Thunder does not accept 337 time?

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pelmet
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Re: Thunder does not accept 337 time?

Post by pelmet »

iflyforpie wrote:Lots of 337 accidents come from fuel mismanagement. Most 337 operations are at maximum endurance, and fuel tanks must be changed at the correct time. Change to auxiliaries too soon, and the excess goes out the main vents. Blow the main tanks, and you have no way to get the fuel out of the auxilliaries since they have no boost pumps. The fact that the engines are front and rear and the tanks and pumps are right and left further confuses things.

If you blow a main tank, the unofficial procedure is to immediately switch both engines to aux. That way you might keep one engine going. Then after identifying the failed engine by instruments and verifying with throttle, you swap the dead engine to cross feed because the nearly empty main tank from the running engine is now being filled with the return from the aux. Then you turn on the opposite boost pump and restart the failed engine, get it running, then switch it to aux because the engine pump is now primed.
Very true that one should be careful.....or.....operate a 337 with long range tanks. One tank in each wing(not true...it is actually four interconnected tanks acting as one) with 74 gallons usable each and no tank switching required. So simple. Fuel dipsticks don't work on these though with the fuel tank filler port way outboard on the wing.
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