Fuel in da planes

General discussion for CFS2 - WW 2 Pacific Theater

Fuel in da planes

Postby Falcon500 » Mon Jan 16, 2006 7:55 pm

It seems that all of the stock aircraft have the wrong "mileage" when flown, at least in comparison with the "Pilot Manual" that came with the game.

the closest one i found  was the corsair, at a grand 87% of what is posted in the manual! the worst of the stock aircraft, (the ones i tested in total F4U,F4F,F6F,A6M2,P38,TBF,NIK2) was the P-38 at a lonesome 31% of 1750 miles.

I believe most of the accuracies are wrong because the cruise altitudes are set low (between 7 and 12 thousand feet) as per to gain the accuracy of a short wide theatre, unlike the ETO which was narrow and tall.

I have a few addon aircraft that are within a few miles, the worst addon aircraft was a B-29with a written range of over 4000 miles but a simulator range of around 600. :o

Just posting info that may help mission builders.  ;D

Corsair       1362
Wildcat        513
Hellcat         788
A6m2           751
George        757
TBF-1          466
Lightning    544

mind you all but the TBF had drop tanks and all did have to take off from a ground base.
What do I do you ask? I struggle! Then destroy! Then try to put back together what I just broke on accident.....




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Re: Fuel in da planes

Postby AvHistory » Mon Jan 16, 2006 9:35 pm

How did you do the test?
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Re: Fuel in da planes

Postby H » Tue Jan 17, 2006 1:15 am

If not editing files, pull back your throttle (during flight or before warping (X) to the next waypoint).
Last edited by H on Tue Jan 17, 2006 1:16 am, edited 1 time in total.
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Re: Fuel in da planes

Postby Hagar » Tue Jan 17, 2006 6:21 am

How did you do the test?

Exactly. You might be interested in this. http://www.475thfghf.org/Lindbergh.htm

With additional fuel cells in the J model P-38, Satan's Angels had been making six and one-half and seven-hour flights.  On I July Lindbergh flew a third mission with the group, an armed reconnaissance to enemy strips at Nabire, Sagan One and Two, Otawiri, and Ransiki, all on the western shore of Geelvink Bay. Already Lindbergh's technical eye noticed something.  After six and one-half hours flying time, he landed with 210 gallons of fuel remaining in his Lightning's tanks.

Two missions later, on 3 July, the group covered sixteen heavies on a strike against Jefman Island.  Lindbergh led Hades Squadron's White Flight as they wove back and forth above the lumbering B-25s.  After the attack the Lightning's went barge hunting.

First one, then two pilots reported dwindling fuel and broke off for home.  MacDonald ordered the squadron back but because Lindbergh had nursed his fuel, he asked for and received permission to continue the hunt with his wingman.  After a few more strafing runs, Lindbergh noticed the other Lightning circling overhead.  Nervously the pilot told Lindbergh that he had only 175 gallons of fuel left.  The civilian told him to reduce engine R.P.M.'s, lean out his fuel mixture, and throttle back.  When they landed, the 431st driver had seventy gallons left, Lindbergh had 260.  They had started the mission with equal amounts of gas.

Lindbergh talked with MacDonald.  The colonel then asked the group's pilots to assemble at the recreation hall that evening.  The hall was that in name only, packed dirt floors staring up at a palm thatched roof, one ping pong table and some decks of cards completing the decor.  Under the glare of unshaded bulbs, MacDonald got down to business.  "Mr. Lindbergh" wanted to explain how to gain more range from the P-38s.  In a pleasant manner Lindbergh explained cruise control techniques he had worked out for the Lightning's: reduce the standard 2,200 rpm to 1,600, set fuel mixtures to "auto-lean," and slightly increase manifold pressures.  This, Lindbergh predicted, would stretch the Lightning's radius by 400 hundred miles, a nine-hour flight.  When he concluded his talk half an hour later, the room was silent.

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Re: Fuel in da planes

Postby Falcon500 » Tue Jan 17, 2006 8:38 am

Well I un-knowingly made a mission that started at Mindanao Airbase to Hollandia which the game says is 1350+ miles, I took off (as well as i could, bombers really dont like to leave the ground) and raised the flaps and gear, centered the ailerons, rudder, and elevator. Then let the computer's warp "engine" take over and when it gave me the "Fuel low, Engine sputtering" message I wrote down the amount of mileage remaining.

As variables i changed the temp. and re-tested the corsair and variance were only a few tenths of a mile (which may be accounted for on take off.)

