Rubber band torque meter

thingiverse

Torque Meter for Rubber Band Model Airplanes You'll need the following materials: 2x 1.5x4x2 mm bearings (I purchased this one: https://www.kullagergrossisten.se/product/1-5x4x2-metalltat) 1x aluminum pipe with a 4mm inner and 6mm outer diameter 1.5 mm music wire 0.3 mm music wire One or two screws for securing the 0.3 mm music wire in the back (I used M4, but smaller sizes would be better if two screws are used) The indicator is printed with TPU 95A and the rest with PLA. The 1.5 mm music wire serves as a hook for the rubber band, with the indicator snugly seated on it using friction. The 0.3 mm music wire is soldered to the 1.5 mm wire inside the aluminum pipe in the front. Two holes need to be drilled in the back for the screws that secure the wire. A scale for the indicator to display torque values must be added. This can be done by using two fixed weights and calculating the torque from those weights, with the rest of the torque values increasing or decreasing linearly. To attach the torque meter to a table or holder, modifications are necessary. If an aluminum pipe cannot be obtained, it can be printed in plastic instead. However, this is not recommended as it's difficult to print and less durable. This torque meter was developed with input from David Brohede.