Originally Posted by
madmikepags
OK higher voltage setups are more efficeint, My 2S rigger pulls almost 6000mah in a minute and 10 second race, My 10S rigger uses a little over 3000 mah for the same race time. Also what Brand of batts are you running? 50C 70c doesn't tell me much. If you are going to be running hot setups good batteries are a must. Try Giant Power batteries, the new Graphene cells are pretty amazing, if I were you I would use 2 6S or 8S 5000'mah in paralell, If you are going to be running a 6-8 cell setup I would recommend a bigger hull, 33" gets pretty small when using 6-8 cells. The way to do it is to parallel your cells so you have double the Mah. This is not necessarily to get more runtime but to put less stress on your batteries. When you have 10,000 mah the cells dont work as hard and you have less voltage drop under load. I would recommend using NEU motors, but if its too steep for you, TP motors are a very good alternative. When I am building a new boat (and I have built many) I have a few guidelines. For any cell count 4S 6S 8S and 10S I have RPM range that I shoot for which is between 27 and 32,000 rpm. so 4S= 1800-2200kv, 6s=1250-1400kv 8s=100-1100kv and 10S=780-850kv.These are tried and true setups very safe and fast if you do your homework and use the right equipment. I also try to use a hull size to fit the power. If you use a 8S setup in a 33" boat, the correct prop for the RPM will be way too big for the size of the hull, and therefore the hull wont run properly. For 6S I would recommend a 38-40" hull and for 8s 40"-44'. And so you know you cannot just go higher voltage with the same motor and prop, you need to change either your Kv of your motor or your prop size, with all things being equal, for example an 8S setup turning 30,000 rpm will be much more efficient than a 4S setup turning the same rpm. The 8S will also be faster because you will have more power, and less voltage drop under load. There are so many diff variables though, prop, driving style, type of hull, CG, the way the boat is trimmed etc etc....
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