I’m building a Robbe U47 my questions is batteries. I have a space issue in the WTC due to using an Engel 825 ml piston tank. I will be using a Robbe Rokraft 120æP Controller, with the motors being brushed Graupner SPEED 400 7, 2 V and have them set up in a Ships N Things Double Fixed ratio: 3to1 frame. With that said it the NiMh vs. Li-Po. What I have read says must use NiMh 7.2V, but at a local R/C hobby shop they said I could use LiPo 7.4V. The Li-Po seams to win the size based on mAh ratio.
Understand that I must use a Li-Po battery charger, would like comments and opinions