Rubber band-driven car

The STEMFIE rubber-band-driven car is easy and quick to build and demonstrates the retention and controlled release of energy to achieve motion. The inspiration for this design is borrowed from science classes in schools, using the mousetrap car.

Information – Parts list – Build plates – Downloads – Assembly steps – Gallery

Information

Number of 3D-printed parts: 44
Number of buildplates: 4 plates < 140 x 140 mm)
Non-printed items: A short piece of string, three small rubber bands.
Tools: Spanner (SPN-TOL-0004) and driver (SPN-TOL-0001)
Assembly time: 10 minutes

Parts list

Click the links below to download each individual STL file. You can also download the ready-made four build plates.

Beam AGD ESS USH SYM BU3x2x1 - SPN-BEM-0301 (1x)
Beam STR ESS BU04x01x01 - SPN-BEM-0041 (1x)
Brace CRN ERR ASYM BU1x2x6x0.25 - SPN-BRC-0102 (2x)
Brace STR ERR BU04x01x00.25 - SPN-BRC-0003 (4x)
Nut PH CL BU1x5mm - SPN-NUT-0018 (6x)
Nut CPN RH BU1x1.75 - SPN-NUT-0038 (1x)
Nut RH BU01.00x5mm - SPN-NUT-0001 (1x)
Pin CL RHD BU1.75 - SPN-PIN-0047 (4x)
Pin CL RHD BU4.25 - SPN-PIN-0057 (1x)
Pin CL RHD BU5.75 - SPN-PIN-0063 (1x)
Wheel PLY FXD BRD THREYE BU1x1 - SPN-WHL0005 (1x)
Shoulder Screw RHD RH BU01.00 - SPN-SSC-0044 (1x)
Shoulder Screw RHD RH BU01.75 - SPN-SSC-0047 (1x)
Sign URL SLTD BU1x1x3x1 - SPN-SGN-0001 (1x)
Pin SPP INR LCT BDR BU1.00x0.50 - SPN-PIN-0094 (1x)
Washer FXD BU1x0.25 - SPN-WSR-0001 (7x)
Washer FRE BU1x0.25 - SPN-WSR-0038 (6x)
Wheel GND TTRD FRE BU3.00x1.00 - SPN-WHL-0001 (2x)
Wheel GND TTRD FXD BU3.00x1.00 - SPN-WHL-0002 (2x)
Tool Driver NUT SCR PIN THR - SPN-TOL-0001 (1x)
Tool Spanner NUT - SPN-TOL-0004 (1x)
Instruction URL sign

Build plates

SPS 000001 assembly step0 stemfie.org build plates

Click the links below to download each ready-made build plate.

Sign, nuts, washers and pulley
Wheels
Beams and braces
Shoulder screws and pins
Complet set (all four plates above in one file - 3MF format - 165 x 165 mm)

Downloads

All the files and instructions for making this project will be released shortly. Stay tuned via the newsletter to receive the download link. Note that you, in the meantime, can do download the ready-made build plates (above) and start 3D printing.