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Building Integrity
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Date:  10-28-2013
Number of Hours:  6.00
Manual Reference:  ch 21
Brief Description:  Low Point and crossflow fuel line

First off, the nose was lowered all the way, the Fuel Drain hardpoint was then glassed with 2 plies BID over the top and the whole area filled with Wet Micro. The Micro was more challenging than I thought in that I had to use a lot of Heat in order to see it spread out with gravity. Otherwise it would have taken much longer to verify the waterline. This caused a problem in that the heat caused exotherm on only some of the areas heated the most. The areas affected were fine until I went to add more micro in attempt to get the perfect waterline and the new Micro would sink while the semi cured would rise to the top. STRANGE stuff. It would then get really lumpy. I eventually dug out the lumpy and replaced it with new micro and chose not to heat it. All is well.
Now for the next task, let me explain pic #3. I have spent countless hours considering my fuel system and obsticles that the plans didn't address and the conclusion is actually Very simple. My engine is EFI and pumps a massive 26 gallons per hour through the fuel system at a constant 43PSI. This means that a LOT of fuel is returned into the tanks. Now the IDEAL setup would include a 4 port Andair fuel valve that would allow the tank that is being used to get the return fuel sent back to it, however I am NOT a fan of 7 fuel lines running through the cabin. I decided to send ALL the returned fuel into the left strake only and coming right from the engine. The theory is that when I use my fuel valve in the "both" position, no matter where the return fuel goes, the higher head pressures from the fullest tank will push more fuel through the lines than through the tank that is "less full" if you will. So what happens if I need to select the right tank only and all that returned fuel is going to the left tank? Simple... continued on next page...
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low point hardpoint glass

low point hardpoint glass

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Micro shelf raising the waterline

Micro shelf raising the waterline

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Cross flow fuel line

Cross flow fuel line

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