Well... Miss Savannah failed her fuel flow test :-((( SPA teaches us to set the aircraft to its max climb attitude and ensure 150% fuel flow for max fuel burn rate.... in this case I needed a minimum of 12 gallons per hour at the carburetor. The factory LSA version has full time fuel pumps since the carbs are mounted on top of the engine, the Savannah can actually get its carbs above the wing tanks since she can climb so steeply. With the carb mounted under the wing, I thought I could get away with a gravity flow system, I installed a boost pump just to make sure I could get all the fuel out of the collector tank mounted behind the seat bulkhead just in case I was dumb enough to get down to my last 1.6 gallons. As you can see in the pics, with the Savannah set on her tail (max climb attitude for her) you can see that the carb is only a few inches lower that the trailing edge of the wind... so with 1/4 tank of fuel I only got 3 gallons per hour flow... not near enough! So.... I'll be installing a second electric fuel pump, one continous and one as a back up/boost pump. It flows at 22 gph at a level attitude, but I don't want to have to think about a boost pump if I begin to climb aggressively, etc. That's ok, it will be set up with a fuel managment protocol like the factory bird.
