#3255744 - 04/01/11 06:54 PM
Neg g engine cut-outs?
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Mace71
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Dread pirate Mace
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Are negative g engine cut-outs modelled? It didnt seem so when flying the spit and hurri....
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"There is only one way to avoid criticism: do nothing, say nothing and be nothing." Aristotle
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#3255749 - 04/01/11 06:58 PM
Re: Neg g engine cut-outs?
[Re: Mace71]
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BKHZ_Furbs
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#3255795 - 04/01/11 07:39 PM
Re: Neg g engine cut-outs?
[Re: Mace71]
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sascha
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^Agreed. I already posted something to the effect that realism settings could use a lot more options. Including a seperate option for "neg-G cutout on/off". Maybe if they hadn't bothered putting all these "can't jump to another plane"-options in there ... S.
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#3255862 - 04/01/11 08:09 PM
Re: Neg g engine cut-outs?
[Re: Mace71]
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Mace71
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I havent got CEM on. Are you saying with it on the engine cuts out under neg g's?
Antec 902 | Intel i7 920 2.66Ghz OC'd to 3.40GHz | MSI GeForce GTX 660 Black Knight 2048MB GDDR5 | Corsair 6GB DDR3 | Coolermaster V8 CPU Cooler | W7 64
"There is only one way to avoid criticism: do nothing, say nothing and be nothing." Aristotle
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#3255865 - 04/01/11 08:11 PM
Re: Neg g engine cut-outs?
[Re: Mace71]
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sharpe26
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I havent got CEM on. Are you saying with it on the engine cuts out under neg g's? with the Spit and that on, my experience is yes. With the Hurricane and without it; no.
I'm a crappy pilot, but one hell of a shot.
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#3256034 - 04/01/11 10:02 PM
Re: Neg g engine cut-outs?
[Re: Mace71]
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sascha
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I wouldnt mind the -ve G issue with a solid -1 to -2G push but coughing when setting up a gradual descent using perhaps only 0.8G in the nose position change is crazy I didn't find it impossible to push the nose down slightly without the engine cutting out. Only when I pushed a bit harder, did is cut. Remember that even when you're just sitting at your PC, you're experiencing +0.9 G. So even with 0 G (weightlessness) the thingie in your carb should stop working. -1 or -2 are pretty serious negative G already. Engine should cut out before that.
System: Asus P5Q-E - Intel Core 2 Quad Q9300@ 2.5 GHz (currently @3.0 GHz) - Gigabyte GF GTX460 1GB OC - 2x2 GB OCZ DDR2-RAM - Samsung P2370 23'' - MS Sidewinder 2 FF (red trigger, baby!) - Saitek Pro Flight Rudder Pedals - TrackIR 5 + Pro-Clip - Windows Vista 64 Home Premium
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#3256155 - 04/01/11 11:24 PM
Re: Neg g engine cut-outs?
[Re: Mace71]
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xnomad
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So I'm guessing that doing a bunt against AI opponents isn't going to be of any advantage either?
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#3256157 - 04/01/11 11:27 PM
Re: Neg g engine cut-outs?
[Re: IvanK]
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No457_Squog
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Melbourne, Australia
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Yes -ve G cut outs are there and imo are overdone. Its not possible to perform a slow lowering of the nose say setting up a gradual descent without the engine coughing. I wouldnt mind the -ve G issue with a solid -1 to -2G push but coughing when setting up a gradual descent using perhaps only 0.8G in the nose position change is crazy I think you're right. The negative G cutout feels like it happens WAY too early. Couple that with head shake/movement means that it is VERY hard to shoot accurately at an evading target.
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#3256775 - 04/02/11 01:29 PM
Re: Neg g engine cut-outs?
[Re: No457_Squog]
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KraziKanuK
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From Graham White's book 'Allied Piston Engines of WW2', pg 66.
An idiosyncrasy of the SU carb wasa condition known as rich "cutout" caused by -G. In fact, the -G cutout was a two stage event. At the onset of -G, fuel was forced to the top of the float chamber, which exposed the main jets to air. This caused the first momentary , lean cutout. If the -G condition continued, the floats reacted to the reverse of normal conditions and floated the wrong way, that is, they floated to the bottom of the float chamber. The needle valve opened wide, allowing full fuel pressure from the engine driven pump to flood the carb. An excessively rich mixture was then admitted into the supercharger causing the more serious rich cutout.
For a fighter pilot this could pose a severe limitation: if the stick was pushed forward a momentary loss of power or a complete cutout would result.
There was only 16 squadrons of RAF fighters that used 100 octane during the BoB. The Fw190A could not fly with the outer cannon removed. There was no Fw190A-8s flying with the JGs in 1945.
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