Proboat release new Blackjack 42" catamaran

[fweasel]

In case you hadn't seen these yet...

Polycarbonate Hull: Two-piece shoe box construction for extreme hull durability. Molded composite material is much more impact resistant than fiberglass.
Polycarbonate Canopy: Durable 2.5mm polycarbonate provides a watertight seal and the thumb screws means no tape is necessary to retain hull on to hull.
Spektrum Marine 4685 4 Pole, Water Cooled Motor: Rated at over 5 horsepower with 85%+ efficiency, this powerful 8S capable brushless and waterproof motor provides more than enough torque to hit 55+ MPH.
Spektrum Smart 160A High Voltage, Water Cooled ESC: Able to handle all the power needed, it is programmable, water cooled, waterproof, and Smart.
Aluminum Propeller Strut and Rudder: Both the propeller and rudder feature anodized aluminum. The runner has a special break away feature that protects the hull from damage in case floating debris is struck.
S904 1/6 Scale WP Digital Servo: The high torque digital servo provides all the necessary power. Waterproofing makes sure the servo is up to the task of being in a boat without the risk of failure do to getting wet.
Boat Stand: This custom molded plastic stand fits perfectly to the contour of the hull providing a rock stable platform to display or work on your boat. This boat stand will last for the life of your boat without the need to worry about water rotting a wooden stand.

bj42 teaser.jpg bj42.jpg bj42red.jpg bj42interior.jpg

[1coopgt]

Looks interesting. I'm tempted

[hughb]

Interested to hear peoples thoughts on the polycarbonate hull, a different way to go.

[fweasel]

Interested to hear peoples thoughts on the polycarbonate hull, a different way to go.

Will likely be fewer warranty claims than with fiberglass

[1coopgt]

Totally agree. Unfortunately if you hit something hard enough to crack it there's no real good way of fixing it unfortunately. Wonder how thick they are making the hull. Poly carbonate is some really tough stuff though.

[hughb]

Arhh I see. Though would it be likely to flex more when driving it, changing the geometry of the boat?

[fweasel]

Arhh I see. Though would it be likely to flex more when driving it, changing the geometry of the boat?

We'll find out when people start receiving the boat, but I bet flex will be a non issue.

[MADRCER]

If time allows and if the weather cooperates I should have some running videos uploaded on YouTube by the end of the week for those interested. Horizon gave me the go-ahead to move forward and start rolling them out.

https://www.youtube.com/channel/UC-i...IWjxcmut9446Dw

[1coopgt]

Very Cool . Curious to see what props will work good on it too.

[naveda_08]

Wonder if she'll be faster than my 8s SonicWake, cant wait to see her with some decent props on MADRCER channel

[MADRCER]

Good looking boat! 3/16 prop shaft that will take the famous dasboata props is always a plus... SSS 3674 motor for comparison as well.

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[1coopgt]

How does the hull feel compared to the fiberglass hull of the Geico, flex or stronger.

[MADRCER]

How does the hull feel compared to the fiberglass hull of the Geico, flex or stronger.

Definitely more flex than Fiberglass.

[oscarel]

How do you get away with no space between strut and drive dog?

[MADRCER]

How do you get away with no space between strut and drive dog?

You talking about my Geico 36 in the video? It as 5mm gap in it. The Black jack has about 2mm out of the box.

[oscarel]

The new from the box.. This doesn't look like nearly enough gap.

Sent from my SM-G986U1 using Tapatalk

[MADRCER]

The new from the box.. This doesn't look like nearly enough gap.

Sent from my SM-G986U1 using Tapatalk

I like about twice that much myself (4-5mm). That was about 2mm right there out of the box though.

[1coopgt]

Easy enough to correct. I know I usually go through a new boat setting it up before taking it out on its first run.

[dasboata]

My bet is the stuffing box is going to break the shaft on the braze that angle is a bit to much

[MADRCER]

[1coopgt]

It will be interesting to see how it does as you start tuning on it. Looks like the prop needs to be aimed down slightly to keep it from blowing over.

[MADRCER]

BJ 42 flex cable (1/4 inch size) beside a .187 cable.

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[MADRCER]

Temp checks and trying to keep it on the water.

[ACKopter]

Hello all, This is my first post here and having just pre-ordered the Blackjack 42 it would seem to be the best place to ask a few questions.
Never having a boat before the speeds this one can deliver might be a bit much for a newb such as myself. My idea would be to run the boat on 6s for awhile till i get more familiar with the boat and its handling, tuning, etc. Some concerns are what effects this will have on the power system itself running 6s instead of 8s, will it run hot or cooler and will i need a prop change to accomplish this? Secondly, could someone tell me what the ID is on the cooling lines as the first modification i wish to make is cooling the motor and ESC independently and utilizing both water pick ups in the rudder.
TIA, Chris

[1coopgt]

I wouldn't worry to much. Most RTR's have dual rates built into the transmitter, I think its called so you can slow things down. Someone will correct me if I'm wrong.

[ACKopter]

Thanks, allthough I prefer actual user input I'll reach out to horizon as well.

[MADRCER]

Thanks, allthough I prefer actual user input I'll reach out to horizon as well.

The BJ 42 DX3 controller has a throttle limit switch on top of it with 3 settings that can be changed. It's got a 50%, 75%, and a 100% setting. On the 75% setting the boat runs stable as can be in the low to mid 40's mph range and on 100% it turns into a powerful Beast. Below is a photo of the transmitter and you can see the switch.

Also I guess I can go ahead and post my latest video over here as well.

thumbnail (1).jpg 58mph bj 42.jpg thumbnail.jpg

[ACKopter]

The BJ 42 DX3 controller has a throttle limit switch on top of it with 3 settings that can be changed. It's got a 50%, 75%, and a 100% setting. On the 75% setting the boat runs stable as can be in the low to mid 40's mph range and on 100% it turns into a powerful Beast. Below is a photo of the transmitter and you can see the switch.

Perfect, just what I needed to know. Any chance you could tell me the tubing ID for the cooling system? Id like to separate the esc and motor on their own cooling loops or do you think that is overkill.
Nice video too!

[MADRCER]

Perfect, just what I needed to know. Any chance you could tell me the tubing ID for the cooling system? Id like to separate the esc and motor on their own cooling loops or do you think that is overkill.
Nice video too!

The cooling tube is 6mm outside and 1/8 inside. More cooling can't hurt but the stock system doesn't overheat at all, not even close to overheating. I would use this tube here https://www.offshoreelectrics.com/pr...ng-1%2F4-clear

[ACKopter]

Excellent, thanks for the info. FYI, I reached out to Horizon about running on 6s and they do not endorse it, kind of expected that. Not that it matters at this point as your suggestion on throttle limiting seems like it will suit me just fine.