my own models are both twin shaft / motor , they are running on 10 inch shafts with the motors placed in the engine room as per full sized vessels . the huntsman has a pair of 777 brushed motors , however im unable to get it planing very well unless im running on 22 volts ! the spear ( white cabin behind the huntsman in my avatar ) has a pair of turnigy 1000kv brushless motors two esc and is powered from a pair of 11.1 volt lipo batteries which power it to a scale speed