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FM/DM threads Everything about FM/DM in CoD

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Old 09-17-2011, 09:45 AM
whoarmongar whoarmongar is offline
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I have no problem with accurate negG cutout, However I do have to question if a quick spike in negG would cause an instant fuel cutout. Surely the float chamber has some fuel in it when a quick spike of negG occurs? Perhaps the cutout shouldnt be so immediate, I dont know but I just think there would be a very short delay before the negG "event" occured.
I have read many pilot reports of neg G cutout when "bunting" the aircraft nose down, but I havnt read of anyone complaining of negG cutout when climbing and just trimming forward a bit to reduce the rate of climb, as modelled in CloD.
whilst on this subject surely after the fuel starve cutout there should be a overrich "flood" that causes spluttering and a cloud of black smoke (unburnt fuel) for perhaps a couple of seconds. does this happen in game ? I never fly external view but I cant say I have noticed the black smoke.
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Old 09-17-2011, 12:10 PM
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Crumpp Crumpp is offline
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How long do you think a few ounces of fuel last's in a WWII fighter engine consuming 40-160 gallons per hour?

Even in a Lycoming O-360 A1A consuming 8-12 gph, the consumption is high enough and the cut out is for intensive purposes, instantaneous.

Certainly in a climb a float type carb will react if subjected to negative accelerations. In normal climbs, a gust or turbulence acceleration is rapid onset and very short duration so the skipping is not noticed by most pilots. If you have a digital rpm and manifold gauge or an EIS you will see it.

Bunting was a common tactic used by Bf-109 pilots to escape Spitfires on their tail in fact.

A bunt is just a maneuver involving a negative g pushover, especially in an air-to-ground attack or leveling out after a zoom climb.

Last edited by Crumpp; 09-17-2011 at 12:41 PM.
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Old 09-17-2011, 02:43 PM
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ATAG_Snapper ATAG_Snapper is offline
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Quote:
Originally Posted by whoarmongar View Post
I have no problem with accurate negG cutout, However I do have to question if a quick spike in negG would cause an instant fuel cutout. Surely the float chamber has some fuel in it when a quick spike of negG occurs? Perhaps the cutout shouldnt be so immediate, I dont know but I just think there would be a very short delay before the negG "event" occured.
I have read many pilot reports of neg G cutout when "bunting" the aircraft nose down, but I havnt read of anyone complaining of negG cutout when climbing and just trimming forward a bit to reduce the rate of climb, as modelled in CloD.
whilst on this subject surely after the fuel starve cutout there should be a overrich "flood" that causes spluttering and a cloud of black smoke (unburnt fuel) for perhaps a couple of seconds. does this happen in game ? I never fly external view but I cant say I have noticed the black smoke.
The black smoke occurs with both the Spits and the Hurries.
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