Chassis Builds

[chappyman66]

Show off your chassis (and the rest) build....new thread in our own sub-forum.

[Kevan]

Yay!...build it and they (we) will come

[chappyman66]

Not saying I will run this one either.....but an Alfa Romeo T33/4 CanAm is a tough looking car. Not really a Group 7 car, though. And that guide length is really short....

[Kevan]

Rolling chassis, wheels and tyres for illustration purposes only.

Wheelbase looks OK, I had to shuffle the body back 1mm so the front edge of the chassis will need trimming.

Those tyres are 10mm wide at the back, 11mm looks about the max that will realistically fit.

I'm thinking of using the two rear mounts at the back of the pod to mount the motor and wing.

The body will need trimming to clear the end bell.

Bench testing looks like the tape seen should be enough, if the pod is taped at the sides also it feels too restricted. Only testing will prove this.

Chassis and pod have pockets that will comfortably accept 20g of lead.

[Kevan]

Flexible side body mounts.

Centreline pivot and reinforcing shaft with an old axle glued in the chassis but polished where it goes into the pod pivot.

Motor options are open at the moment, Shark, Pirahna, A. N. Other...

[Kevan]

The Eagle eyed will notice the pod has front mounts but the chassis hasn't, I don't use them and may delete them from the design but they could be used for flex adjusting screws or silicone pads underneath... or both.

[Rastas]

Made some progress on my Nissan V12 project , I'm going to do #23 Nissan R382. I had to remove the original exhaust to make some room for the motor ,and after much searching found a set of V12 headers on thingiverse now I've got to figure out how to make them fit back in to the same space that is left, went for a rattle can enamel paint the seats are from the 917 file I have the driver is the pilot file thingiverse again. can't remember where the body post file come from but should work ok . Waiting on the front wheels and tires so I can fix the body in place and the interior .

[chappyman66]

Nice work on the headers! Our have been made up as you saw. Looking forward to progress!

[Rastas]

I'm using an offset motor pod that's why I am having to go this route , hope it pays off with some good handling.LOL

[chappyman66]

Looking forward to finishing and seeing it run. Should have some time to tweak performance a bit, with cars not due until later.

[Pepsi 62]

Ferrari 350 Can Am, chassis came out nice. Still heaps to do

[Barc 1]

I have been working on a chassis. Many prints and revisions, to correct areas of weakness, but finally have something I think will work. Printed in resin with a mixture of 25% tenacious and 75% regular resin. It has flex and some bend and should be able to handle the stresses of racing.

It is a tripod from the guide receiver to the rear axle. Front wheels and floating chassis are one piece . The float is is attached to the pod with an adjustable torsion bar set up This is a printed piece with a wire running through it.

[chappyman66]

Dan,
I will be interested to see how your iso fulcrum design runs. I did one of the Artin chassis that way, and just wasn't much impressed. That might be because of the lack of stiffness in my Artin design, though. Maybe yours will be better.

Pepsi62......that's the chassis I am using as well.


I normally don't use the front mounting posts but that might work in the 350 CanAm. I see the 712 in the background......testing different options?

[Pepsi 62]

Yes have the 2 options, currently The 712 has a JS AW chassis under it that I'm testing for our club series. Am getting another of your 3 piece chassis printed up for it to try out.
Haven't decided on what mounts to use as yet, the centre front mount will be very close to the front edge of the cockpit so we will see how it all fits once I get all the running gear fitted.
It's all your work off thingiverse, using your body, chassis, driver bust interior plate and a SW chassis (hopefully but may revert to slotit pod), commercial guide though, haven't had any luck with guide prints

[Barc 1]

I have one chassis outfitted and have turned laps. To,control flex I had to add some cylinders longitudinally in the main pod to help stiffen it. I was thinking of a hollow tube that would allow me to slide in piano wire in the printed frame, and have not given up on that idea yet. That is the great thing about this 3D printing. Very simple to come up, with an idea and build it.

[chappyman66]

Well.... let's talk about wire for a minute.
One piece, as a pivot (like Kevan designed) is ok.

Designing a chassis to be tubes as carriers for wire or brass rods is in the hybrid chassis territory which is not allowed for the 3DP Group7 proxy. For your own use? Rock on.

For the proxy, the wire use has to be very limited. The point is to design a printed chassis to be run without adding a bunch of wire to stiffen it.

[Barc 1]

Well these chassis will be used for various races. I will most likely switch to these for all my proxy racing and move away from soldered brass.
If they work better with wire stiffening I will use it where I can. For this proxy I will just leave the wire out if that is what the rules state.