So I am on a team that is building a hovercraft. For our lift motor we are using a .21a ASP airplane engine. The issue is due to a design issue the prop is blocked, meaning it can't be started from the front. What I would like to know is if there is a way to put a pull start mechanism (like the kind found on the rc cars) onto the existing motor. Any and all ideas welcomed, including alternatives to the pull start.