Twin outboard center console build

[ScarabChris]

I like your vid...not sure why you would want to go faster....has a really nice scale looking speed. Faster would look out of place and a brushless motor will strip the gears even faster....been there, done that!

That last video was with the LiPo batteries and I think I smoked another motor. With the NiMH batteries its much slower. I don't want a "full race" speed but a little faster just for the "cool factor" and to not have to keep replacing junky motors.

I am currently building up a pair of EP1 lower units for a little higher performance. The gears will be submerged in high grade marine gear oil just like the real boats. The stock EP1s just have some crappy grease that gets moved out of the way by the gears.

[westbeach]

Agree with Doby, your speeds are fine. I wouldn't want to go any faster - not scale like.

[ScarabChris]

Again, that speed was with the LiPo batteries and they keep smoking the 550 motors. I could smell the motor burning from the dock. The NiMH batteries and their extra weight and less power make the boat go much slower.

Just want a little more speed than what you see in the video without smoking a motor every other run.

[befu]

New video.

Sorry this one sucks too. I was shooting and driving at the same time. Most of the video is just a nice view of the canal behind my house.
http://www.youtube.com/watch?v=v5lYZW59dhA

Nice video. By the way, I hate you

I have always wanted a Scarab since College. would love to live by the water, I do not like snow. you have a scarab, live on a beautiful looking canal and you probably do not have a snow shovel hanging anywhere in your garage. yep, I hate you.
Now that I am in a position that I could swing an offshore boat, i live in Indiana where they call puddles "lakes"! I don't have a place to run my 40" scarab that does it justice, let alone a real one

OK, you probably pay more in house insurance than I do. 4,300 sq ft and I pay around $1300 a year. Throw me a bone, do I win that one!!!!

Very nice place and the model is looking fantastic. That stinks that you are smoking motors that much.

Looked up ezrun hobbywing brushless 4300 and found some listings:

http://www.dealextreme.com/details.dx/sku.41126 will give you the basics of what the motor is. You can then look elsewhere for something comparable. looks like a 36mm x 50mm inrunner. Anyidea what the rpm you are running now is?

Look on OSE here for motors. Couple at HK that are available:
http://www.hobbyking.com/hobbyking/s...idProduct=7195
http://www.hobbyking.com/hobbyking/s...idProduct=7194
http://www.hobbyking.com/hobbyking/s...idProduct=6530 its lower kv, but you need to see how fast you want to run

Keep up the good work, need to down load my eagle tree and see if my 40" scarab did any better today. Had 30-40mph winds I was fighting, so I doubt it but still had to run it.

Brian


Brian

[ScarabChris]

Hey Brian, sorry buddy you are correct on all counts. No snow shovel, Scarab docked out back and a quick ride out to open water.

The downside....I am embarrassed to say how much my house insurance is. How does $5500.00 a year for a 1500 square foot house sound? It gets worse, how about another $5000.00 a year for property tax. Yeah ouch! The time I spend on the real Scarab keeps me sane.

Brian, please look at my other thread here and give me your ideas. I'm chomping at the bit now. I am building some EP1 lower units that will have the gears in an oil bath. http://forums.offshoreelectrics.com/...ad.php?t=19114

[ScarabChris]

I got all my stuff to upgrade to brushless today. I just got started changing everything over. I'm taking pictures along the way and will post them.

The Feigao 540S is a perfect fit on the EP1s even with the water jacket. Infact its a better fit than the stock 550s.

[Make-a-Wake]

I got all my stuff to upgrade to brushless today. I just got started changing everything over. I'm taking pictures along the way and will post them.

The Feigao 540S is a perfect fit on the EP1s even with the water jacket. Infact its a better fit than the stock 550s.

Yep.............you have 7mm more room at the top now.............you wont have to crunch your stiff motor wires down under the cowl. Outta be nice.

[ScarabChris]

Yes! The cowlings fit much better now. And because these water jackets cover almost the entire motor can I will assume no air cooling is needed. So I am going to seal up those vents on the cowling to prevent water from getting in. That should keep the water out, I don't want to damage those nice motors, especially since I will be running this boat in salt water 99% of the time.

Need to rig a flushing system so the salt doesn't eat away at those pretty purple motos under the cooling jacket.

[Make-a-Wake]

OOOOOooooooooh......saltwater........ not friendly to RC boats. You need to flush it after every time out...........and well. The saltwater will want to hang around in the cooling jacket gasket areas too........... you may want to pull them off completely after a run.

[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.

[Make-a-Wake]

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

[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.

[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.

[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!

[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.