[What's_nitro?]

B15, the thought had occurred. I could do it, but it would require much more fabrication. Physically turning the fan around would be impractical, and reversing the fan would not work well since the thrust produced while running in the reverse direction would be minimal. The only other way would be to construct ducting around the sides to face forward, and then a means to convert from normal thrust and re-route the air through these side ducts. Extra servos/radio channels would be required. It wouldn't be as easy to drive with either, if you think about it, since brakes can usually stop a vehicle much more quickly than the vehicle can accelerate. With reverse-thrust brakes it would be a 1:1 ratio between acceleration and braking, therefore you need as much room to stop as you did to get going at that speed. I can see this method working perfectly for a drag car since they usually have plenty of room to stop.