-
- If the speed isn't aroun d 280, then that needs to
- be taken into account designing any West Front or
- North Africa scenarios.
-

Do you really think that adding +10mph would make any real difference ? One way or another, the Hurri II would still be the slowest fighter around in 1941-42, by far as 80 kph at SL..

Would decreasing this to -65 kph make a difference, especially that the gain from boost is more than consumed by ungainly tropical filter in Norht Africa scenarios ?

After all, there`s no 109E-4/N with 1175PS DB 601N either...


-
--- Even 9lbs should provide a lot more than 260 mph,
--- which was the speed at 6.25 lbs, and could be
--- achieved on 87 octane fuel.
--
-- So tthe Hurri II is faster than the Spit V, when
-- both run at +9lbs? I though Spits were much faster
-- than Hurris.
-
- No, at 9lbs the Spit II did 290 mph, the Spit V
- should be slightly faster, the Spit I slightly
- faster still (I think), and the Hurricane should be
- faster than 260, but nowhere near as fast as 290.


Uhm, not really relevant, but what exactly should be the Spit V faster than 290 mph at +9lbs than the Spit II ? They are the same. Logically, if you dont have more power, you aren`t going any faster.

Spit VB test of W3114 at +9lbs shows 351 mph at 15k, and 331mph at 10k. Obviously, speed at SL was 331 - 2 x 20mph = 291 mph = 468kph. Same as Spit II.


-
-- Given that the Spit II P7280 in test yielded 290mph
-- at SL with +9lbs, I would expect the Hurri to do
-- about 250-260 at the same power, +9lbs, as Hurris
-- were appx. 30-40mph slower than Spits according on
-- the same power to all accounts, ie. Hurri I did 510
-- kph at alt. whereas Spit I did around 570 kph.
-
- Huris were not 30 - 40 mph slower. For example, the
- Spit I had a critical alt of around 19,000ft, the
- Hurricane I just over 17,000ft, so the max speeds
- are useless as a comparison for the speed at the
- same height.

But trends are similiar at SL, too. Look up the stats reported on performance above. Hurri is exactly -36mph slower at SL than the Spit.

If I compare that to the Spit II 290mph at SL for +9, one should expect around 260 mph for +9lbs for the Hurri II.

-
- The Spit I did about 280 - 285 at sea level at 6.25
- lbs boost.
-
-
- The Hurricane did about 280 at 12lbs. As
- 12lbs boost added 25 mph, then the Hurri was about
- 25 mph slower than the Spit I at similar power.

That`s doesn`t make much sense, these are differnet planes. Neil`s data gives ~252mph for +6.25, that`s exactly 30mph less than a Spit I at +6.25.

290 - 30 = 260mph at +9lbs for the Hurri. Pretty much what you have in the game. You simply have a +9lbs Hurri, with a bad boost gauge.



-
-- It seems that the in-game Hurri IIs perform nicely
-- to their +9lbs performance specs. It shouldn`t be
-- forgotten that this is an EF sim.
-
- No, it performs to 6.25lbs specs.
-
- The Hurri I in game does 418 kp/h in the object
- viewer, and that's roughly what I get. That's for
- the Finnish Hurri, which probably couldn't do more
- than 6.25 lbs (I doubt it had the neccesary mods).
-
- The Hurri II in game does 412 kp/h in the object
- viewer, which is again about what I get in game.
- Again, it still fits with 6.25lbs boost.
-

Then what makes you think that the Lend Lease Hurri II had the neccesary modifications to go above 6.25 lbs or used it at all above +6.25 in combat?

But otherwise, Neil`s figures give the following for an early Hurri at various boosts at SL:

+6.25lbs : 252 mph
+9 lbs: 270 mph
+12 lbs : 285 mph

What you have in game is around 257mph, but of course it`s hard to get exact speeds, and neither you should expect to reach the same speeds with the heavier, less aerodynamic Hurri II as with the Hurri I.


-- It also
-- agrees with the performance the Soviets actually
-- measured on the Hurri II.
-
- The Soviets obvioulsly measured at 6.25 lbs.
-

Maybe, but then again, it was probably the maximum Hurri IIs could do in Soviet service w/o 100 octane fuel or the neccesary modifications to make advantage from using it. Also, as I read from Soviet veteran who fought on them, Soviet Hurris were originally intended for desert work, so they probably had Tropical filters (and came in desert camo), which hardly improved their speed.

So, you have Soviet L-L Hurri IIs, but not British ones. On the other hand, you don`t have to worry about Bf 109 E-4/N or E-7/N either in WF scenarios.


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