Author Topic: Pyro, Possible Mossie Endurance Error  (Read 442 times)

Offline funkedup

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Pyro, Possible Mossie Endurance Error
« on: October 19, 2001, 03:18:00 PM »
Bozon did some endurance tests at sea level, full throttle, 25% fuel and 10x multiplier, which yielded 95 second endurance.  Multiply times 4 for the fuel load and 10 for the multiplier and that equates to 3800 seconds or 1.056 hours for 100% fuel load and "historical" 1.0 multiplier.

Now refering to Snafu's Pilot's Notes we see that this airplane had 452 gallons internal fuel capacity.  If it burns that fuel load in 1.056 hours that is a fuel consumption rate of 428 gallons per hour.

It's a twin engine plane, so that's 214 gallons per hour per engine.  However the highest fuel consumption shown in the pilot's notes is about 115 gallons per hour.  Furthermore the Pilot's Notes charts indicate Total Gallons Per Hour which I believe includes both engines.  So that would be 57.5 gallons per hour per engine, which means AH fuel consumption is off by about 272%.

However that appears to be a cruise figure, not a full throttle figure, because the TAS is only 240 kts at sea level.  Referring to Pilot's Notes for other Merlin-engined RAF aircraft, the highest fuel consumption rate I can find is the Spitfire Mk. IX at 130 gallons per hour, at +15 boost and 3000 rpm.  If that is a realistic figure then the 214 gph figure is still off by about 65%.  Much better than 272% but still a sizable error.

Based on this information I think the AH Mossie is either consuming fuel at too high of a rate, or the fuel tanks are too small.  Please take a look at this HTC.  I will do some further testing to verify the in-game endurance figures.

Also please take a look at the loadouts.  In the bomb bay there should be the options of 2 x 500 lb bombs or one 63 gallon long-range fuel tank or the current 2 x 250 lb bombs.  Additionally, the Pilot's Notes make a direct reference to the simultaneous carriage of drop tanks and rocket projectiles on the wings.

Thanks

[ 10-19-2001: Message edited by: funkedup ]

Offline Vermillion

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Pyro, Possible Mossie Endurance Error
« Reply #1 on: October 19, 2001, 04:19:00 PM »
Evidently, at the Con, Karnak and Pyro were discussing this.

I think the consensus is that your right and the mossie fuel endurance is porked

Offline funkedup

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Pyro, Possible Mossie Endurance Error
« Reply #2 on: October 19, 2001, 06:01:00 PM »
Glad to hear that!

Offline Tac

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Pyro, Possible Mossie Endurance Error
« Reply #3 on: October 19, 2001, 06:04:00 PM »
its a twin, of course its porked!  ;)  :D

Offline Bozon12

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Pyro, Possible Mossie Endurance Error
« Reply #4 on: October 20, 2001, 02:54:00 PM »
To calculate fuel consumption in gal/hour units, i took the 100 gallon DT and tested the time needed to empty them with full throttle at x10 fuel-burn-rate.
results:
at x10: 1:33 per tank (100 gal)
that means:
at x1: 15:30 per 100 gallon.
that is:
(60/15.5)*100 = 387 gallons per hour.
or 193.5 gal/hour per engine.
estimated error for the experiment is 2 sec meaning 20 sec on real-time, so error on the final result is (rounding up) ~ 8 g/h for both engines. each engine result = 193 -+ 4.

funkedup claims that the merlin engine on spit9 consumes 130 g/h at full throttle, which is much less that the 190 g/h our mossie's engine is doing.

Bozon

Offline Karnak

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Pyro, Possible Mossie Endurance Error
« Reply #5 on: October 22, 2001, 02:47:00 AM »
Yes, Pyro was thinking that he had miscalculated the total tankage of the 4 inner fuel tanks on the Mossie.
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Offline Nash

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Pyro, Possible Mossie Endurance Error
« Reply #6 on: October 22, 2001, 06:44:00 PM »
Did he also happen to mention anything about the internal loadout?  :)

Offline Karnak

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Pyro, Possible Mossie Endurance Error
« Reply #7 on: October 22, 2001, 06:59:00 PM »
We discussed it briefly.

I'm not sure what the outcome was.  I described the short finned 500lb bombs that were produced for the Mosquito VI and mentioned that it was well documented.

His documentation apparently wasn't clear on the internal bombload.

If we can provide the sources I'm sure that they'll add the bombs.
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Offline Hobodog

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Pyro, Possible Mossie Endurance Error
« Reply #8 on: October 24, 2001, 05:07:00 PM »
We4ll its fixed now so what the hell.

Offline Karnak

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Pyro, Possible Mossie Endurance Error
« Reply #9 on: October 24, 2001, 06:22:00 PM »
Hobodog,

The Mosquito MkVI in AH is a Series 2.

It just lacks the 500lb bombs for its internal loadout.  We're working on providing HTC the data for that.
Petals floating by,
      Drift through my woman's hand,
             As she remembers me-