Hartzell Propeller Gets Prop STC for Diesel-Powered DA-40 Aircraft

Owners can now replace a wood propeller with a Polaris composite propeller.

Meg Godlewski

Monday, June 27, 2022 at 04:40 PM ET

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The DA40-NG with the standard Diamond DA40 NG MT wood/composite propeller. [Courtesy: Diamond Aircraft]

Key Takeaways:

Hartzell Propeller has received an FAA STC for a new three-bladed Polaris composite propeller for diesel-powered Diamond DA40 NG aircraft.
The new Polaris propeller replaces the standard wood/composite prop, offering improved climb performance, a 2-3 knot increase in cruise speed, enhanced durability, and quieter operation.
This $24,613 conversion kit is designed for the Austro Engine E4-A and is limited to DA40 NGs equipped with specific cowling or exhaust system configurations.

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Owners of diesel-powered Diamond DA40 NG singles have a new option when it comes to a propeller/engine combination as Hartzell Propeller has received a supplemental type certificate (STC) from the FAA to replace the standard Diamond DA40 NG MT wood/composite propeller with the new and higher performance three-bladed lightweight Polaris composite propeller.

The Polaris is a 74-inch diameter, three-blade ASCII carbon fiber prop for the Austro Engine E4-A. [Courtesy: Hartzell Propeller]

The Polaris is a 74-inch diameter, three-blade ASCII carbon fiber prop for the Austro Engine E4-A. It features a lightweight Bantam aluminum hub and 2,400-hour/six-year TBO, with Hartzell’s warranty through first overhaul.