Thank you for your input but this forum is not for technical support.
If you want your report to be forwarded to development team for consideration please check-in to Your Profile then click Product Name > Customer Support > to submit a Ticket. Thank you for cooperation.

jeffg wrote on Sep 10^th, 2010 at 8:22pm:


Jeff your wasting your breath,
CS have by far (IMO) have done there greatest job on the 707 but never bother with there silly canned answers.

speck wrote on Sep 11^th, 2010 at 6:40pm:

After seeing your post, I went and tried it. Yes I can. This was how the fuel was distributed in the tanks:

Left Aux     100%
Left              0%
Center          0%
Right            0%
Right Aux    100%
Left Tip      100%
Right Tip    100%

I COULD NOT start the engines if:
(1) only the Left Aux had fuel (100%)
(2) only the Right Aux had fuel (100%)
(3) only the Left Tip had fuel (100%)
(4) only the Right Tip had fuel (100%)

I COULD start the engines if:
(1) only the Left had fuel (1% 272.6 lbs)
(2) only the Right had fuel (1% 272.6 lbs)
(3) only the Center had fuel (0.4% 306 lbs)
(4) if the Left Aux and Right Aux tanks both had fuel (0.9% 140.1 lbs each)
(5) if the Left Tip and Right Tip tanks both had fuel (4.8% 141.2 lbs each)

The fuel Boost Pumps for the tanks that have fuel must be turned ON. NO fuel in tank, NO fuel boost pumps. The fuel Boost Pumps for the Left Aux will also pump the fuel from the Left Tip into the Left Aux first. The same applies for the fuel Boost Pumps for the Right Aux pumping fuel from the Right Tip to the Right Aux first.

Of course any single tank with fuel (excepting the Center Tank) is NOT a good idea.

Mark

Remember the estimated fuel burn the default FS flight planner gives you is wrong. I've found the figure given is approximately 130% the fuel burned by one engine. My formula for fuel planning is (( FS estimated fuel burn x 0.75) x 4 ) + total / estimated trip time.

That usually gives me enough fuel for taxi and then a missed approach and a TOGA or two

For longer trips I multiply cruise time (usually trip time - 1 hour) by fuel burn rate at chosen FL, for more precise and optimised fuel planning.

As for fuel distribution, I follow the procedure as detailed in the manual to the letter. Hasn't failed me so far.

Cheers

Nico

The only way to start the engines without external services, that I know of, is CTRL+E. Unfortunately that may not start all the engines. Luckily, with three engines running you can start the stubborn engine (at least you should be able to).

Mark