Double or Nothin'

[HenryCrawllins]

Seems like I'm on a bit of a kick right now with building rigs two by two. We're just going to say it's for science. I decided to make a revision on one of my chassis designs, and it sort of snowballed into building a second rig, so that I could test them side by side with no need for downtime to tune or swap parts. I figure there's some benefit to running a line back to back, while I'm in the same zone, and while conditions are identical.

Anyway, this is Purple Rain. So far, it's my best performer. It has flaws, however. I've found some perceived drawbacks with the super short front center, and I may have gotten a little lost in the sauce with chasing a low CG. I think it's pulling around too much brass. The core of the truck is a Fusion 1800kv, driving a set of Pro45 axles through an Exo gearbox. Right now it's sitting at a 330mm wheelbase. It has 27% OD, and 60/40 weight bias.

And this is the new hotness. No name yet, and it's still probably a couple weeks away from hitting the rocks. All the parts are here as of yesterday. Early estimate puts it at 500g lighter. Going to try my luck with the mini Fusion. Same gearbox, but Capra Axles (Dlux built), so this will be a good comparison of high scrub vs low scrub, as I've matched the track width of the Pro45s with more positive offset on the wheels. Same OD, but with 67/33 weight bias. I have plenty of weights I can add if I want to match the corner weighting between the rigs.

I still need to swap out the shock caps, and add a small spacer to the rears. Hopefully that'll be done this afternoon.

 

[HenryCrawllins]

Got everything buttoned up, pending a shakedown. Already thinking I might need softer inserts, but I'll test these ones out a bit to see if they settle in at all. I also went over my goal of sub 5lbs, just barely. I'll go back through it and figure out where I can cut some weight.

Some shots of it with its older brother, since it's only gonna look this pretty once.

There's also a little teaser of another potential summer project in there, which is digging out that hillside in the yard to see what kind of test course I can build.

 

[Gula]

Those look SO SICK !!!!! now i needs one too.

 

[HenryCrawllins]

Those look SO SICK !!!!! now i needs one too.

I'm always happy to share the CAD files for my chassis, if you have an affordable spot to get them made. If there's enough interest. I could even do a larger order from SCS, and get that volume discount. I'd still want to do a good bit more testing on this latest build though. This is my third revision, but in my mind, there's always room for improvement. So far, my friends are the only ones running my chassis. I'll have to be a harsher critic of myself if I'm going to send them out into the world, haha.

 

[Gula]

Neat. Really? I could probably get one made for free then. I'm a jack of all trades, and
"machining " is one of them. Maybe my old job can waterjet one out for me........

 

[HenryCrawllins]

Neat. Really? I could probably get one made for free then. I'm a jack of all trades, and
"machining " is one of them. Maybe my old job can waterjet one out for me........

For sure! Shoot me a DM and we can exchange emails. I'll send you the chassis file, and a basic parts list. It will be cool to start getting some outside opinions on the chassis.