Slot.it HRS2 Chassis Assembly

KensRedZed · 17th-Jul-23, 08:21 PM

I prefer 2-body posts for most 1/32 scale cars. My first few scratch built cars were not very succesful until Chris Walker told me about installing urethane washers between the chassis and body posts. I started winning races immediately after that. I've never looked back. Thanks again, Chris! Thumbup

BARacer · 17th-Jul-23, 08:53 PM

Yes, I can see that body rock without control is no benefit.

This is going to be an interesting challenge.

KensRedZed · 18th-Jul-23, 12:50 AM

Allow me a few pictures.

These are the parts I typically use for body posts.

The urethane washer holds the stainless steel screw and washer in place.

I can push on either side of the car and it leans with some effort.

As soon as I let the body go free. It quickly and perfectly re-centers itself.

I have won a fair amount of races in my club with this type of body float. It's a keeper.

munter · 18th-Jul-23, 05:53 AM

Nice job, Ken.
I have often thought of moulding and casting some urethane washers...what dimensions are they OD, ID and diameter.???

KensRedZed · 18th-Jul-23, 11:42 AM

Thanks John,

The guy that casts these urethanes just copies steel washers. These are for a 2-56 size thread. I use 4-40 screws. So I needed to add a 2.5mm washer to prevent the urethane from slipping past the screw and through the hole in the chassis. I can't convince him to cast 4-40 size urethanes for some reason. So I adapt.

I'll try and measure the rubbery little things for you after my first coffee. Umm... maybe my second. Thumbup

chrisguyw · 18th-Jul-23, 01:34 PM

(18th-Jul-23, 05:53 AM)munter Wrote: I have often thought of moulding and casting some urethane washers...what dimensions are they OD, ID and diameter.???

Hello John, the "DART" hobbies washers *** that Ken shows are urethane and measure 4.7mm od. , 2.4mm id., and are .77mm thick.

The silicone washers from MRSlotcar *** measure 4.8mm od., 2.6mm id., and come in 3 thicknesses from .5mm to 1.5mm.,........so if you are making your own, something in the above diameter range will work great.

****These are squishy little buggers, so while the measurements are close, I won't swear that they are 100% (not that it matters) Bigsmile

Cheers
Chris Walker

PS while they do work well between body posts/chassis, they are far more beneficial between the pod lugs and chassis plates on plastic cars.

KensRedZed · 18th-Jul-23, 04:38 PM

What pod? Where? Bigsmile

munter · 20th-Jul-23, 10:36 PM

Thanks Chris and Ken...
I will have a look at what washers I have on hand and see what I can do.....when there is a suitable moment in my busy moulding, casting, vac forming regimen.