R/C Tech Forums - View Single Post - [Project] Custom Reverse Chassis Mid-motor Bandit
Old 08-01-2018 | 10:53 AM
  #1  
BrickitSAM
Tech Apprentice
 
Joined: Nov 2017
Posts: 56
Default [Project] Custom Reverse Chassis Mid-motor Bandit

Hello,
First a little backstory... Ever since I have gotten my bandit, I had wanted to do the midmotor mod and have a better chassis with a more forward SoG. I researched tons of threads and almost all of them were either kits that were expensive (I'm on a budget here) and had to run a shorty battery. Since I already have non-shorty batteries that I am happy with and don't have anything else to use them with, I decided to try to make mine the first I have seen to keep the original wheelbase, have mid-motor, and run full sized packs.
I started by taking my Bandit apart to get to the chassis, once I got there I studied it and realized that it would be impossible to keep the original geometry keeping the original chassis, so I thought. I put the chassis down and took a break, later I went back into the shop, the way I had put the chassis down was backwards, then I realized that the chassis almost looked exactly the same as high-end buggies and truggies. I started doing some math then drilling holes for the rear gearbox, I found that with light filing and some small hand saw cuts, it fit perfectly with even the right anti-squat (No RPM gearbox needed!).
I moved on to the front, found out the ESC plate screw pattern is the same as a servos, than began prototyping a steering linkage, I found out that with the original steering linkage there was no possible way to make it work without the servo sticking out hugely. I hit a wall and worked on it for a solid 3 days, I tried over 10 different methods and none of them worked, I originally wanted reverse-bellcrank but there is no way to do that with the original bulkhead so that was a bust from the start. I started to dig around my parts and found my 2.5 T-Maxx steering linkage, I started to work with that and discovered that if I cut them down and made a vertical bellcrank system, similar to reverse, it worked perfectly, with a few mm to spare. Granted it has a little less steering lock, but for using cobbled up aluminum angle of unknown grade, I think I did OK.

Enough talking-writing, here are the pictures
The final weight is around 3ibs, there is plenty of weight to take off of the transmission case, front chassis brace, and chassis. I am thinking of buying a carbon front tower, and making my own rear tower out of aluminum or plastic to lower the shock profile because they are way too long (SCT shocks) I also need a wing mount, I was thinking an 8ight 4.0 wing and mount because I hate the stock one.
I will make a follow up post of the build pictures, and diagrams of how to make it.
Does anyone have any suggestions for a body? don't care which brand since this is going to be a mashup. I also plan on making a custom body for it, any suggestions on body styles?

Last edited by BrickitSAM; 08-03-2018 at 05:22 AM.
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