PIQUA, Ohio — August 10, 1999 — Hartzell Propeller Inc. announced today that it has received a Supplemental Type Certificate (STC) for Piper Twin Comanche PA30 and PA39 aircraft including those fitted with counter-rotating and turbocharged engines.
The new two-bladed propellers are 70 inches in diameter and feature Hartzell’s exclusive “Q-tip” tip design. The conversion improves ground clearance, lowers noise levels and also includes improved durability double-wall spinners and a longer TBO of 2,400 hours or 6 years.
The conversion kit costs $18,900 and includes two propellers, two polished spinners, STC documentation as well as Hartzell’s Plus III warranty .
Hartzell Propeller Inc. is the world’s leading manufacturer of propeller systems, well-known for its advanced engineering and manufacturing capabilities. The company is rich in aviation heritage tracing its beginnings to relationships with Orville Wright and Glen Curtis. Significant technical innovations include the industry’s first full-feathering propeller for light twins, the first fully reversing propellers for corporate turboprops and the industry’s first composite structure blades. Hartzell was recently selected by NASA as the exclusive propeller partner for its General Aviation Propulsion (GAP) program – developing the next generation of general aviation propulsion systems. For more information on Hartzell visit the Web at www.hartzellprop.com.