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

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

Post by recumpence » Jan 06, 2018 8:00 pm

Hey Guys,

As the title suggests, I am beginning my latest build that I am calling the "Monster Board".

This will be a huge skate board. It will be over 4 feet long and 28 inches wide. The wheels are 13 inch kids ATV tires. It will be four wheel drive using two Astro Flight 3210 motors (one per axle). It will be live axle (no differentials). For a street board, solid axles do not work well. But, for an off road application, they work great! The board will have full suspension with 4 to 5 inches of tavel and 8 inches of ground clearance. It will have a total system power potential of nearly 10,000 watts! It will be geared for 15 to 20mph depending on how well it runs at verious speeds. This means it will have crazy torque! The pack will be 6S, 40ah Multistar Lipo running through two Castle Creations ESCs. The axle assemblies (trucks) will consist of go-kart axles, hubs, sprockets, etc. I am building this as a true all terrain board capable of going pretty much anywhere, including snow. Odds are it will not be running this winter. But, I really want it for next year. I plan on being able to tow my son around behind it..... :mrgreen:

Make no mistake, it will be a BRUTE! I expect it to weigh upwards of 75 to 80 pounds. It will be, essentially, a 4X4 go-kart slightly shrunk down that you stand on a lean to steer.

For those of you familiar with my E-bike drive systems, this board will use two of my DaVinci Drives. The motors will run up at 10,000 RPM spinning a toothed belt to a jackshaft, then a #35 kart chain from the jackshaft to the axle. The front and rear axle assemblies will be identical running their own independant drive system.

This is a project I have been thinking about for a few years now and I am finally pulling the trigger on it.

So far I have the following parts in hand;

Wheels
Heim joints for the suspension
Air shocks
wheel hubs
DaVinci Drives and system parts
misc aluminum and steel for the suspension and chassis

I have the following items on order for it;

Axles
motors
ESCs
misc materials

I am guessing it will take around 6 months to get it running. So, be prepared for a long wait. I have a couple huge OEM projects for clients that are taking up most of my spare time. But, I really want this thing running! This is one of the very few projects my wife has shown an interest in. :D

I will post pictures as I have them.

Matt
1% of the world's population can think "Outside the box". The rest are firmly stuck within the box. Where are you?

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

Post by recumpence » Jan 10, 2018 5:23 pm

Here are a few pictures.

The tires are 13 inch diameter. I am using standard go kart hubs. I drilled the rims to the hole pattern for these hubs.

The suspension will consist of custom double wishbones using 3/8 heim joints and mountain bike air shocks.

This build will probably take 6 to 8 months because I have two large OEM projects taking up most of my spare time.

Matt
Attachments
IMG_20180110_31606.jpg
Wheel
IMG_20180110_31606.jpg (41.69 KiB) Viewed 114 times
IMG_20180110_1042.jpg
Hub
IMG_20180110_1042.jpg (35.66 KiB) Viewed 114 times
IMG_20180110_52428.jpg
Hub on wheel
IMG_20180110_52428.jpg (39.04 KiB) Viewed 114 times
IMG_20180110_41425.jpg
Wheel on axle
IMG_20180110_41425.jpg (43.95 KiB) Viewed 114 times
IMG_20180110_6640.jpg
Suspension parts
IMG_20180110_6640.jpg (41.96 KiB) Viewed 114 times
1% of the world's population can think "Outside the box". The rest are firmly stuck within the box. Where are you?

User avatar
recumpence
100 GW
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Posts: 5317
Joined: Apr 19, 2008 8:33 am
Location: On Earth right now. That can change at any time, though..........

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

Post by recumpence » Jan 10, 2018 10:02 pm

In the pictures you can see I am holding a solid 1 inch axle. That is a standard go kart axle. This board needs two of them. Those things are freaking HEAVY! I am guessing they are over 10 pounds EACH! So, I ordered some hollow one inch 6061-T6 aluminum tube to make my own axles. That should shave at least 15 pounds off the weight of the board.......

Matt
1% of the world's population can think "Outside the box". The rest are firmly stuck within the box. Where are you?

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Sean9002
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Re: "Monster Board" High power 4X4 board with ATV tires

Post by Sean9002 » Jan 16, 2018 10:57 pm

Sub'd....this is gona be good :D
OSET 20+ - Custom frame and swingarm, Motorims - 66V
Ruff Cycles Porucho - MXUS 3000w - whitewalls - Gloss black/Pearl blue/copper leaf - custom tanks - bobber saddle
Giant Glory 00 - Clyte X5404 - Hubsinks - 18FET Sinewave
Fuji Nevada S - MXUS 35mm- Hubsinks - 12FET Sinewave

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