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Fuel Mis-management C55Baron

ABS Full Member
Posts: 0

After a short sector where I had wanted to use aux fuel I inadvertently landed with aux tanks selected. Short turnaround, rushing, I did not check Main tanks selected for Take-off until I commenced take-off roll. I selected both tanks to mains and both engines quit halfway through the take-off roll. I have learnt a valuable lesson!!
I am looking for input as from my knowledge of the fuel system the mains lead straight to the selectors at the lowest point of the system. I find it strange that an airlock could develop.
The last time I ran an aux tank dry I was a little surprised how long it took to get the engine running after selecting mains.
Thanks,
Phil

Model: Baron 95-C55
Posted 3/29/2017 - 3 years ago
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ABS Full Member
Posts: 1072

The proper procedure is to turn the boost pump on when selecting a new tank.
The main tanks are used for T/O and landing because they have baffles in them to trap fuel at the inboard end and not allow the fuel to be pushed outboard during a turn or maneuvering in the pattern.
It is also good practice to select the tank you are going to use for take off and not change it until at a safe altitude, this way if there it is an issue it will probably show up during taxi and run up procedures.

Posted 3/30/2017 - 3 years ago
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ABS Full Member
Posts: 1076

The independently selectable auxiliary fuel tanks are limited to use in level flight only per Section II of the Pilot's Operating Handbook. Because of the location of the fuel pick-ups in the aux tanks, it is possible to get a fuel unporting situation under acceleration or when in anything other than a level flight attitude. There have been numerous Baron crashes attributed by the NTSB to attempted takeoff, go-around, or missed approach with one or both engines in the AUX position.

You might review the Fuel System - Baron/Travel Air segment of the Beechcraft Systems, Procedures and Techniques course ("BPPP Initial"), free to members in the ABS Online Learning Center. You may decide to complete the entire course, and even add flight instruction with a Baron-expert BPPP flight instructor. Regardless, please know and observe the Limitations that apply to your airplane to enjoy a long and uneventful (at least in a negative sense) Beech ownership.

Posted 3/30/2017 - 3 years ago
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ABS Full Member
Posts: 71

Main tanks are forward of the main spar and the fuel outlets are at the rear of the tanks.
The aux tanks are aft of the spar and the outlets are at the forward part of the tanks.
Acceleration keeps fuel available at the main tanks outlets and fuel away from the aux tank outlets.

Posted 4/10/2017 - 3 years ago
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Approved by Thomas Turner
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Fuel Mis-management C55Baron