cygnusx1

I just received the hull, and I am impressed with the quality. The plan is to do a single Tekin T8 motor, which I had laying around, and a 180AMP ESC from Offshore Electrics. It will run on 5 or 6 cells. I am waiting for all the drive componenets coming from Hong Kong. Meanwhile, I began decorating the hull, and figuring out how to make a water cooling jacket for a finned motor, designed for air cooling!

Enjoy the photos.

roadrashracing2

You might want try less cells with that motor or get a low kv motor to run 5-6 cell lipo.

cygnusx1

You think? It's a 2250kv motor. Will 5S-6S over spin it? I used to run it on 4S but with 5S everything seemed to run cooler...if that's possible.

EDIT: Yup. This page spells it out nicely.

http://www.radiocontrolinfo.com/rc-b...ss-boat-motor/

roadrashracing2

Go with a motor with a cooling jacket and motor like this and you will be a lot more happy, just not sure how good your homemade stuff would work.

http://www.offshoreelectrics.com/pro...artan-Combo-v3

leothegreat

iTrader: (3)

Excited to see the completed boat

cygnusx1

Some updates.

I did some more graphics on the hull in silver carbon vinyl, and white pin striping.

I received the hardware and installed it. I made a backing plate out of Delrin to help support the rudder/strut. I installed the drive tube and shaft. I completed the cooling jacket for the Tekin, and it holds pressure. It also has a lot more volume than the typical cooling jacket which is good for burst cooling. But, I did decide to pickup a different motor too. I will complete the boat with the Tekin motor, but I will switch to the leopard motor when I am more comfortable with the boat.

The Leopard is a 4200 watt 4-pole unit 1480kv. That's about 5.6 Horsepower on 6S at 115 amps. I got a good deal on ebay for it. I think it's too much power but we shall see.

cygnusx1

The motor was too high for the cowl, so I cut and lowered the "firewall", and removed some ply from directly under the motor, for clearance.




Rear battery location gives a good CG location.



Used a Traxxas truck box to keep the Rx dry, and the wiring tidy.



Ready for Spring.

roadrashracing2

Turned out nice.

Pintobean11

iTrader: (17)

Excellent build, should be fast as hell.

cygnusx1

Well, you be the judge. It still needs some strut angle and depth adjusting, and I think the rudder is a tad too small, but when it settles in a straight line...

+ YouTube Video

https://www.youtube.com/watch?v=_HPXtfW6Kdg

Build tip:
Add glass reinforcement under the deck, around the four corners of the hatch opening. It begins to crack there rather quickly.

TIME MACHINE

iTrader: (74)

That's one heckuva' boat. Like a fine piece of art!