BMoto Desktop Surfer - with Radio Control??

[Balduccimoto]

I got some parts in, but I had a bit of an accident on the work bench that ended up with a bent impeller shaft and motor shaft.. All the components are mounted though and it should have a total weight under 500 grams. Im not too sure how that compares with other RC models but as far as I know there isn't any other RC boat this small with a brushless motor.

I am a bit optimistic of the motor carnage: I ordered a bigger motor 2040SL.

 

[txsuperjetfreak96]

Sweet been wondering what size motor you would b able to fit in

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[Balduccimoto]

Sweet been wondering what size motor you would b able to fit in

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I originally bought the 2030 motor to put in, but as things evolved, there was more room than I anticipated. It's possible to go even larger, but it would require moving the motor forward which puts all the weight to the front of the boat. Right now it is an exact center center of mass with the motor bolted directly to the firewall. Even with the 20mm can there is very little room to fit the pushrod seal and gunwhale batteries. When the hood is removed it looks like a bundle of wires, but everything becomes easily accessible by removing the o-ring sealed top deck. I am very excited to finally test this thing. I am optimistic that it will be a very light boat that is safe for pool play, great for tricks, and self rights when flipped over. The only issue I can foresee is the heat generated by the ESC and motor, but I modeled a hoseless design that is integrated into the stator section.

 

[Balduccimoto]

 

[MADMAT]

I got some parts in, but I had a bit of an accident on the work bench that ended up with a bent impeller shaft and motor shaft..

I am a bit optimistic of the motor carnage: I ordered a bigger motor 2040SL.

Micro carnage!! More powa!!

 

[Roseand]

Does it have trim so you can flip it?? Haha

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[Balduccimoto]

Does it have trim so you can flip it?? Haha

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The pump tunnel is so tiny that I can't fit it. The transmitter/reciever is a 3 channel so there is room for another servo. Then again: I keep saying "can't be done" and then I find a way. We'll see what happens when I get the new motor with the cooling sleeve. I have been adding to the bottom deck for other features and I really don't want to add anymore, but I might have to if the ESC/motor requires cooling.

 

[Roseand]

Have you thought more about what kinda price you're hoping to sell these for?

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[Balduccimoto]

Have you thought more about what kinda price you're hoping to sell these for?

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Way too early to make any prices. It is surprising how much it costs for me to just make one and I have to source components from 5 different suppliers to try and reduce those costs. Depending on what kind of deals I can make, expect anywhere from $200 to $300 with battery, charger, and remote. I have seen RC boats sell for anywhere from $50 to $300 depending on features like brushless motors, lipoly batteries etc. All of which this boat has. I will be offering a bare bones version that includes everything but the charger and transmitter since people may want to use their own. I really wish I had been more aggressive on cyber monday - the charger I was getting for $35/piece was on sale for $4 and sold out in less than an hour.

 

[Balduccimoto]

I got a motor with water cooling and I made alot more changes.. Probably won't be able to print the latest prototype until Christmas. Im in the christmas "maker" mode, filling orders, and studying for finals at college. So things are a little

Christmas "can you make an artist's easel?" she said. The one she had in mind was very simple.. I have something else in mind.

and then there is the RC jet ski.. with my "nightmare before christmas" coffee mug. How very ironic..

and then I have a drone to assemble.. Thanks to the video that was uploaded the forum with the 3DR drone..

 

[txsuperjetfreak96]

It's gonna be so bad ass when your done

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[SkiNick]

Subscribing!!

 

[Balduccimoto]

The project will be resumed on Christmas day. I should finally have some printer time back. It has been preoccupied by a dozen model jet skis, an artist's easel, and a multitude of drone parts. I will also have the opportunity to show off some new colors I had ordered.

 

[madd_dips]

The project will be resumed on Christmas day. I should finally have some printer time back. It has been preoccupied by a dozen model jet skis, an artist's easel, and a multitude of drone parts. I will also have the opportunity to show off some new colors I had ordered.

Drone parts. Due tell....

 

[Balduccimoto]

Drone parts. Due tell....

I think my brother was inspired by the RC stuff that I was making and he decided to get a drone. He bought all the components individually and I know that he spent alot of money to have a very nice one. I turned him on to the 3DR drones and he did his research. It turns out that 3DR is open source and he was able to get their Pixhawk and GPS module. As for the transmitter he got the Flysky T6 with some fancy carrying case. The frame I think is an Aerosky. I have been practicing with the controls using some flight simulator and it isn't that easy to fly. Racing through obstacles are more difficult that I had thought. The 3D printer has been making various bits that we thought were necessary for the drone.

 

[Balduccimoto]

Finally got around to testing it in the bathtub. There is so much water pressure in comparison to other RC boats. This thing is going to absolutely rip. I have only tested it with no top deck while holding the electronics and boat from moving. There was a alot of torque behind this little boat. Hopefully later tonight or tomorrow I will get a video.

 

[Jetfiend]

So what your saying is, a back flip might be possible?

 

[txsuperjetfreak96]

Gnarly

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[Balduccimoto]

So what your saying is, a back flip might be possible?

It's a possibility. The driveline should be spot on as it sits. I have cooling to the motor so in the next few days i'll hook up the cooling lines and do a burn test to see if the ESC gets hot.. Then I will have to figure out what to do with that. I also have to test the servo under load and make sure that little servo can turn the nozzle while under pressure. I have a larger servo, but it may get a little tight in there. Maybe I will explore the idea of using a gear and a toothed rod to increase the torque and convert to linear motion.

 

[Balduccimoto]

The reciever got wet and died before I could take some video. I got to playing around a little bit and it works remarkably good. Top deck was bolted on and I half-assed a block off for the steering tube and cooling line for testing. The biggest problem is flotation.. It floats with the bond line about 1cm below the water. It weighs 510g and ideally it would float such that the bond line is just above the water .. A displacement of 305cm^3 via CAD's calculations. Since I know the volume of the desired water line, that stays constant so then I would have it such that the mass of the boat gives a density equivalent to the density of water.. 0.305kg or approximately 0.7lbs .. Im not sure where I could even take that much off. I would probably have to widen the bottom deck so it can displace more volume, I just dont see where I can shave off 200g.