This post will review an initial Sketchup model for the Electric Handcycle. It is based on measurements made at our kickoff meeting. Mostly, we'll use the design parameters of the Travel Bike, but with a 20" instead of a 16" wheel.
This model was made using my instructions by:
Note that the real design is being done by Cody Wojcik using Solidworks. This model is for visualizing the machine. It's reasonably accurate, but not at all suitable for dimensioning parts like the Solidworks model will be. Still, it is efficient, because Geoff made the model in 90 minutes based on my instructions over a Skype screen share. I had previously searched for lots of bike components, so we were ready to move quickly.
Overall length: 72"Front wheel: 20"Head tube angle: 55 degreesPedal height: 39 inchesPedal tube offset from head tube: 4 inchesRear track between tire centers: 24.5 inches
An earlier post showed the gearing range of the NEH vs Travel Bike. The NEH has a much wider gear range due to an intermediate derailleur. The Electric Handcycle will also have an intermediate derailleur. We're hoping to use a 9 to 44 tooth derailleur used on mountain bikes that use a single chainring.
Click the link below to download the Sketchup Model. It was made using Sketchup 2015.