PDA

View Full Version : Cooling the Jumo???



XyZspineZyX
08-19-2003, 08:04 PM
The scenario. I take off, I climb at 280km/h at 99% power cowl flaps almost fully open. I reach 4500m. I locate were the enemies are. I circle for a while with cowl flaps open at 99% power. I then close my cowl flaps and dive on the targets and when climbing back up I engage the MW50 by powering up to 110%. Half a minute later,, ENGINE OVERHEAT! Man this thing overheats all the time! Cooling it down would take ages, if it would cool down at all! Please help me! Give me the correct engine operating procedure!
The Fw 190A-5 and the La-7 can go twice as long without overheats on full power, why can't the D-9 go just as long? Is it a bug, is it me, or is this the way it was in real life?

http://www.iownjoo.com/freeimghost/robban75/Dora-9-3.JPG


'When it comes to aircombat, I'd rather be lucky than good any day!'

XyZspineZyX
08-19-2003, 08:04 PM
The scenario. I take off, I climb at 280km/h at 99% power cowl flaps almost fully open. I reach 4500m. I locate were the enemies are. I circle for a while with cowl flaps open at 99% power. I then close my cowl flaps and dive on the targets and when climbing back up I engage the MW50 by powering up to 110%. Half a minute later,, ENGINE OVERHEAT! Man this thing overheats all the time! Cooling it down would take ages, if it would cool down at all! Please help me! Give me the correct engine operating procedure!
The Fw 190A-5 and the La-7 can go twice as long without overheats on full power, why can't the D-9 go just as long? Is it a bug, is it me, or is this the way it was in real life?

http://www.iownjoo.com/freeimghost/robban75/Dora-9-3.JPG


'When it comes to aircombat, I'd rather be lucky than good any day!'

XyZspineZyX
08-19-2003, 08:12 PM
I'm not sure if this is why but you're supposed to engage and disengage the MW50 only when the engine is idle or else you will damage your engine.

<img src="http://www.geocities.com/agrill101/Sig.jpg.txt"

XyZspineZyX
08-19-2003, 08:20 PM
Oh I know that, I arm it on the ground when at low rpms. But thanks anyway!/i/smilies/16x16_smiley-happy.gif

http://www.iownjoo.com/freeimghost/robban75/Dora-9-3.JPG


'When it comes to aircombat, I'd rather be lucky than good any day!'

XyZspineZyX
08-19-2003, 09:20 PM
A series 190 use radial and the cooling is done with
"A remarkably compact installation, adequate cylinder cooling was obtained using pressure baffling augmented by a magnesium alloy fan geared to turn at 1.72 times engine RPM (3 times propeller speed). An oil tank and cooler are positioned in the nose bowl and are armour plated. The engine mount ring is a sealed unit of square cross-section and also acts as a hydraulic fluid reservoir. Additional streamlining was achieved by the introduction of drag-inducing cowl flaps"

XyZspineZyX
08-19-2003, 09:21 PM
just don't close your radiators when climbing and using mw50 at 110%. if it over heats reduce throttle

XyZspineZyX
08-19-2003, 09:24 PM
See my post in ORR and my many replies elsewhere. I think the problem isn't the coolant getting hot, but rather the oil getting hot, so opening the radiator flaps won't help (the 109K-4 is definitely bugged in that the oil cooler flap never opens, I suspect a similar problem with many planes, including the FW190D-9 and, strangely enough, the LA7). If I remember correctly that plane has both coolant and oil temperature guages, so if you want you can always spend an hour or so testing it.