ProBoat BlackJack Twin Build

[mtbenjamin77]

I picked up this RTR package at the hobbyshop the day they were released. It never touched the water before being gutted for twins. Here's some pics.
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The cardboard cut outs are my templates for carbon fiber pieces
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Here i've cut out the exsting stuffing box
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[srislash]

Oh,you are a brave sucker.I just finished the Geico and it is tight in the back there.Got your patience pills handy?Motor bolts were the issue.

But don't get me wrong, I LIKE IT

[mtbenjamin77]

The stingers will be made of carbon fiber tubing with brass lining and a brass strut bushing.
Here i've lined the sidewalls and transom with Carbon/kevlar cloth.
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[mtbenjamin77]

yeah I had the same problem with a delta cat I built recently. I made a special tool to get the motor screws started then just had to tighten them with a regular allen wrench

[srislash]

yeah I had the same problem with a delta cat I built recently. I made a special tool to get the motor screws started then just had to tighten them with a regular allen wrench

A piece of silicone tubing on either a 1/4 drive allen key(screwdriver type) or even on the bolt itself works.Give you a little something better to grip with your fingertips. Of course I didn't think of that till final assembly

[mtbenjamin77]

This shows how the motor mounts will sit and be glass in place. The cardboard patterns were traced to some scrap plywood so I can mount the motors and get a good feel for were they will be positioned in the hull. I had to adjust the mounting holes so that the motor shaft would line up with the stingers. I also want the motors to sit as low as possible in the hull. the motors I used are just for mockup so I made sure my mounting holes were drilled so I have some leeway on what size motor I can use. I left plenty of room to fit a pair of 40 series if need be.
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[mtbenjamin77]

I just finished laying up the CF inlay. I ran it up as far as possible under the front deck. I have one last layup to do and I'll be ready for hardware installation.

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[mtbenjamin77]

These hulls have a tendency to split along the seams in the front. The sides have the inlay but the center bow at the tunnel only has the factory seam.. So what I do is take some left over cf fabric and chop it into very small fibers. Then I mix up some 30min epoxy and mix the fiber in creating an epoxy/carbonfiber kitty hair type resin/paste. Then simply apply it generously right at the front seam at the tunnel.
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[mtbenjamin77]

A piece of silicone tubing on either a 1/4 drive allen key(screwdriver type) or even on the bolt itself works.Give you a little something better to grip with your fingertips. Of course I didn't think of that till final assembly

Here's mine.............
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[Rocstar]

Very Cool!

[Jersey Crewmax]

Looks good, looking forward to seeing the end product.

[Brushless55]

I dig these small twins!
Looks cool man..
I would love to try twin 3674 2650kv motors in my MM

[mtbenjamin77]

I dig these small twins!
Looks cool man..
I would love to try twin 3674 2650kv motors in my MM

I think I'm leaning towards 3674 1700kv on 6S, But it designed to fit up to 4074's.

[srislash]

I also put a stringer down the center under the deck.This will eliminate the deck pushing in and cracking the side seams in a blowover.

Just sayin'. Blowover will be inevitable with 40mm motors.

[Brushless55]

I think I'm leaning towards 3674 1700kv on 6S, But it designed to fit up to 4074's.

you would have plenty of power to run as fast as you like