Hello friends.

Could anybody explain how to set the fuel panel (boost pumps, crossfeed valves) when my central tank is empty?

Thanks in advance and happy new year everybody.

The idea is to use the Center Tank until it is equal to the Left and Right fuel tanks, and then to use all the tanks from that point on.

On the fuel panel are three Fuel Crossfeed Manifold Valve Switches, turn the Left and Right ones ON (in the horizontal). Turn OFF the FWD and AFT Fuel Boost Pumps for the Left and Right fuel tanks. See upper part of the image.

Once the Center Tank is about the same amount of fuel as the Left and Right Tanks, turn ON the FWD and AFT Fuel Boost Pumps for the Left and Right fuel tanks and then turn of the Left and Right Fuel Crossfeed Manifold Valve Switches. See the lower part of image.

Hope this helps.

Mark

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Mark,
thanks for your reply.

Maybe I'm missing something, but I generally load the center tank only if the wing tanks are full. So I will never have the situation stated above.

My question is now: must ALL the three tanks always have some fuel in? Or may I plan a flight with only wing tanks partially loaded? And, in such case, what configuration should I adopt in my fuel panel?

Thanks again mate!

Going by the information provided by some former 727 pilots, all three tanks must have fuel in them. So if you need to 21000 lbs of fuel for a flight, you put 7000 lbs in all three fuel tanks. If you are going to need more than ~36000 lbs of fuel, the extra has to go into the center tank and the above rule applies.

Mark

Rosario -

As I understand it from guys who have actually flown the 727, you fill the tanks evenly until the wings are full, then keep filling the center tank as needed. Filling only the center tank would put undue stress on the wings...big heavy fuselage and light wings is not good.

For takeoff and landing you're supposed to feed "tank to engine" for safety (so that failure of one fuel system doesn't rob all of your power).

So, as Mark indicated you should set the fuel panel as follows:

1) Feed "tank to engine" (crossfeeds closed and all boost pumps on) for takeoff,

2) After takeoff, shift to burning center tank (crossfeeds open and wing tank boost pumps off) until tanks are all equal.

3) Then go back to feeding "tank to engine" by closing the crossfeeds and turning the wing tank boost pumps back on until you land.

Of course, it's just a simulator, so if you want to run center tank only you can set it up as discribed in #2 above from the beginning. You could also just fill the wing tanks and run the center off of them by opening the crossfeeds and turning off the center boost pumps. Just not how it's done in the real world.

Matt, i was supposing to fill only the wing tanks leaving the central empty, as in modern airliners, not to fill central tank only.

Anyway, you guys gave me the info I was looking for.
Thanks Mark and Matt for your kind explaination.

Have a nice day.  :)

There is some extra cooling done with the center tank fuel (the fuel cools other liquids) so don't let that one run dry.
Mark pointed that out here http://www.captainsim.org/yabb2/YaBB.pl?num=1280221924.

Fuel management in the 727

http://home.comcast.net/~lou.lynn/727-fuel-system.jpg


FUELING
1. Fill ALL tanks equally until wings are full (automatic shutoff.)
2. Remaining fuel goes in center tank.

FUEL USAGE
- Fuel in center tank more than wings:
1. Start engines, Taxi & Takeoff - ALL boost pumps ON, all X-FEEDS open.
(The center fuel boost pumps create a higher pressure than the wing boost pumps (4 vs 2 + slightly larger) so fuel will burn from center tank)
2. Before 3,000 pounds are burned, start a cross feed from center tank to ALL engines. This is for CG & structural reasons.
       Ignition ON
       All boost pumps ON
       All X-FEEDS open
       Turn off boost pumps in tank #1 while watching engine instruments
       When engine stabilized, Turn off boost pumps in tank #3.
       When engine stabilized - ignition OFF
       Monitor fuel burn
When fuel in center tank equals wing tanks:
       ALL boost pumps on
       Close #1 & #3 X-FEED valves

http://home.comcast.net/~lou.lynn/727fuel.jpg


Note: Boeing planes ONLY cross feed fuel to engines, you cannot transfer fuel from tank to tank. So if you have an engine failure of engine 1 or 3 you will have to cross feed fuel from the wing tank of the dead engine every once in a while to keep the wings within balance. Same if engine 2 were to fail, you would have to cross feed out of the center tank periodically to keep the tanks even.

During fuel dump the same is true. You must dump just like the normal fuel use procedure. If the fuel in center tank is greater than the wings you must dump from the center tank first, until equal, then you can dump from all three tanks. You will still have to monitor fuel balance as fuel will dump faster from the center tank than the wing tanks.

http://home.comcast.net/~lou.lynn/727FE.jpg

Thank you all for the kind feedback, a lot of precious infos here.

Happy new year all!

Great stuff Lou, thanks!

This thread should be made into a sticky if this forum software has that feature.

Great info.  

