pic: Chassis Idea

[Rion Atkinson]

Originally Posted by AdamHeard

I'd be very weary of the weight you posted for a couple of reasons; You don't have everything modeled (chain, etc..), and even for what you have modeled, 30 lbs seems really light.

1/8" wall 1x1 is around .5 lbs a foot, and based on your 27x37, that puts you at around 17-18 lbs just for the 1x1. Add in two CIMs at 2.75 lbs each and the Gearboxes at 3.5 each and you see it starting to add up; this isn't even counting your mounting plates or wheels.

I'm not criticizing your design, it looks like a decent start to a decent drive. I just want people to realize that the weight a CAD program is the weight exactly as the model is modeled; So, if the model isn't accurate to real life in terms of included properties, applied materials, and custom mass properties (Setting the weight of parts like CIMs), the number won't be accurate either.

For the drive itself, I'd recommend you switch to a good deal of 1/16" wall, switch to dead axles and prioritize a light & robust tensioning system.

I myself have been questioning the weight. I don't know exactly how much it will weigh. And honestly. There is no easy way to find out. (Without building it) The main thing that has me questioning is that is says this weighs 43.54 pounds...

The reason I went with live axles is simply because I have designed a live axle wheel. I will be making a dead axle of the same wheel and making a dead axle version of this.

Thank you for the notes. I will be taking all of them into account as I go over this design again, and again, and again.

-Rion