Large Scale 1/4 scale 6' long catamaran brushless & I am new to lipo
I bought a large scale catamaran several years ago and have over time put pieces together to make something I hope is awesome. Along the way I decided to go electric brushless with this set up after seeing several you tube videos of other boats like this. I am planning to run two drive systems. Each drive will have a castle 2028 780kv motor. These are the older models that are not sensored motors. I have purchased two fightercat 400 amp water cooled ESCs and counter rotating 1/4" prop shafts. The props I picked up are 5 bladed props measuring 67mm (2.64") dia and have a pitch of 114mm (4.49"). I have been to my local hobby store as well as the chain hobby store that's in a town an hour away, neither were able to give any recommendations on tips for building this boat. I just got off the phone with Castle Creations who was also not able to give a recommendation, but they directed me here. I am mainly asking what batteries should I be looking at? I was planning to go with 8s Lipo. If my calculations are correct then my 780kv motors should turn about 23088rpm and with the 4.49 pitch props I should see speeds around 78.53 MPH. adjusting for 20% prop slip. So, any recommendations on batteries, size, brand, everything, or any input about the equipment that I already have that could be a bad choice and need changing before I start please let me know. Thanks!