SPIT MK I/II and over boost

[41Sqn_Banks]

Originally Posted by jf1981

Quote "Another important difference between the Bf109E and the Spitfire Mk.IA lay in the supercharger design. The early Merlin engines were equipped with gear-driven single-speed, single-stage units. The supercharger had to be throttles back at low altitude to avoid over-boosting the engine. As altitude increased, more and more of the supercharger capability was used and engine horsepower continued to increase until critical altitude was reached, after which power fell off rapidly"

http://theairtacticalassaultgroup.co...s-Spitfire-MkI

This is wrong. Early Spitfire I were equipped with a fixed datum and later Spitfire I were equipped with a variable datum type boost control. Both limited the boost to +6.25 and therefore prevented over-boosting. +6.25 and 2600 PRM is "Climb power" which is allowed for 30 minutes.

Initially the boost control cut-out simply disabled the boost control to allow any boost up to around +17 at low level. Though the use of higher boost than +6.25 was only allowed when 100 octane fuel was used. (This is stated in a 1938 manual btw.!)

In 1940 when 100 octane fuel became available for operational squadrons the boost control cut-out was modified to disable the boost control but still limit the boost to +12 which was then allowed as emergency power for 5 minutes.

Reference: AP 1590B Merlin II and III Aero-Engines (October 1938, reprint October 1939).

[Basha]

As i have read elsewhere about the "Boost" the game should give Spits 100 octane fuel and 12lbs boost to be historically correct but has n't, will the next patch sort this issue ?

[Faustnik]

You are claiming that all Spits in 1940 use 100 Octane and 12 lb boost?

Spit boost in COD is not working. What for the patch when check speeds.

[fruitbat]

Originally Posted by Faustnik

You are claiming that all Spits in 1940 use 100 Octane and 12 lb boost?

Show me that the ones in 11 group weren't, during BoB.

I've read plenty of evidence that plenty were, but of course, i can't show that all important document they all were or weren't, which would finally end this debate one way or the other, because it may never existed.

However, it would be just as useful if someone could put up evidence that spits in 11 group weren't using 100 octane fuel during the BoB. Not squadrons that were on rotation out of 11 group, or in squadrons based in other groups.

I haven't seen any of that.

[TomcatViP]

Oh no ... another year of BS

you guys are really pushing us out of any flight Sim.

I don't fly RoF anymore and now shoot CoD only occasionally as there is no interest to fight those floating Spit MkIIa.

Great spirit!

[fruitbat]

Originally Posted by TomcatViP

Oh no ... another year of BS

you guys are really pushing us out of any flight Sim.

I don't fly RoF anymore and now shoot CoD only occasionally as there is no interest to fight those floating Spit MkIIa.

Great spirit!

Blah blah blah.

Its a fact that plenty of spits and hurris were running around on 12lbs boost.

Just as its pretty apparent that the 109's are under modelled and nerfed too.

What most people want, myself included is the sim to be accurate on both sides, something its not at the moment for either.

[TomcatViP]

A fact ? Really ? lol

And concerning the 109 learn your eng syllabus you'll see that you can do nearly all of what is in the book.

But I am not the kind of guys that think that cruising at max speed is absolutely essential in any serious sim .

[Faustnik]

Fruit bat,

The BoB was several months of improvements with the Merlins. Better engines and better fuel. To say that 1940s Spits used 12 boosts is good look at history.

CoDs Spits boosts are just wrong. I spend a lot of time in the Spit in ATAT online and the Spits are faster then the 109s at low Altitudes. Spits can outrun and dogfight the 109s but, they are very difficult to kill then.

Again, hopefully the patch will fix them.

[Faustnik]

Fruit back,

I'm too slow to right. I like your lost post.

I would like to see with the Spit 1/1a with 9 boost and 87 gas. Spit II with 100 octain and 12 boost. Even better, about 8 Spits for several for 1940 months.

[fruitbat]

Originally Posted by Faustnik

Fruit bat,

The BoB was several months of improvements with the Merlins. Better engines and better fuel. To say that 1940s Spits used 12 boosts is good look at history.

CoDs Spits boosts are just wrong. I spend a lot of time in the Spit in ATAT online and the Spits are faster then the 109s at low Altitudes. Spits can outrun and dogfight the 109s but, they are very difficult to kill then.

Again, hopefully the patch will fix them.

I'm not saying that all spits used 100 octane, as this is obviously not the case, from the fuel totals used by the RAF for 100 octane and 87 octane during the battle, but with all the pilot accounts and squadron opps reports that relate to usage during BoB, to say that non of them were is also foolish. Its even more foolish to assume that 11 group did not have priority.

As to whether the spit mk11a goes to fast on 100 octane, thats not something that i know for sure, but it wouldn't surprise me, It all depends on which particular spit test you choose to use, and what particular configuration it was in equipment etc.... Which leads me to agree that at the moment Spits boost/speeds in combination are wrong at the moment to.

@Tomcat VIP, my German is non existent, so i can only go on the data that people have posted here that seems to show that the 109 is to slow down low, not to mention that non of the planes can reach there ceilings, but i guess thats OK to you.

as to your line,

"But I am not the kind of guys that think that cruising at max speed is absolutely essential in any serious sim"

wow, without your insight, i just don't think i could of managed to fly online for so many years.... Oh wait......