tools, materials & knowledge for model makers
In order to get the differential running smoothly I had to shim and make a simple jig. My original differential for the Burrell used bevels with a 20° angle. These kept locking / binding. Luckily JG pointed out my errors and made a number of calculations to come to 9.5° as the correct angle. As … Read more
Originally I went with 20° for the miniature Burrell differential bevel gears. However, they are not right and bind up. Then I was contacted by JG who had made some calculations on the gears and sent them through. JG’s opening words were “Ah… Bevels are a different animal 😀 well mostly, and certainly with ‘Gear cutter … Read more
It may only be 1/20th scale but I still need a differential for the Burrell traction engine. I’ve been working on the overall gearing for the Burrell and the layout of the gearing. For the overall gearing something around 10:1 feels reasonable. The layout for the 2 stage gearing and location of the layshaft took … Read more
Geared device between the driven wheels to allow varying rotational speeds of the wheels around corners. We see differentials in everything from the Chinese cart that has an arrow that always points south, in steam traction engines through to complex electromechanical differentials in formula one racing cars. My particular interest in the mechanical differential is … Read more