RE: Tank facing location for pusherprop
Hi!
You fill a bubble less tank the same way an ordinary R/C tank...using an electric fuelpump or mechanical fuel pump. You certainly dont have to suck out any air before you fill it up!
I have done this for 15 years in F3D and Sport 40 without any problems.
I admit that the best way is to fill it up using a syringe sucking out the air first...but in practise you don't have to bother sucking any air out at all ...just fill it as with an ordinary tank!!