housing and will allow you to choose between various reduction ratios :) And the best of all is you can use it also as simple center diff. So I designed a new Gearbox which can be mounted in the same place as the simple center diff. my engine got really hot very quick, that's when I realised I needed to "gear up" the thing. I bought 128mm diameter wheels and had the motors from my previous "speedy" OBTS builds.
This can be enough if you don't have big wheels and have the right engine + ESC. This is how I started doing my first tests with this chassis. This chassis can use the same Center Differential Housing than OBTS one, mounted over the central platform. Obviously you could also build the inverse hybrid but I think it is not common. The fun thing is that, as they share the main part of the chassis and center differential, you can also build an Hybrid! I mean a car with front independent suspension system and a Rigid Axle in the rear. I designed what I call a "Double Cardan Variable Length Transmission" as this part is not as easy to source as the others. But this kind of chassis needs a special kind of central transmission. Trying to use the same sourced parts than in the other version of MTC or OBTS chassis I designed a compatible system for Rigid Axles of various widths and a multilink suspension system for them which should allow the use of different wheelbases too.
Rigid Axles Version: The RC crawling world is really big and I was not covering their needs with this chassis and it was one of my goals. As I had this parts designed I centred my efforts in designing a chassis which could use them but the same time "let those doors opened" to be able to design and use other parts to make the chassis more versatile. I wanted you to be able to dis-assemble your OBTS chassis and be able to build another kind of chassis with the same sourced parts and a few new printed parts. Independent Suspension System Version: This version is the first one, and I re-used many already designed parts from OBTS chassis, as the F/R differential housings or the center differential housing. The most important option is the kind of axles you want to use. The MTC chassis design started having just a few options but ended with some more. The shape of the chassis tries to be narrow to fit where an Axial SCX10 would fit. The main measures for the chassis are similar to the ones of an Axial SCX10 and allow you to build a model with a wheelbase from 270 to 330 mm. Instead of one big lower plate as in the OBTS chassis, this one is made of "bars" and "platforms". Remember to subscribe to my Youtube Channel if you want to watch my latest videos! MTC Chassis with FJ Cruiser Body having fun more than crawling MTC Chassis with Typical Pickup Body in high-lift mode MyRCCar MTC Chassis with the Typical Pickup Body and 1:3 gearbox reduction Speed Build Test Drive of the MTC Chassis There are a few successful makes of this chassis now and I also had the chance to test it, improve it and film it! Please, take a look to some of the next videos to know more about this chassis, mostly in the Independent Suspension Version. That's why my "designing style" for this chassis was something like "let some doors open" to continue the work in other directions after taking some key design decisions in some points. I had all the ideas finally made real in my mind from the beginning, but I could not face their design challenges all together. The way I designed this chassis can be observed in the evolution of my publications in thingiverse. Also all the parts are a little over-sized to be as strong as possible, but maybe this makes the car a little heavy too. This will make the car to roll over if you turn close at high speeds. The main goal this time is to have a great clearance, so the center of gravity is also higher. That's why the MTC chassis started to appear in my mind. After finishing with the OBTS chassis I knew I was not covering all RC car types with that one.
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