help flying the corsair

[dflion]

Originally Posted by TheGrunch

100% Prop Pitch in the game = Max RPM, so I don't see what you mean. The reasons I can see for dabbling with prop pitch in an aircraft with a CSU are to gain more speed in a dive, prevent the prop overspeeding in an abrupt powerdive or for fuel economy and oil/radiator coolant temperature reasons, although for some reason I HAVE always felt more comfortable flying the with prop pitch on manual. You CAN get an extra jot of speed by reducing pitch slightly when you're fast and level, but other than that, 100% in combat most of the time, and definitely for takeoff, landing and maximum climb rate.

I have just had a test fly of the Tempest and explored the prop pitch situation in the game. The diagram that I originally posted was taken from an English 'Aeroplane Mag' - I know that the finer the prop pitch is, (see diagram) the higher the RPM. And if you set a courser pitch the lower the RPM (real WWII aircraft situation).
What I have noticed, in the take-off situation, Oleg and Co. may have reversed this situation in IL2 (he may have resolved the situation in BOB) - if you set the pitch to 100%(course) in the game the higher the RPM.
Once the aircraft gets to altitude in IL2, the courser the propellor pitch (100%), the aircraft travels at higher speed - good for combat. It appears that Oleg may have compromised the situation for the sake of gameplay?
I have a friend that flys a real Kittyhawk and Spitfire at Temora NSW Australia - I will try and contact him to further discuss this situation.
Anyway we have a real discussion point in this thread. Suggest you 'test fly' the Tempest and see what you think?

DFLion

[TheGrunch]

Originally Posted by dflion

I have a friend that flys a real Kittyhawk and Spitfire at Temora NSW Australia - I will try and contact him to further discuss this situation.
Anyway we have a real discussion point in this thread. Suggest you 'test fly' the Tempest and see what you think?

DFLion

I don't think it's really an issue, all you need to remember is that Prop Pitch actually just means RPM. It's like the propeller control lever in an early Spitfire IX. It should be called Governed RPM or just RPM.

[dflion]

Originally Posted by TheGrunch

I don't think it's really an issue, all you need to remember is that Prop Pitch actually just means RPM. It's like the propeller control lever in an early Spitfire IX. It should be called Governed RPM or just RPM.

Do you think Oleg has compromised the prop pitch situation in IL2? I remember him saying in one of the latest BOB threads that you can watch the propellor pitch turn when setting the pitch on the Stuka.
I have just spoken to an 87 year old WWII vet who flew Liberators, Ventura's and Hudsons. They always used 'fine pitch' for take-off and landing (more RPM) and 'course pitch' (paddle effect) for cruising to save fuel. I don't think Oleg has modelled this faithfully in IL2 and this causing all the confusion? (this has probably been discussed many times before)

DFLion

[TheGrunch]

Originally Posted by dflion

I have just spoken to an 87 year old WWII vet who flew Liberators, Ventura's and Hudsons. They always used 'fine pitch' for take-off and landing (more RPM) and 'course pitch' (paddle effect) for cruising to save fuel. I don't think Oleg has modelled this faithfully in IL2 and this causing all the confusion? (this has probably been discussed many times before)

DFLion

I don't think he has modelled it incorrectly, I don't understand the confusion. Prop Pitch is just RPM. 0% Prop Pitch is coarse pitch/minimum RPM, 100% Prop Pitch is full fine/max RPM. What's the problem? I have mentioned this several times already, you control the RPM governor, not the pitch directly.
If you're trying to conserve fuel you just turn down the Prop Pitch to about 75% or something. For economical flying, for example, the Spit IX manual recommends flying in the lower MS supercharger gear at the highest obtainable boost for that altitude, up to a maximum of +7 lbs/sq. in., and reducing the speed to 170 mph using the RPM governor down to a minimum of 1800 RPM.

[Ctrl E]

thanks for the great info. what about magnetos, anyone?

and the superchargers? if i'm in trouble at low level would i get better performance for a sharp burst by ramping the supercharger up to 3?

[TheGrunch]

Originally Posted by Ctrl E

thanks for the great info. what about magnetos, anyone?

and the superchargers? if i'm in trouble at low level would i get better performance for a sharp burst by ramping the supercharger up to 3?

Magnetos you don't really need to worry about, unless you turn them off in flight by accident.
I don't think you'd get better performance, and I think you'd probably make your engine sad if you did. You could try, though, I'm sure.

[Skoshi Tiger]

Originally Posted by Ctrl E

thanks for the great info. what about magnetos, anyone?

Please correct me if I'm wrong, it's been a long time since I did my BAK test and any actual flying. But the dual Magneto's have two functions.

No 1 Safety (Main reason) - having a redundant ignition system, one gets damaged the other one is still operational.

No 2 Performance (Minor) - Having the two sparkpugs firing (Some aircraft with converted non aero engines have the dual magnetos hooked up to the single spark plugs so this dosent apply) gives a more even burn of the fuel in the combustion chamber which leads to a more efficent burn. In practice this only amounts to a small percentage increase in performance. When your doing your engine run up and you switch to a single magneto, your RPM only drops a few percent (in a 152 you run your engine up to 1700RPM and the maximum drop allowed is about 125RPM) The check is mainly used to check to see if both magnetos are actually running

Cheers!

[R0NNC0]

Change supercharger on the Corsair at 6000ft and 18,000ft when you're running wide open; switch a little higher on lower power. If you shift too early, you'll rob power from the engine-check the RPM gauge when you shift prematurely and you'll see the RPMs drag a little bit. Hellcat is the same way.

[PilotError]

Originally Posted by Ctrl E

thanks for the great info. what about magnetos, anyone?

and the superchargers? if i'm in trouble at low level would i get better performance for a sharp burst by ramping the supercharger up to 3?

You should normally run with both magnetos on , ie 1 + 2.
But the magnetos are modelled for damage. So if your engine starts running rough, or more usually just stops after beng hit, then try switching to 1 or 2 individually and restart the engine. If it is a damaged magneto then your engine will restart and you can continue what you were doing.

It has happened to me in the past a few times, but usually if your engine gets hit it will be more serious damage to the engine itself.

Hope that makes sense.

Cheers.