I had the Take off waypoint, then another waypoint at 25,000 ft and 270 knots, that was 1350 miles away and all aircraft were at different highths and different speeds when they recieved the fuel low message. I checked the A6M2 and the cruise altitude in the .dp is what sets the cruise altitude (oddly enough ::)) and the cruise speed and all other speeds in the .dp are measure in kilometers per hour.

I should change one and see what happens, like change the P-38 to a higher altitude and lower speed and see what happens.

;D
Last edited by Falcon500 on Tue Jan 17, 2006 8:40 am, edited 1 time in total.
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Re: Fuel in da planes

Postby AvHistory » Tue Jan 17, 2006 10:48 am

You need to "fly" the plane to get max range.  The game switches to full rich if you let it fly.

Prop pitch & mixture need to be optimized by hand.
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Re: Fuel in da planes

Postby H » Tue Jan 17, 2006 11:30 pm

I haven't had the issue of spark plug foul-up in the sim ;). I've made a few missions where, in the mission briefing, the warning: "Watch your fuel. If you run full throttle, you may not even get there, let alone return."
Reality:
During the Battle of Midway, the IJN was too far away for a round-trip attack (running the planes on full throttle). Although the concensus was that it was a hazzard to the engines, necessity dictated the need to conserve fuel, thus the throttles were eased back to an effective cruise speed.
Whether aircraft, automotive or hobbycraft, the principles are basic. For quick effect, more fuel consumption is needed; to cruise along, cut back. A 4-barrel carberator has two big venturies for full power but, for cruise speeds, it operates on two much smaller ones. On a long trip, I got much better milage with the 4-barrel than with a 2-barrel with the same type engine. This, of course, means not consistantly flooring it to pass everything else on road (or in the air). 8)
Last edited by H on Tue Jan 17, 2006 11:35 pm, edited 1 time in total.
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Re: Fuel in da planes

Postby AvHistory » Wed Jan 18, 2006 10:24 am

A 4-barrel carberator has two big venturies for full power but, for cruise speeds, it operates on two much smaller ones.


Unless its a Holly Double Pumper or Carter AFB ;)
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Re: Fuel in da planes

Postby H » Wed Jan 18, 2006 10:41 pm

H: A 4-barrel carberator has two big venturies for full power but, for cruise speeds, it operates on two much smaller ones.
Unless its a Holly Double Pumper or Carter AFB ;)
But they still get better gas milage (somewhat) when you don't shove it to the floor. ;) 8)
Last edited by H on Thu Jan 19, 2006 2:31 am, edited 1 time in total.
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Re: Fuel in da planes

Postby Falcon500 » Wed Jan 18, 2006 11:21 pm

??? holly double pumper ???  How bout a P&W R-2800-59  ;)

I understand now.... but there is no way im testing the zero's almost two thousand mile range  ;)
What do I do you ask? I struggle! Then destroy! Then try to put back together what I just broke on accident.....




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Re: Fuel in da planes

Postby H » Thu Jan 19, 2006 2:33 am

I understand now.... but there is no way im testing the zero's almost two thousand mile range  ;)
Why not? I'll simulate a hand wave as you fly over. 8)
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.Re: Fuel in da planes

Postby AvHistory » Thu Jan 19, 2006 10:32 am

[quote] ??? holly double pumper ???
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Re: Fuel in da planes

Postby H » Thu Jan 19, 2006 11:59 pm

I've cut throttle for a warp in CFS2 but haven't really compared consumption effects in it. In CFS1, it depends upon where I place my throttle control (in my case, keyboard commands have been aliased elsewhere). By cutting it completely off, I still have a full tank at the destination waypoint; partial cut provides the relative consumption reduction. I have little doubt that the subsequent format (CFS2) is any different (I haven't specifically mentioned it but, of course, relavent mixture and prop settings are also applicable - see AvHistory's info above). ;) 8)
Last edited by H on Fri Jan 20, 2006 12:02 am, edited 1 time in total.
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Re: Fuel in da planes

Postby Falcon500 » Fri Jan 20, 2006 9:43 pm

true i could just start off with 20% percent fuel and see how far i go ;D

As for throttle... it seems CFS type engines (not fs98) are not affected by the difference in throttle position before warp. i have noticed this with certain aircraft with fs98 engines. I have also noticed that with stock cfs2 aircraft you can turn the fuel off and be warped with full tanks ;D
What do I do you ask? I struggle! Then destroy! Then try to put back together what I just broke on accident.....




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Re: Fuel in da planes

Postby AvHistory » Fri Jan 20, 2006 10:52 pm

I have also noticed that with stock cfs2 aircraft you can turn the fuel off and be warped with full tanks ;D



Which makes the range question irrelevant to anyone who does not want to actually fly the mission.

With warp a P-51 can escort a B-29 from Wichita to Tokyo & back :o
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