Developing a New Truck, The Other Planet M1.


So here it is.

There’s a few things to get into about what and why.
Firstly, these are a progression of the old Other Planet P2 trucks that I helped to make with Other Planet back in the day, 2008-2012 or so.

Truck2cropped

The company went bye-bye several years ago, and now the patents are expired. So I’ve spent the last two and a half years adapting them for Mountainboarding, and hoping the get a version going on esk8.

Other Planet Trucks are unique in a number of ways. But the most stand out feature is the rubber cam, and the raising center of gravity giving these trucks incredible stability even without any resistance.

Animation
You can see how gravity alone provides a natural return to center.

I’ve taken OP trucks without resistance up to 40mph.

Along with that inherent stability also came a tremendous ability to lean. Your ability to lean wasn’t locked in or restricted by bushings, which provided its own unique feel and freedom.

With all your weight resting the cam, it also eliminates the metal on metal contact, and harsh feel that so often comes with channel style trucks. In the gif you can see the center bolt doesn’t come all the way up to the top of the slot, and that’s to account for a couple mms of compression of the cam while riding.

A truck that can ride without resistance is all well and good. But it wasn’t just that they worked really well without resistance, with the P2 it was also that we really couldn’t figure out how to provide robust resistance. Without that option they were really limited, and that was part of their downfall.

Now lets wrap everything back up and focus on the M1’s again.

Resistance is one of the things I’ve been really focusing on.
What I came up with was really heavily inspired by what IMO is the best feeling resistance on any non-traditional truck, the Rojas Trucks, and their bushing solution.

Rojas provide just such an incredibly positive center, without even having any preload. They also have a great progression that allows for a ton of feel. You’re not just putting your energy into something dead, it gives back and has expression.

If you imagine taking those Rojas bushings, and sort of cutting them in half to get two sets of figure 8’s,


That’s exactly what I’m using for my Trucks. The range of motion is greater, so the bands are a little thinner than Rojas. But I’m telling you now, the feel is superb.
image

The bands are 3D printed Polyurethane, and in the 2 years I’ve been using them I’ve yet to have one break. But just in case, I’ve built in some redundancy so there’s 2 bands on each side.

The Cams are also 3D printed polyurethane.
Different cams result in different lean progressions, and will engage the resistance bands slightly differently. Over the course of years of experimentation I’ve narrowed it down to two basic cam variants.


We used to call these standard and super-carve cams, but now I feel like its more appropriate to call them front and rear cams. The more curved front cam offers quicker turning response, the flatter rear cam provides a lot more stability. If you want something really responsive you can use two front cams, if you want something super stable, you can use two rear cams.

Durometer and rebound also affect the feel, which is why these are printed from a different and less reboundy material than the resistance bands.

Now lets talk DIY.

One of the incredible things about this truck is that everything here is hand made, or 3D printed.
Just printed templates, drill bits, disk sander, and a propane blowtorch.

The goal, and the concept is hopefully be able to get it out there as a kit for people to make themselves. As nice as it would be to get this truck CNC’d or go out and get molds made, firstly I don’t think the design is developed enough yet. But also I find this approach just really compelling.

Think about the customizations, modifications, and also the reparability that comes from this approach.

First off, the whole hanger is built around standard 3/4" 16 ga square tubing. I made these narrow, only 9".
But I could really easily make them just about whatever.

For the axles I’m just using 3/8" bolts. And the secret sauce to make this so doable is square nuts, and silver solder, to transform the square tubing into a robust hanger.

The limiting factor for strength seems like its going to be the square tubing itself. I’ve not done a lot of testing yet, but so far it seems like the solder joint is the strongest thing here. I think you’ll destroy the threads or bend the tube before you break that joint, unless fatigue changes things over time.

I would like to explore 7/16" axles, I think drilling and tapping the square nuts to the larger size would probably work. But I’m not sure what to expect from the strength of the square tubing yet. So the 3/8 axle size might be more appropriate to the strength of the system. 7/16 might mean finding a way to get 1" tubing to work, or perhaps stainless steel square tubing instead of mild steel.

Currently using 1/8" aluminum angle on the base, mostly because that’s what I have. I’m not sure strong the channel itself its going to need to be. Forces are distributed over so much surface area, and in so many different ways, I’m just not sure yet. But the design should accommodate 3/16" or 1/4" aluminum angle as well.

The last thing is, I just don’t know how much everything is going to wear. One of the flaws of this design is its not able to utilize bearings to take up load anywhere. The entire channel is essentially acting as a giant plain thrust bearing, meaning the entire channel wall and hanger is a wear surface.

Right now the plastic slot plates are made of acrylic, because that’s what I had on hand.
But I’d like to get them made from UHMW.


The slot plates are just press fit onto the hanger with pins, and are reversible. So once one side wears out, you can flip it and use the other. And its simple enough of a component to be able to make replacements by hand if ever I’m not able to provide replacements myself.

The aluminum angles are protected by HDPE shims, which is designed to be the primary wear surface over the UHMW slots.

HDPE is softer than UHMW, and should therefore take up most of the wear. Shims are very easy to make and replace by hand using only scissors. Food grade plastic containers can be used to source your own material, so raw material is readily available.

