Twin outboard center console build

[Tamelesstgr]

Post #139 has a video

[Banzee]

You got no video of that superb build ???

[johnf]

Super cool!

[ScarabChris]

Thanks!

Here are a few still shots.

[Make-a-Wake]

That is awesome! This is one of the coolest builds i've seen on here............... Love the sound of the motors, just need a little driver now!! Great job!

[ScarabChris]

This project is insane and I want to see it do wheelies like no other TURN ME ON!!!!

This is my idol: http://www.youtube.com/watch?v=hSufU...ext=1&index=31

So is this guy.

http://www.youtube.com/watch?v=kAVY9xNWrUk

I can't compete with those dudes but here is the video of the Scarab running on the brushless system. The video doesn't do it justice, this little thing screams for the type of setup. This is running the counter rotating 32mm 3 blade Venom props. Today I'm going to try the 36mm props and see what happens.

http://www.youtube.com/watch?v=YCilsao6d8k

[ScarabChris]

Thanks guys for the compliments. When I started this project I knew very little about a real electric RC boat. This brushless thing is new to me and didn't even know it existed until I got into RC helicopters a few months back. I have learned a lot from you guys.

Nice work!!! BTW, what kv motors did you end up with?.................went back over the thread and didnt see it. I see you have those slick 3 blades on it!

I chucked the boxes already but I think they were 2400 kv? Does that sound right? Whatever they are they run like a stuck pig. The props are Venom 32mm counter rotating. They are plastic. I have the aluminum ones on order but they have no idea when they will be in. I am going to try the 36mm props too. I have them in plastic just like these.

Nice work... Just so you know... you can sand those intakes down flush with the bottom and you'll have less drag, and PLENTY of water pressure for the cooling. Flush is how most people do this type of intake.

I don't know about sanding them flush, I thought about it but as it is there is just a dribble coming out of each thru hull discharge. I'll have to run it a few more times in a more wide open space to see.

Drag or not this boat runs way faster than I need it to. 3/4 throttle is fast enough. Full throttle is just silly.

But at full throttle this little hull is super stable, never once did I think it was going to get squirrely, even in hard turns it stays hooked in the water.

Great running hull this little Challenger is. I'm going to shoot some pictures to Remy at Aeromarine once its all done. When I was explaining what I wanted to do I'm not sure he was on the same page.

[BILL OXIDEAN]

This project is insane and I want to see it do wheelies like no other TURN ME ON!!!!

This is my idol: http://www.youtube.com/watch?v=hSufU...ext=1&index=31

So is this guy.

http://www.youtube.com/watch?v=kAVY9xNWrUk

[JMSCARD]

wow you do very nice work chris... cant wait to see her run!!!!!!!!

[Darin Jordan]

Thru hull intakes. Simple piece of brass tubing epoxied into the hull bottom and a sharp angle.

Nice work... Just so you know... you can sand those intakes down flush with the bottom and you'll have less drag, and PLENTY of water pressure for the cooling. Flush is how most people do this type of intake.

[Make-a-Wake]

Nice work!!! BTW, what kv motors did you end up with?.................went back over the thread and didnt see it. I see you have those slick 3 blades on it!

[ScarabChris]

The rest....can only put 6 images in one post.


............ESC cooling.....also works great. Each ESC has its own intake and discharge. Not a huge stream of water shooting but it looks like enough for this setup.



Thru hull intakes. Simple piece of brass tubing epoxied into the hull bottom and a sharp angle.




I am very happy with the outcome. The sound alone they make is cool. Stand by for a video, I'll get that done this weekend.

[ScarabChris]

Cant wait to see her run with the twin BL's..........

Oh its freakin awsome!! Found out both my batteries were bad. Thats from running the boat on the brushed motors with no kind of low voltage protection. So I went to my LHS and grabbed a pair of 3800 mAh 30c 11.1v LiPos.

Damn...the boat is smokin fast now. Best part is I can go as slow as a dead idle or as fast as I'm guessing somewhere between 30 and 35 MPH, maybe even 40. Its tough to tell with the boat coming at you in my canal.

Now for the repower pictures.

Stripped down....




New power plants. New gears in both lower units and a super thick liquid lubricant in the gears instead of grease. Lets see how long they last.



Lower units on and ESCs installed..




Brushless motors installed, the water cooling works perfect. I held the boat in place in the pool and gave it about 1/4 throttle and there was a healthy stream of water shooting out the discharge hole.

[Make-a-Wake]

Cant wait to see her run with the twin BL's..........

[ScarabChris]

Yup....salt water, I'm surrounded by it. I usually take my RC boats out in the real boat and run them while hanging out at the local watering hole.

I have a pressurized fresh water system on my real boat. I'm going to make a rig so I can run fresh water through all the components on the RC boat immediately after a run.