TexRC KerbTex Medium Radius (300mm) 90deg Corner

Overview

TexRC KerbTex Medium Radius (300mm) 45deg Corner to fit 65mm square downpipe. The corner can be used to connect downpipes sections together to create an RC car track. See my other projects for 45 degree corners and hairpins.

https://www.printables.com/@H_427287/collections/2125292

These kerbs work really well on indoor carpet RC tracks, the sizing suits almost any touring car class and even GT12's which need a nice low profile kerb. The inspiration for the kerbs was to replicate the kerbs on full size racing tracks where it is possible to ride the kerbs with an RC car as part of the racing line. There is something very satisfying when rubber is laid down onto the kerbs during an event. Unlike rc car track kerbs that don't have walls and just sit next to the downpipe these KerbTex ones are a fully integrated tidy solution.

The kerbs parts are printed from PETG for the base and flexible TPU for the walls, with some wood baton and screws making up the remaining assembly.

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Key features of these kerbs are:

-Kerb profile encourages ‘close to the apex driving’ whilst minimising the chance of any car breakages. The ramped shape generally causes cars to gently roll rather than hitting a solid objects.

-The flexible TPU walls are gentle on cars when they're hit and are virtually indestructible. I have no personally broken any at my local club in the 18 months they have been used. Also the capped top of the walls helps prevent cars from being launched into the air if they are hit.

-The profile of the walls also prevent wheels and axles to ‘grab’ therefore minimising the chance of breaking hubs

-Locking pins on the end of the kerbs allow them to have a fixed connection onto the 65mm square downpipes, while still having the ‘quick release’ capability to allow quick assembly as disassembly of a track.

-Modular design allowing items to be easily and quickly replaced for new printed parts if anything unfortunately becomes damaged. 

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Printing notes:

For printed components I would recommend starting from the 3MF file as this has optimised infill settings and modifiers to reinforce specific areas of the prints. I have also included the gCode that I use for a mk3s.

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The parts list for one corner assembly is as follows:

PetG:

• Kerb V1 - Medium Rad - Quantity 4
• Kerb V1 - Strut Medium Rad - Quantity 2
• Kerb V1 Coupler - Medium Rad A  - Quantity 1
• Kerb V1 Coupler - Medium Rad B  - Quantity 1
• Kerb V1 - End A - Quantity 1
• Kerb V1 - End B - Quantity 1
• Kerb V1 Interconnect Dowel x 5

TPU (95a):

• Kerb Wall V1 - Medium Rad  - Quantity 2
• Kerb Wall V1 - End  - Quantity 2
• Kerb V1 Coupler - Peg - Quantiy 2

Other parts:

• 4mm-4.5mm x 45mm wood screw - Quantity 6
• 4mm-4.5mm x 60mm wood screw - Quantity 6
• 4mm-4.5mm x 80mm wood screw - Quantity 6
• 22mm x 47mm x 215mm wood baton - Quantity 2
• 22mm x 47mm x 175mm wood baton - Quantity 2
• M3 x 12mm countersunk screw - Quantity 10

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Build notes:

• Please see the below images for the layout of how everything goes together. Ultimately its virtually impossible on build it incorrectly. 

• On the wall printed from TPU you will need to cut away the support material that is attached to the inside.

• For use at our club we add grip tape and velcro to the underside of the kerbs to help them stay in position on the tracks
• All the screws only need to be ‘nipped up’ so no need to go hulk mode on this build.
• The drill gauge can be used to drill a 3mm pilot hole in the 65mm square downpipe, and then oppened up with a 25mm hole drill.