Wipaire has received STC approval from the FAA for Hartzell Propeller's Yukon four-blade props with improved low-speed thrust, providing better take off and climb performance in Cessna Caravans.

Wipaire's modified Cessna Caravan with Hartzell's four-blade Yukon prop will be at EAA AirVenture Oshkosh, on static display at the Wipaire's booth (#162).

Hartzell worked with Wipaire, a leading aircraft engineering and manufacturing company based in Minnesota, to achieve FAA approval. The newly designed composite 110 inch diameter props are available with or without TKS ice protection or electric de-ice boots.

Wipaire flight test results showed there is up to a 26 per cent decrease in total take off distance from land and up to a 31 per cent decrease in take off from water on the Caravan with a Yukon prop. The improved performance can provide safer take offs and landings on smaller lakes and shorter runways.

Another important improvement is in weight savings. Coming in at 137 pounds, the Yukon is up to 19 pounds lighter than other available props.

The impressive flight performance with the Yukon is a credit to the engineers from both Hartzell and Wipaire, as well as Wipaire's test pilots. Wipaire's test results also confirmed that there is no change in Caravan stall speeds.

The Yukon is available with pitch locks, and its carbon composite construction and nickel leading edges reduce risks for corrosion.

The new Wipaire Yukon STC applies to:

- Cessna C208 and C208B floated or wheeled

- Pratt & Whitney Canada PT6A-114A 675 SHP engine (S/N 208B5000 and up)

- Pratt & Whitney Canada PT6A-140 867 SHP engine (S/N 208B5000 and up)