So yeah, the plan is to sell them as kits that come with all the material and bits you need. It would have the plastic slots already cut out and drilled, it would have adhesive backed templates already printed, it would have tubing, nuts, silver solder, flux, etc, etc. The whole kit idea still has to be developed to make sure that the process and the instructions are something people can deal with. But, I think it should be a lot of fun.

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Damn this some next level shit @CHAINMAILLEKID. Since this is for mtb do angled tips come into play at all? Does it affect the way the trucks return to center?

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Yes. So these are 0 degree channel trucks. They need to be on angled tips unless you think turning is overrated.

Technically it affects the return to center. The more angled it is, the less vertical gain from the raising center of gravity, but it falls in line with the same sort of behavior you see generally with more turnability and less stability.

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This looks like a super fun project!!!

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Short little vid of me making a truck.

Just have a few things to check using the pair I’ve made.
Then I’m going to put a kit together for a buddy, and have him build a pair.

After that I should have enough details pounded out to start getting kits in peoples hands.

Probably looking for ~2-5 people from here who’re interested in paying material cost + shipping to help me iterate a decent set of instructions, and check for any issues that might pop up with the design.

After that, hopefully should be good to go and actually have kits for sale.

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Seems like you got a good system down dude. Nice vid.

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I’m putting together a kit to send to a buddy.

And it just so happens to stack together in the most perfect way imaginable.
Even the hardware, the bits and bobs all fit inside the square tubing.

My plan was originally get this put together and sent to him before new years, but I started working 2 full time jobs, so commiting time to this has been crazy hard. But I am at the point where I’m moving forward with it again.

Been thinking a lot about the role for this whole kit concept, and I think the best place for it is to use the customizability to chase after different peoples needs and dial in on a minimum viable product for truck, and less about developing a kit as a product itself, which would have be really fun.

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That’s really satisfying.

“if Ikea made trucks”

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I literally signed up so i can comment keep track of this development.

I remember seeing Other Planets when i was in middle school but was too poor to buy a set.

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I lost my aluminium extrusions and one of my hangers.

I think a great first step would be to reverse engineer and draw in CAD(3d scan?) the hanger and baseplate 1:1.

I have designed and successful ridden 3d printed other planet trucks both hanger and baseplate 3d printed out of petg and 8mm threaded axle fitted through the printed hanger. but lost the files

Having ridden other planet trucks, this might be the biggest breakthrough to eskating and skating ever and it’s very good news the patent is gone for many reasons…

the other option chainmaillekid is to launch business with trampa or yourself and go knee deep in the development.

the Chinese will eventually steal everything but you could use your YouTube channel to bring people to your store.

I want to be the first to ride other planet e-trucks and would be happy to collaborate on the endeavour.

I find it really cool you make everything yourself.

but I can get anything CNC quick let’s make two 4WD hubmotor urethane boards and see how it gies

I could probably get the original Cad files, but they wouldn’t be much good if you’re not using the aluminum extrusion. Cad needs to be re-done for whatever manufacturing method you’re using anyway. And there’s really no reason to have them as reference either as, well I just know what I’m doing with the design so I can build up from scratch easily enough however I want.

I actually do have customizable 3D printed files for original P2 compatible Hangers up, that’s on Thingiverse.

After the company when under one one of the first projects I started was this, so that people could still replace their worn out hangers.

That ended up developing into fully 3D printed Mountainboard trucks.

Which ended up developing into this project.

3D printing allowed me to figure out how to get resistance working, and play around with the channel strength and the slot in ways we couldn’t do with extrusions.

Once the baseplates were figured out and they stopped changing, it stopped making sense to 3D print them, and so I moved to using Aluminum angle. And that’s been working great.

I’m not looking to go straight to CNC, because ATM I can still iterate faster with these kits. The Need for CNC isn’t far off those, but there’s a couple of important problems I need to, not necessarily solve before doing CNC, but they need to be fully explored.

I can publish all the fusion files or DXF files I’m using for these kits though for anybody who is wanting to take these to CNC.

As for the Chinese stealing this design, or it having value for Trampa, I don’t think that’s a reality for this design. These won’t hold up to wear and tear, its got sacrificial wear components. Its not too much fuss for the DIY community, especially since there’s nothing to stop you making your own consumables.

But for a consumer product? Its not going to meet that standard.

Taking these trucks to that point will be a fundamental redesign, which is its own project.

While that redesign is happening, these trucks can hopefully go out and help establish what the community needs are, and what the design requirements the Eskate community, and the mountainboard community, and wherever else people can find applications for them.

That’s the core idea behind the kit.

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whatever the price is of those original CAD files is I’ll pay.

I need them for strictly personal purposes to get my li
longboard repaired

I have loads of extrusions I can sell you. That will be easier than trying to meet up with the main engineer and convincing him to go through all his old files.

how long until there’s an other planet esk8 truck on urethanes

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I don’t think they have a reputation for building long-lasting products … their primary concern has typically been lowest price point possible (at any longevity cost), then disappearing after money changes hands.

I mean that great wall standing strong after 500 years

Terrible example…
Most of the wall is in ruin and the part that looks good they started rebuilding in the 1950’s.

Yea…yea…I know, nobody cares. :joy:

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1-2 years if we’re just talking how long before I build a setup of my own.

My poor boosted board, battery isn’t what it used to be. I’ve actually got to start working on the early phases on figuring out what I actually want from my own custom Eskate.

But in terms of getting something make that other people can ride? Who knows.

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