Maine Downeast Lobster Boat

[John Green]

Hi there, those are nice looking boats. Thanks for the info, I haven't had any time to fine tune mine lately but the last time I ran it at 75% power the speed control got quite hot. I am guessing it was going in the 30 mph range and was stable if you turned slowly. The chines look very similar to yours. How and what kind of water cooling inlets are you using? I will send you some pics in the near future.

Thanks

[tebby2]

I'm using a 12 volt diaphragm pump connected to a Octura streamlined water pickup. The pickup is installed aft of the propeller, just to the starboard side of the centerline, and forward of the rudder. Natural unassisted water flow was insufficient to maintain satisfactory temperatures (<115F motor/ESC at 75F sea temps). I use a buck-boost voltage regulator inline with the pump to maintain its 12 volt supply - which also allows for different voltage battery packs. Also keep in mind that high amperage loads generate lots of heat. It is always more efficient to use a low KV motor and use a higher voltage battery pack. A slower turning motor can be coupled to a larger prop which is always more efficient that a fast turning smaller prop.

I also have an Aeromarine Challenger 43 that is powered with a TP Power 4070 440Kv motor on two 10,000 6S Lipos in series (12S) and does 50+ mph, This boat pulls less than 70 amps to get on plane, and cruises at less than 30 amps. Natural water circulation cools the motor and ESC to less than 100F with 75F sea water temperatures.