Nothing blows like "Big Moe", Air-O-Fan's most popular engine-driven sprayer, the D-2/40, is known throughout the world as the leader in performance and dependability, powered by a 225 horse power John Deere diesel engine "Big Moe" has set a name in history for superior coverage on any crop within a 60 foot canopy. The D-2/40 is the sprayer of choice for most commercial spray applicators here in the Central San Joaquin valley not to mention a vast number of growers in citrus, almonds, pistachios, walnuts & pecans. When people ask us engine drive vs. PTO drive whats better? We relate it this way, it take power to produce performance, a 100 horse power tractor pulling a PTO driven sprayer (say a GB-36R) at 90 PTO horse power has a 9 blade / 27 degree pitch fan forcing air through a 6.25" fan housing discharge throat. The GB-36R will do a great job and you will burn roughly 15 to 18 Gallon per hour of fuel at the tractor. Know take an 80 horse power tractor and toe the Big Moe through your field with 225 horse power and a 12" discharge fan housing throat propelling twin 40" fans. The results are staggering, one would think that the added performance would require much greater fuel consumption but the truth is our D-2/40 running wide open burns roughly 7.5 GPH and any given tractor toeing the "Big Moe" will burn roughly 5 to 10 GPH and the added performance from the dual 40" fans forcing turbulent air through a 12" discharge throat far exceeds the performance of any PTO sprayer at virtually the same cost in fuel consumption. - Less