Jo,
> The attached photos are of my first attempt to building a "semi-scale"
> outboard motor for the 1/5th scale boats ......
> Exact scale is not possible.The exterior dimensions of the semi-scale
> motors are dictated by the motor/motor mount and lower units already
> available.
> I know this outboard drive system with the cable driveworks very
> well.Bevel gear systems are not reliable over extended periods of
> use especially being used at 35,000 rpm plus.
> As I told you I am currently attempting to build a "semi-scale"Mercury
> 20H on a K&B lower leg for use on the 152VO boats.
> I am building the 20H for use on a 1/5th scale Sid-Craft runabout that
> is also in the works......
Specifications:
Turnigy 4400KV outrunner motor
REK/IRWIN composite lower unit
Redneck Racing motor mount.
Custom machined water-cooled motor mount adapter plate that will also provide cooling water to the ESC if required.
I have used this mounting plate design on riggers with these Turnigy motors with tremendous success with no heat problems whatsoever.
Turned down the prop shaft to 1/8" to accommodate smaller 1/8" hub props. Turnigy offers these same exact motors in several KV values. A wide variety of RPM ranges will be available to the user with 2S and 3S batteries.