can a knex engine work with compressed air or just with attaching the drive train with an electric motor
is it easy to make and is it good idea for prototyping you ideas??
thanks i know that i asked too much questions (im still beginner) and i know that the instuctables knex PROS will be helpful with me
PS ,can anybody tell me where can i get a good price buy for a knex kit that contain everything for my infinity innovation