Spitfire makes only 300 mph?

reflected · #1 04-09-2011, 12:25 PM

I dare anyone to fly the Spit MK2 faster than that. It's supposed to make 350mph, but no matter how I adjust my prop, it jsut wouldn't go faster. The max speed I can reach in the MKI is about 250. What am I doing wrong? Full real except for temp.effects.

Kurfürst · #2 04-09-2011, 12:30 PM

Indicated airspeed show by your speed gauge is generelly less than True Air Speed. There is a conversion table in the manual.

reflected · #3 04-09-2011, 12:32 PM

I know, it was at sea level

lacusch69 · #4 04-09-2011, 02:04 PM

Srácok, ezt magyarul is megbeszélhettétek volna...

(Both guy is hungarian)

Blue Scorpion · #5 04-09-2011, 02:17 PM

Several people including myself have already posted on the performance level of spits and hurri's they appear to be seriously porked, and nowhere near where they should be for 100-octane fuel. Boost levels are wrong, as is rate of turn, roll, and climb, frankly the fm performance data is less sim and more arcade atm, that, or the in game instruments and behaviour are wrong.

I gave up trying to evaluate anything else, as frankly far too much is broken, or not working as intended to make reasonable assessments, until the basics are fixed, it's back on the shelf.

JG53Frankyboy · #6 04-09-2011, 02:45 PM

Quote:

Originally Posted by Blue Scorpion

..............I gave up trying to evaluate anything else, as frankly far too much is broken, or not working as intended to make reasonable assessments, until the basics are fixed, it's back on the shelf.

very good summary !!
i also gave up...

ICDP · #7 04-09-2011, 03:24 PM

I took a Spitfire MkII on a seal level speed test, quick mission over the channel. With a well trimmed and slightly open radiator I was able to get about 311mph IAS. This speed would indicate the Spitfire MkII is indeed using 100 octane fuel.

Make sure to adjust your prop for best speed, this isn't IL2 where you leave it on 3000 RPM at all times. I found the best to be around 2600 - 2800 RPM.

Inidentally, the boost guage only goes up to 8lb but that doesn't mean that is the bost we get. Spitfires in BoB still had the old boost guage and when pulling full boost the needle was off the guage with 100 octane fuel.

As I said, the speed seems to match a MkIIa with 100 octane fuel.

fruitbat · #8 04-09-2011, 03:34 PM

Quote:

Originally Posted by ICDP

I took a Spitfire MkII on a seal level speed test, quick mission over the channel. With a well trimmed and slightly open radiator I was able to get about 311mph IAS. This speed would indicate the Spitfire MkII is indeed using 100 octane fuel.

Make sure to adjust your prop for best speed, this isn't IL2 where you leave it on 3000 RPM at all times. I found the best to be around 2600 - 2800 RPM.

Inidentally, the boost guage only goes up to 8lb but that doesn't mean that is the bost we get. Spitfires in BoB still had the old boost guage and when pulling full boost the needle was off the guage with 100 octane fuel.

As I said, the speed seems to match a MkIIa with 100 octane fuel.

i think you may be right, figures i have (P 7280 test Boscombe Down sept 1940) show spit MkII top speed at 290mph at sea level on 9lbs boost.

@25 mph is about right for the diff between 87 octane and 100 octane fuel at sea level according to my sources, so pretty close.

Spit MkII according to this test, makes 354mph at 17554ft.

Kurfürst · #9 04-09-2011, 03:45 PM

Quote:

Originally Posted by ICDP

Make sure to adjust your prop for best speed, this isn't IL2 where you leave it on 3000 RPM at all times. I found the best to be around 2600 - 2800 RPM.

Inidentally, the boost guage only goes up to 8lb but that doesn't mean that is the bost we get. Spitfires in BoB still had the old boost guage and when pulling full boost the needle was off the guage with 100 octane fuel.

As I said, the speed seems to match a MkIIa with 100 octane fuel.

Looks like it's only a faulty boost gauge Than..

Anyway it seemed to me that Oleg modelled the MkII as CSP+100 octane, the Mk Is are with two pitch props and 87 octane. Good choice IMHO.

The thing about rpm is odd though. I believe you have to fly 3000/+12 to get max speed, less rpm should yield less power.. CSPs seem buggy too, far from being "complex", as in RL, where u had to operate throttle and rpm in set sequence to avoid over/underboosting, right now they work like German automated throttles, where u operate a single lever and görget about the rest..

reflected · #10 04-09-2011, 03:47 PM

Not to mention that the Spit MK Ia should have a CS prop as well...