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"Monster Board" High power 4X4 board with ATV tires

Lightweight / Folding / Portable EVs - seats optional
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recumpence
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Re: "Monster Board" High power 4X4 board with ATV tires

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Post by recumpence » Sep 21, 2018 1:57 pm

Honestly, the reason I began this build was for snow riding. It has morphed into a full-on ATV board (ATB?).

Anyway, it should run a bit over 20mph with insane torque. I plan on riding it around 10 mph in grades and modest trails, though.

Oh, I want to try climbing a flight of stairs with it. That would make an awesome video!

Matt
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Re: "Monster Board" High power 4X4 board with ATV tires

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Post by kdog » Sep 22, 2018 5:06 am

You are insanely talented and dedicated! Gotta see this thing in action. My mtn board was one of the funnest things I ever owned... This will be 100xthat!!!
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Re: "Monster Board" High power 4X4 board with ATV tires

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Post by recumpence » Sep 22, 2018 3:24 pm

Steering dampers installed.
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Re: "Monster Board" High power 4X4 board with ATV tires

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Post by recumpence » Sep 22, 2018 3:26 pm

A picture next to my car for scale.
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Re: "Monster Board" High power 4X4 board with ATV tires

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Post by ArgusMcJohnsten » Sep 23, 2018 4:24 pm

First, your board is amazing! Second, I've got a bike/scooter project coming up that is going to need jack shaft for gear reduction, and I am still in the learning phase, so please forgive me; Why do a belt for the primary and chain for the secondary?
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Re: "Monster Board" High power 4X4 board with ATV tires

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Post by kerim » Sep 23, 2018 5:19 pm

Haha, that board looks insane! Great job!
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Re: "Monster Board" High power 4X4 board with ATV tires

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Post by recumpence » Sep 23, 2018 6:24 pm

ArgusMcJohnsten wrote: ↑
Sep 23, 2018 4:24 pm
 First, your board is amazing! Second, I've got a bike/scooter project coming up that is going to need jack shaft for gear reduction, and I am still in the learning phase, so please forgive me; Why do a belt for the primary and chain for the secondary?
Different system for different application. A belt is good for high RPM low torque while a chain is good for low RPM high torque.

The first stage runs high RPM with little torque. The second stage runs 5 times slower with 5 times higher torque.
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Re: "Monster Board" High power 4X4 board with ATV tires

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Post by kdog » Sep 26, 2018 8:58 am

It's huge! Bolt a chair to it and a leaning wheel ha!
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Re: "Monster Board" High power 4X4 board with ATV tires

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Post by fechter » Sep 26, 2018 9:29 am

kdog wrote: ↑
Sep 26, 2018 8:58 am
 It's huge! Bolt a chair to it and a leaning wheel ha!
+1. It would make a great go kart. Can't wait for the video.
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Re: "Monster Board" High power 4X4 board with ATV tires

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Post by recumpence » Sep 26, 2018 7:14 pm

It lives!

This thing is a freaking BEAST!

If I run it by itself (without standing on it), it will throw grass from all four wheels like a nitro RC car!

I set the throttle end point at 50% to ride it.

Everything is great except it needs centering springs for the trucks (it weaves too much). It is ride-able, but squirrely. So, I ordered some springs from McMaster.

Other than that, I just need to do some final wiring.

Oh, the motors and controllers run nice and cool.

Matt
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Re: "Monster Board" High power 4X4 board with ATV tires

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Post by recumpence » Sep 27, 2018 9:02 am

A quick picture of the component layout.
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Re: "Monster Board" High power 4X4 board with ATV tires

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Post by Silenthunter » Sep 28, 2018 11:44 pm

Matt, great job man! We need to see you kill some trails now...and maybe some 40 degrees incline...coming down the stairs...

As always FANTASTIC job Matt!
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Re: "Monster Board" High power 4X4 board with ATV tires

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Post by recumpence » Sep 29, 2018 3:00 pm

I finished the wire harness and I am installing the truck centering springs right now.
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Re: "Monster Board" High power 4X4 board with ATV tires

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Post by Silenthunter » Sep 29, 2018 7:52 pm

Awesome!!! Video in action please...
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Re: "Monster Board" High power 4X4 board with ATV tires

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Post by recumpence » Oct 02, 2018 7:19 pm

I've been riding the board ALOT. It runs fantastic! I have been fine tuning the steering spring tension, steering damper settings, steering kingpin angle, controller settings, etc. I have about 3 hours of riding so far and I am nearing nirvana on the setup.

I am shooting a video of it tomorrow.

Matt
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Re: "Monster Board" High power 4X4 board with ATV tires

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Post by Rube » Oct 03, 2018 5:43 am

Congrats Recumpence, you build some wild ideas and this is so unique :D I've been following with interest, thanks.
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Re: "Monster Board" High power 4X4 board with ATV tires

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Post by recumpence » Oct 03, 2018 10:56 am

I spent the morning debugging small items on the board (loctiting screws, adjusting rear steering, finalizing steering centering springs, etc) as well as shooting video footage.

I will upload a video today. :D

Matt
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Re: "Monster Board" High power 4X4 board with ATV tires

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Post by recumpence » Oct 03, 2018 11:03 am

Thumbnail for the video. :mrgreen:

Matt
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Re: "Monster Board" High power 4X4 board with ATV tires

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Post by recumpence » Oct 03, 2018 11:11 am

Another pic.....
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Re: "Monster Board" High power 4X4 board with ATV tires

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Post by recumpence » Oct 03, 2018 5:33 pm

https://youtu.be/VxVajK8fMw0

Enjoy!

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Re: "Monster Board" High power 4X4 board with ATV tires

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Post by SlowCo » Oct 03, 2018 5:47 pm

Great and informative video! Thanks for making that, I enjoyed it indeed.
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Re: "Monster Board" High power 4X4 board with ATV tires

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Post by macribs » Oct 04, 2018 2:36 am

recumpence wrote: ↑
Oct 03, 2018 11:03 am
 Thumbnail for the video. :mrgreen:

Image

Matt

Wow I had no idea the actual size of that board. In my mind I pictured it kinda big but that is surf board big.
Oh well does it float and carve like a snowboard? That thing must be a riot to ride.

Congrats Matt, once again you have taken an idea to the absolute max. I don't like it, I love it :D

Btw, are you familiar with the Baja Board? I wonder how your board does carving on soft sand like on the beach compared to baja board. There are videos of the baja board on the tube if don't know about it. It is also 4 x 4, one motor or each wheel, each wheel independent axle and double wish bone and a shock in each corner. With your reduction gear I bet you can climb as steep as the baja board.
Last edited by macribs on Oct 04, 2018 11:11 am, edited 1 time in total.
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Re: "Monster Board" High power 4X4 board with ATV tires

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Post by fechter » Oct 04, 2018 9:31 am

That looks great! It has a surprisingly tight turning radius.
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Re: "Monster Board" High power 4X4 board with ATV tires

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Post by recumpence » Oct 04, 2018 10:45 am

I know. I was surprised about that too. I can do circles in the middle of the street in front of my house. Plenty of steering available.
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Re: "Monster Board" High power 4X4 board with ATV tires

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Post by macribs » Oct 04, 2018 11:12 am

The length of the board should make it stable as rails on higher speed?
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