wep on RAF planes awol???? boost levels??? no 100 octane fuel:(

[Osprey]

OK, Handling trials held for gun configuration, Martlesham Heath 20th July 1939

K9787 (8 brownings)
Merlin II, 2 blade wood fixed:
time to 20kft = 9.4min
Speed@18.5kft = 363 mph
CEILING = 31,900

K9783 (8 brownings)
Merlin II, 3 blade DH 2 pitch (5/20 bracket):
time to 20kft = 11.4min
Speed@18.5kft = 367 mph
CEILING = 34,400

L1007 (2 hispano, no brownings at all)
Merlin III, 3 blade DH type 5/21 bracket (that is not a CPS unit, it's a later 2 speed bracket for the Merlin III):
time to 20kft = 10.7min
Speed@18.5kft = 364 mph
CEILING = 34,500


So, there's not a massive difference between the types. The difference is in take off distance, acceleration and pilot workload. All spitfires were converted to the 5/29 and 5/30 brackets for CPS during June and July 1940

[Biggs]

Originally Posted by Osprey

OK, Handling trials held for gun configuration, Martlesham Heath 20th July 1939

K9787 (8 brownings)
Merlin II, 2 blade wood fixed:
time to 20kft = 9.4min
Speed@18.5kft = 363 mph
CEILING = 31,900

K9783 (8 brownings)
Merlin II, 3 blade DH 2 pitch:
time to 20kft = 11.4min
Speed@18.5kft = 367 mph
CEILING = 34,400

L1007 (2 hispano, no brownings at all)
Merlin III, 3 blade DH type 5/21 bracket (that is not CPS!):
time to 20kft = 10.7min
Speed@18.5kft = 364 mph
CEILING = 34,500

yep... well the mkIs in this game dont really come close to that.. i got 260IAS @18ooo with the mkI... but thats still about 20 IAS off.

def needs MOAR BOOST!!!!

[fruitbat]

hey Biggs, can you confirm something for me re fuel mix in the spit.

it seems to only have 2 positions correct?

i can't get it to run smooth at 18,500ft guessing its pilot error on my part, any clues?????

also, de Havilland vs Rotol, both on 87 octane fuel, appendix B and C.

[Biggs]

Yeah its either full rich or full lean.

[fruitbat]

thats what i thought.

now, why can i not get it to run smooth on either at 18,000ft, any idea what i'm doing wrong?

[madFinn]

Are you applying the pitot probe position errors to get CAS vs IAS? The charts for the Mark 2 are on page 20 of http://www.zenoswarbirdvideos.com/Im...pit2Manual.pdf

Could be the source of your perceived lack of performance.

[Biggs]

Originally Posted by madFinn

Are you applying the pitot probe position errors to get CAS vs IAS? The charts for the Mark 2 are on page 20 of http://www.zenoswarbirdvideos.com/Im...pit2Manual.pdf

Could be the source of your perceived lack of performance.

Not sure, but that wouldnt explain why the mkI and mkIa have different top speeds.

The funny thing is the mkI with the 2 pitch should top out a little fast than the mkIIa... MkI should be 364TAS whereas the mkIIa should only make 354...

The main advantage of the mkii is the added hp and constant speed unit. But they only add in climb rate and not top speed

As of right now:
spit mkI - 260 IAS
spit mkIa - 220 IAS
spit mkIIa - 280 IAS

they should all be at least 280 IAS

...omg are you already going so anal?!?! Why don't you lucky sods enjoy what you have and which some of us still can't play instead of wasting time looking for all these data?!

[Faustnik]

Originally Posted by Sternjaeger

...omg are you already going so anal?!?! Why don't you lucky sods enjoy what you have and which some of us still can't play instead of wasting time looking for all these data?!

I love the tecnical info.

http://www.spitfireperformance.com

[BadAim]

You guys are nuts! Have fun crunching the numbers though, if that's what floats yer skiff.