So that's at the "back" of the tank---in other words, the backplate?
The reason I ask, is that I would expect the plane to
probably be flying with the nose slightly pointed outwards--and that would tend to throw the fuel towards the front of the tank. So if you want every bitty little drop, wouldn't the front be a better place?
Like I mentioned in my other post, for our "Coxy Hazel" race, it is vital to get ~34-35 laps per tank, since at least 2 pits are required for the 100 lap race, so I apologize in advance if I am sounding too picky here!
For example, sometimes I will angle a stunt tank so the pickup end is pushed out ~1/8" further outboard than the front of the tank, so that when the pickup really goes dry, the engine will usually shutoff cleanly. Otherwise when if the fuel is pooling near the front, when the rear pickup goes dry, and the engine "burps", the nose will wing inboard a bit, letting the remaining fuel slosh back to the back, and then the engine picks up. And of course this can go on for some laps--sometimes. Sorry for the digression.