Gas to Electric

[bjrunon]

I have gas boat I'm thing about changing over to electric, it has a Dynamite .32, 28.000 rpm engine. Boat Specifications
Length: Hull- 31.8 in (808mm) Overall- 36 in (914mm)
Beam: 11.6 in (295mm)
Hull Material: Fiberglass composite
Prop Size: 1.6 X 2.5 3/16 in shaft (PRB0151)
Hull Type: Catamara

Can anyone advise me of what motor, controller, batteries and charger I would need to do this and if its worth doing. Thanks Rob :)

[freechip]

To replace your 28000rpm gas motor, you would need a 3800kv-4000kv motor if your running on 2s LIPO and 2500kv-2700kv motor on a 3s LIPO. or 2000kv motor if your running twin pack 7.4v Lipo. As for the control all depends on how much amp your setup would draw. But a good water cooled control in the 100amp range should do the trick and with battery wells you can take your pic.

[cyberhoops]

Personally I think it is always worth going electric.

For that size of boat I would use 4s Lipo power (14.8 volts) - either as two packs of 2s lipo in series or a single 4s battery depending on what fits nicely in the boat. I would go with something in the range of 4000mah to 5000mah. Depending on the source of the batteries they will be about $200 for 4000mah batteries from someplace like MaxAmps.

For a motor I think there are lots of good options - depending on what you want to spend.

In the simple case I would just pick up a Proboat 3630-1500 brushless motor, controller and programming card that is used in the Blackjack boat. That would get you a 45 amp system and probably use the Graupner 40mm carbon fiber prop or maybe the 45mm carbon fiber prop. This would stay under $200 for the motor and speed control.

Going up a level I might pick the ETTI Navy 100amp speed control and maybe a Ferigo 540 9XL motor. Now we are talking closer to $300.

If the sky is the limit, then ETTI Navy 150 amp speed control with a BEC and a NEU 1515 1Y or NEU 1512 2D. This setup probably will need 5000mah or more for the batteries. This setup will be about $400.

Since you probably already have a receiver battery you could get away from having a BEC in the speed control if you so desired. I think I would still get an ESC with a BEC just for the weight and future use.

That would be my choices from the many possible options.