Sadly, the CS 727 doesn't quite act like it should. If I leave ALL Fuel Pumps ON and ALL Fuel Crossflow Valves OPEN, then the 727 will alternate from tank to tank with the fuel supply. It will start of with a couple of thousand pounds feeding from the Left Wing Tank, followed by a couple of thousand pounds feeding from the Center Tank, followed by a couple of thousand pounds feeding from the Right Tank (or something like that). Then the cycle starts again. :(

Mark

Hey Pilots!

I write here because I cant open a new thread and I read this thread because I am new to the CS727 and I wanted to know how the fuel distribution is working...
but now I have the problem that my engines run out of fuel on every flight (all three at the same time).

My fuel load:
8000lbs in LEFT - CENTER - RIGHT

After startup I had all booster pumps ON and all the Crossfeeds OPEN (Selector is Vertical).
The Engines take the fuel just out of the center tank, and when the center tank is empty, all engines die.

Any suggestions for propper management?
FSX Gold Edition and the newest version of the 727 - SP 2.7

Thank you very much

Good Evening,

When you start with balanced fuel in all tanks (all have the same amount) you have to close the Crossfeed Valve No. 1 and 3 to burn the fuel uniformly.

I hope this helps  :)

After installing the last update I found that I could not shut down my central feed and allow the engines to feed off the L & R tanks until I was balanced.

Reloaded the program 3x, tried different scenarios, and still had same results - no control.

Another thing I noted was the tank switches were in the wrong position from the initial start.  They starting in the closed position when they should be in the open position.

I even loaded a HJG 727 fuel panel and could gain control of the fuel switches but not with the CS727 panel.

This isn't a fuel management question just trying to get some action on my questions and this is the most recently used forum.


Hey guys have a few problems with 727.  I have no sounds in the cockpit for any switches or the apu.  I only get engine sounds.  Also the flight director and autopilot will not work.   When I flip a switch on either one they just snap back to the off position.  Won't do heading hold altitude hold and the GPS/NAV switch does nothing.  The alieron and elevator paddles do stay on but with no control.   Haven't had these problems before.   I do have ASN and sim physics running as well as air hauler.

Hi davis20.

It sounds to me like the Activation didn't work correctly. Reinstall the 727 Base Pack, and select "Repair", then start FSX, and see if they are working. If that doesn't fix the problem, then will need to do a complete uninstall/reinstall of the 727 Base Pack as described in KB #685. This requires the removal of the p727 entry in the Windows Registry, then when you reinstall, you need to activate it again (I recommend using the Manual Offline Activation method), and that should fix the problem.

---------------------------------------------------

KB #685:

Q: How to reinstall a product?

A: Quite a number of "issues" are caused by using of outdated version of a product. Prior to submitting a support request please make sure you have current version of a product.

To reinstall a product please perform the following steps in exact order:
Uninstall the product:
1. Go to Start> Programs> Captain Sim.
2. Select the product you wish to uninstall.
3. Click uninstall icon.

Install the product:
4. Make sure you have the latest version of the product
5. Run the product installer (the .exe file) and follow the prompts.
Please note: valid Order Number and Internet connection are required for installation/activation.

Please make sure you run the installation file as Administrator and that "User Account Control" is disabled (for Vista and Windows7), it limits admins ability to install programs.

If regular reinstall did not fix your problem you can try to clean registry.
Please be careful and do it on your own risk!

How to clean Registry:
1. Uninstall the product
2. Go to Start> Run. Type: regedit, click OK.
3. Find the product entry in HKEY_LOCAL_MACHINE\SOFTWARE\CaptainSim\ (please note, for Windows 64bit versions it is HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\CaptainSim\)
For example: HKEY_LOCAL_MACHINE\SOFTWARE\CaptainSim\C130XPRO
Make sure you are going to delete correct folder!
4. Delete the product entry folder.
5. Restart your computer.
6. Install the product.

If you stil have issues and the above does not help we must admit your system configuration is a rare exception. You can try to install the product on another system or request a refund.

From: General / Download/Installation (QID 685)

---------------------------------------------------

The part that you need to follow, very carefully, is under How to clean Registry:. It is there that you need to remove the p727 entry.

After doing the above I now have all the sounds.   However the autopilot and flight director still do not work.   It's like the switches are spring loaded.   I hit the switch and the immediately such back off.

Figured it out.   It was a cold and dark problem (avionics  switch)  loaded the 172 turned on the avionics re saved and good to go

I'm happy to hear that you got it sorted out.

With most Captain Sim aircraft, I start off with the Cold and dark C172, but with the Avionics Switch ON. This prevents the Avionics from being OFF on their aircraft that don't have an Avionics Switch.

Hi I kow yor discussion is very far from Waht I need, please tell me how to fuel  up the plane as a first step. Thanks

Hi I kow yor discussion is very far from Waht I need, please tell me how to fuel  up the plane as a first step. Thanks