Spitfire Mk Ia 100oct performance tests - Patch 1.07.18301

[=AN=Felipe]

Hello gentleman!

Is with a great honor to anoucce the new performance tests.

Settings:

No winds, full fuel tanks, full loadout, pilot with parachute, radiator open, summer conditions, takeoff from Manston.

--------

So lets talk about this tests.

Spitfire Ia 100oct and nothing its the same thing, they produce an airplane with bugs, unreal performance, impossible to manage your engine with WEP, (the engine calls for weak mixture, when you set the weak mixture the water temperature grows too fast, i never see that), impossible use full trhottle under 20k for 15 seconds with hight rpm (2800rpm and 3000rpm), impossible reach 23k ft like IIa...

At climb settings (+9lb boost - 2600rpm) i reach hight temperatures, unexpected in these conditions, i confess i was surprised, we have a plane who cant use all your power, oops he got no power

Unexpected behavior of engine over 19k ft, the temperature of water radiator cool down too fast, 115ºC to 98ºC in 7 seconds... the temperature should be between 100ºC and 105ºC

Under 19k ft, the engine blows up between 108ºC and 112ºC, under the operational WEP limits..................

----------------------

Its good we do this tests to show you pilots, and dev (if they want to see) how this airplanes works and for those who think nothing its happening and think everything its great.


Have a great wekend guys! Hope you enjoy this tests, and use this to avoid Ia 100oct...



=AN=Felipe

[Robo.]

Great job Felipe, I confirm all the issues you mentioned including engine being too fragile (= destroyed well within temperature limits), magical cooling abilities, weird Auto Lean mixture issue and especially wrong boost reading. It's a very difficult plane to use.

I can't see why is it necessary to fly at Auto Lean when you want to use the Boost Cut-Out Override and obtain +12lbs manifold pressure. That it self does not make any sense at all. The highest rpm you can get while flying at Auto Rich is 2600, anything above and your engine starts shaking. Strange overheating issues and unrealistic time limits on climb settings as well ass BCC-O are very strange also.

I wonder if the +9lbs is just a cosmetic issue (wrong gauge reading due to wrong calibration) or the Merlin III in fact flies at +9lbs. boost. I don't know. I really hope this will be addressed in the final version of the patch + they put the mixture lever correct way around at least.

As for the actual speeds, my testing completely confirms what is stated including 2800rpm being optimal for speed at BCC-O (what is called WEP in your pdf). My reading was something like 285mph IAS on the deck. I also noticed nice climb speed between 8000 and some 11000 ft. FTH with the BCC-O seems to be 12000ft. That much is about right.

Thank you very much indeed for your time!

[=AN=Felipe]

Nice Robo and thx!

Its realy good see you testing too, to confirm this datas and compare other Ia 100oct.

I cut off the engine when temperature reach 108ºC, i think, thats why i dont reach 285 IAS with WEP.

If you want i can send my automatic sheet to you, just put the IAS and boom, everything its calculated

So, i confirm when you said about strange behavior of mixture... when you put weak mixture, your engine temperature should increase, weak mixture + WEP = Engine destroyed.

haha lets try Ia right now

[Crumpp]

I can't see why is it necessary to fly at Auto Lean when you want to use the Boost Cut-Out Override and obtain +12lbs manifold pressure.

That would cause big problems in a real engine.

[CaptainDoggles]

Originally Posted by =AN=Felipe

No winds, full fuel tanks, full loadout, pilot with parachute, radiator open, summer conditions, takeoff from Manston.

S~ Felipe, thanks for testing.

I would like to do some testing as well. Would you mind sharing the mission file that you used to test? I don't know my way around the FMB

[=AN=Felipe]

sure! =)

[CaptainDoggles]

Thanks!

[Robo.]

Originally Posted by Crumpp

That would cause big problems in a real engine.

Exactly. Makes no sense at all.

[Redroach]

Originally Posted by =AN=Felipe

Unexpected behavior of engine over 19k ft, the temperature of water radiator cool down too fast, 115ºC to 98ºC in 7 seconds... the temperature should be between 100ºC and 105ºC

What's the problem with that? That's what radiators are good for... dissipating heat as quickly as possible. Combined with ice-cold air flowing by at several hundred mph at high alt, that sounds entirely feasible.

I haven't had any major engine problems either, when watching given limitations (max continuous rpm is 2600) and accounting for the fact that the mixture lever apparently works the wrong way (currently, forward is rich, back is weak ingame, in contrast to reality).
Didn't touch the boost c/o too much, though.