I have cut sheet metal for a tank that fits in the baggage compartment snug up against the rear seats and does not impinge much on the door opening. It will hold a little over 16 gallons if my math is correct.
I plan to plumb it into a T fitting in the left wing root on the return fuel line of my FLY EFII system and to put a check valve in the line to the rear tank.
My plan is that after flying 1+ hours on the left tank, switch to the right tank, pump from rear tank to left tank Fly-EFII return line. One end of the return line goes to the Andair duplex fuel valve which will act as a block when turned to right tank feed. The other end of the return line feeds into the left tank. This is where the fuel will exit. Evidence of filling can be seen on the left fuel gauge. I could add evidence of tank depletion by adding a float to the extra tank and feeding it to the EFIS.
I may put the pump on an automatic timer and switch.
I like evidence of the left tank filling because that is really what you want to see.
The tank will be removeable and probably only used on flights that may push normal IFR reserves for added safety and longer VFR flights.
It keeps the weight off the wing and is centered.
- Added weight in baggage compartment of the fuel. Under 100 pounds.
- Impacts CG, which may be a positive on a RV-10
- Fuel in the cabin.
- Pumping into a full tank and spilling out the vent line.
I know of one other that has done this 2 times and it has worked out well.
Builders Blog http://elstien.us/wordpress/
Tail Kit delivered 6-2013
Finished QB wings on September 2018
Moved to Port Orange Florida November 2018
Tailcone mounted to Fuselage on 3-1-2020
Finished Fuselage April / May 2020
Working working working on Doors
Engine Ordered (BPA/Fly-EFII 8/1/2020
Dues Paid through 2021