Dual brushless motors

[H2OCamel]

two 12T Motors won't do well at all in a 40" the Villian uses those motors and they get quite hot and it is 24"?

[dana]

Yea the cost of a pair of nice brushless motors and esc's is a Lil outta my budget.... Research says it's more than I got lol... I was more or less just wanting to learn a little on running a dual brushless system...

ok well have you thought about getting a smaller hull so you can afford to power it? then you will have a fast boat too

[LarrysDrifter]

SpeedFreek, don't listen to Boaterguy. He has no clue as to what he is talking about. He is giving you false and misleading information. If you follow his information, your boat won't be running very long.

[Make-a-Wake]

quote: "two 12T Motors won't do well at all in a 40" the Villian uses those motors and they get quite hot and it is 24"?"


The Villain actually uses twin 23T titans..............AND they are geared 2:1...........it achieves 25 mph on 16.8v.........the 12t's just wont work.

[H2OCamel]

quote: "two 12T Motors won't do well at all in a 40" the Villian uses those motors and they get quite hot and it is 24"?"


The Villain actually uses twin 23T titans..............AND they are geared 2:1...........it achieves 25 mph on 16.8v.........the 12t's just wont work.

Ah yes you are right the 12t are for the cars not the boats thanks for corecting me :)

[Diegoboy]

I have wanted to try counter rotating props with one of THESE, but never got around to it.

axidouble533020motor01.jpg

[Boaterguy]

you mean on a boat? that would be interesting, but a lot of turbulence for the second prop.

[Diegoboy]

Yes, but they can be run in the same direction too

[Diegoboy]

It's been done on full scale boats of all sizes and types.

boat-stern-drive-outdrive-twin-counter-rotating-propellers-228100.jpg

islandpilot435_fourprops.jpg

ML_Benefits_of_Duoprop_566x228.jpg

The benefits of Duoprop
When Volvo Penta introduced the patented Duoprop in 1982, it was the biggest event in boating since the propeller was invented. Twin counter rotating propellers bite hard to produce unparalleled thrust, straight and true tracking - even in reverse - plus faster acceleration on the plane.

The counter rotating twin propellers eliminates the lateral forces existing in conventional single prop sterndrives. That means the engine's energy and power is concentrated on driving the boat forward - not sideways.

Straight tracking
Duoprop tracks straight. Check over the transom of any Duoprop powered boat. The evidence of cleaner, unruffled delivery of power is there in the wake.

Faster acceleration
Duoprop provides up to 30 % faster acceleration and produces a top speed some 5 % faster than any conventional single propeller system - without increasing the fuel consumption. At partial load you can expect between 10 and 12 % lower fuel consumption.


Faster planing
Better grip in the water means getting up and onto the plane faster. And staying there at lower revs.

Handling is better to
Whether at speed, round the buoys or when docking in a crowed marina. The grip is there - even when making sharp turns at high speeds. Duoprop also reduces the boats tendency to roll.

Lower vibration and noise levels
Duoprop produces lower vibration and noise levels due to the fact that the shock pulses are distributed over more blades. With its counter rotating propellers it's almost cavitation free.

[Boaterguy]

It looks interesting and that it would work, but most full size boats spin at 7000rpm max (or at least cruising boats) while our boats spin at 20 000 (under load). the cavitation from the virst prop would probably flow right through the second. It would give great bite and good running on the lower end, I just question it a top speed. Give it a try though, I'm not downplaying your ideas, it would sound neat. I think we hijacked this thread a little

[Diegoboy]

Yes we did, but it still requires 2 motors.
Here's an RC application twin duals
2002-518_k2--.jpg

[Boaterguy]

That's rc? that looks very scale and very sexy, is it yours?

[Diegoboy]

ya it's rc. Unfortunately, not mine

2002-518_k2-.jpg

hi005.jpg