Hovercraft I built using some computer fans, foam board, hot glue, and a shower curtain. Carries up to 70lbs and I have managed about 45mph before the whole thing lifts off and rolls over. It is a responsive and powerful machine.
I suppose I could add something like a gyro and it would be easier to drive, but I almost prefer the way it handles like this over heading hold and other features. I do have plans to make it autonomous which is why I'm using an Arduino MEGA and NRF24L01 Radios for the controller. It also allows me the telemetry data you see on the bottom of the screen.
