AOK Fan (a Baker fan)
A Baker fan is a standardized fan which acts as a load for a tractor or engine. Using wind resistance (which varies with the speed of the fan), these could roughly indicate the maximum horsepower delivered by an engine by seeing how fast the fan could be turned, as indicated by a tachometer or other measuring device.
Today was also the first day that Pappy was significantly loaded down since all the bearings were redone, so it was both a debut for the fan, and, in a sense, for Pappy.
The fan officially debuted at the 2009 Maker Faire. Pappy drove one pulley of the fan, and the other pulley of the fan, in turn, drove the Dingus (display mode only- no smashing/crushing)
Later that year, we took it up to Chico to the Threshing Bee. You can see our fan next to a fan they already had. Note the similar, standardized construction dimensions, 2 feet by 2 feet for the (4) blades. We had never seen this fan before now.
It turns out that the baker fan is actually a tough load to turn. More than one gas tractor smoked their clutches trying to turn the fan…
Pappy had no trouble and steadily turned the AOK fan with ease. We measured approximately 320 RPM on the fan, so we know Pappy could have gone even faster!
Most recently, the AOK fan made and appearance at the KSW Rollout, Nov 14, 2009, celebrating our nonprofit status.