The new technology 82.5-inch diameter five-blade propeller is available as an optional performance upgrade in place of the four-blade Hartzell aluminum propeller that is standard equipment on the Turbine Evolution. In addition to new aircraft kits, the new carbon fiber propeller is available as an upgrade for the 65 Turbine Evolutions flying today. Even though the new propeller has one more blade, it is 3.5 pounds lighter than the standard propeller including spinner and de-ice. In flight tests comparing the four-blade aluminum prop with Hartzell's new five-blade structural composite propeller, Elite Pilot Services documented a three knot increase in cruise speed and a 144 feet per minute increase in climb rate in the Turbine Evolution. The new five-blade Hartzell carbon fiber prop will be displayed on a Turbine Evolution aircraft during EAA AirVenture, held July 25-31 on Oshkosh's Wittman Regional Airport at the Evolution Aircraft Exhibit Booth 275-276 in the Main Aircraft Display area. Hartzell Propeller will also exhibit its other composite technology props, including a swept-tip Trailblazer prop at its Exhibit Booth 296-297.