Both teams have ten hours to build combines, or in this case, combat harvesters. The machine that cuts the most crop in a pristine oat field will be crowned the combine king. Blue team built a delivery truck to have chopper mounted in front of the truck, connected to the back of the vehicle with a duct going through the windscreen. Red team mounted lawnmowers at the rear of a van, with a driver on top of the van to control the height of the lawnmowers.