Hand Drive: A wheelchair attachment that allows any wheelchair to be powered in a rowing motion. It is 3D printable, open source, and available to all.

We were given the challenge to hack a wheelchair and make it better. Through research, we discovered that lever-powered wheelchairs were proven to be a better physical motion for the user. We also discovered how expensive they were—anywhere from $2,000-$10,000. Instead of redesigning the wheelchair, we came up with the idea of a Hand Drive [...]