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Fuel usage? (Read 4286 times)

TurbofanDude Full Member Offline Programmer, B-52H and 737NG Lover Posts: 143 Location: United States Joined: Dec 11^th, 2010 Gender:	Fuel usage? Dec 15^th, 2010 at 11:56am	Print Post
	Hi there, It seems that whenever the center tank emptys on the BUFF, it shuts the engines down, despite having 50% everywhere else. If I turn on all the crossfeeds and try to restart they come back and run fine. No crossfeeds = engines shut down at the end of the center tank why? Should all the cross feeds be on while flying?

	Thank You,&&Collin Biedenkapp,&&&&<div class="scroll" style="float: left; font-size: 10px; font-family: verdana,sans-serif; overflow: auto; max-height: 200px; width: 99%;"><br><br><a href="http://www.captainsim.com/" target="_blank">Web Site</a> \| <a href="http://www.captainsim.com/support/" target="_b
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Markoz CS Team Offline Posts: 12372 Location: Victoria, Australia Joined: Apr 24^th, 2009 Gender:	Re: Fuel usage? Reply #1 - Dec 16^th, 2010 at 12:02am	Print Post
	I have done quite a few flights with empty center tanks (Center, Center 1 and Center 2) and all engines were still running. Admittedly, they were empty to start with. I'm still figuring out the fuel system. I'm trying to work out which way a switch has to be for it to be ON or OFF. Some need to be horizontal, others vertical. It is possible that you thought a pump switch or crossfeed switch was ON when in fact it was OFF. The �B-52 Driver� FLIGHT MANUAL Part II � Aircraft and Systems isn't very clear on the fuel system. So I'm find it tricky. Mark

	Mark Fletcher PC: i7 10700K @3.8/5.1GHz \| 64GB DDR4 3200 \| 12GB RTX 4070 Super \| 32" LCD Monitor \| 1TB SSD & 2x2TB SSD \| Win 11 Pro - FSX/FSX-SE/P3D3/P3D4/P3D5/P3D6/MSFS2020 15.6" Gaming Laptop: i7 7700HQ \| 32GB DDR4 \| 6GB GTX 1060 \| 256GB SSD & 1TB HDD \| Win 10 Pro 64bit - FSX-SE/P3D4
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JP4JP8 New Member Offline Posts: 1 Location: Colorado, USA Joined: Dec 16^th, 2010 Gender:	Re: Fuel usage? Reply #2 - Dec 16^th, 2010 at 12:58am	Print Post
	Still messing with the FMP. Captain Sim has done an excellent job recreating the panel! (As well as the rest of the cockpit!) The only things I can see missing are the Primary/Secondary Fuel Level Control Valve check switch and the CG/FLAS system, neither of which are show stoppers by any means. I have discovered that the knobs don't turn the correct way. But this doesn't seem to effect the operation of the system.


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HvyEng Full Member Offline Posts: 33 Joined: Dec 11^th, 2010	Re: Fuel usage? Reply #3 - Dec 16^th, 2010 at 1:08am	Print Post
	As general rule, if the "V" point towards the flowline, the pumps are on, if it crosses, they are off. If the line crosses the flow line, the valve is closed, if it lines up, it is open. I modified the textures to add the missing flowlines and valve lines, but the admin has not returned my message to let me know if it is OK to release it or not. In the attached photo, the left external is feeding engines 7 & 8 R Outboard and R external are deadheading (pressure but no flow) and Pylons 1,2,and3 are being fed by their respective main tank. Remember "Source-Force-and-A-Place-to-Go. --Dan

	FuelPanel_Day_001.jpg (Attachment deleted)
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Markoz CS Team Offline Posts: 12372 Location: Victoria, Australia Joined: Apr 24^th, 2009 Gender:	Re: Fuel usage? Reply #4 - Dec 16^th, 2010 at 4:36am	Print Post
	Hi Dan. Because some of the flow lines are missing, it isn't always easy to tell iff the are on or not. Some of the Fuel Tank Pump Switches are horizontal, others vertical. Same applies to the Crossflow Valve Switches. As a general rule, I have been using them as you have said, if it doesn't point/follow the lines, it must be off. So far it seems to be correct. Mark

	Mark Fletcher PC: i7 10700K @3.8/5.1GHz \| 64GB DDR4 3200 \| 12GB RTX 4070 Super \| 32" LCD Monitor \| 1TB SSD & 2x2TB SSD \| Win 11 Pro - FSX/FSX-SE/P3D3/P3D4/P3D5/P3D6/MSFS2020 15.6" Gaming Laptop: i7 7700HQ \| 32GB DDR4 \| 6GB GTX 1060 \| 256GB SSD & 1TB HDD \| Win 10 Pro 64bit - FSX-SE/P3D4
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HvyEng Full Member Offline Posts: 33 Joined: Dec 11^th, 2010	Re: Fuel usage? Reply #5 - Dec 16^th, 2010 at 5:23am	Print Post
	Super-Duper decoder key: All fuel valves are shaped and oriented the same way (Boeings KISS). Vertical is on (matches the flow lines); Horizontal is off, (crosses the flow lines). All wing tank and the aft body fuel pumps have a "V" shape, and are positioned vertically. Points away= pumps on. Crosses the line = off. FWD, CTR, MID body tank fuel pumps have a "V" shape, and are positioned horizontally. Points away= pumps on. Crosses the line = off. There is a method to the madness, the missing flowlines only really help dicipher where in the manifold the lines enter. Remember, this system was designed so a co-pilot couldn't screw it up. As soon as I get approval from Captain Sim I will post the .dds files fixing the fuel lines & lights. --Dan


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Lost in Isaan Senior Member Offline Posts: 325 Location: Udon Thani, THAILAND Joined: Dec 11^th, 2009	Re: Fuel usage? Reply #6 - Dec 21^st, 2010 at 2:57am	Print Post
	Thank you Dan for your efforts, in the mean can you tell us how you managed this camera angle? I find the co-pilots yoke very annoying when trying to access the fuel panels.

	Regards Bruce This message has been sent from my 1977 Apple II using 2 Hinze bake bean cans and piano wire!
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HvyEng Full Member Offline Posts: 33 Joined: Dec 11^th, 2010	Re: Fuel usage? Reply #7 - Dec 21^st, 2010 at 9:39pm	Print Post
	No worries, I hope they help. For the fuel panel view, install the cameras views located here: http://www.captainsim.org/yabb2/YaBB.pl?num=1292190724 Then right click anywhere and select Cockpit -> Fuel Panel --Dan


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