MT-Propeller Receives STCs for Composite Props on Piper, Cessna Twins

The company has designed new three- and four-blade props for the Piper PA-23 and Cessna 414, respectively.

Jonathan Welsh

Tuesday, November 21, 2023 at 05:14 PM ET

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MT's composite props give the Piper PA-23 a more stylish look. [Courtesy: MT-Propeller]

Key Takeaways:

MT-Propeller received a supplemental type certificate (STC) for its three-blade composite MTV-12 propeller on Piper PA-23-235 and PA-23-250 Aztec light twins, promising nearly vibration-free operation, unlimited service life, repairability, and improved ramp appeal.
The company also obtained an EASA STC (with an FAA STC in progress) for its four-blade MTV-14 propellers on Cessna 414 Chancellors, which deliver shorter takeoff, improved climb and cruise performance, reduced weight, and significant noise reduction.

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MT-Propeller received a supplemental type certificate (STC) for the installation of its three-blade MTV-12 propeller on Piper PA-23-235 and PA-23-250 Aztec light twins. The STC applies to aircraft powered by Lycoming O-540A, O-540B, and IO-540C engines.

The company said the damping characteristics of the new props result in nearly vibration-free operation. The composite blades have unlimited service life and can be repaired if damaged by foreign object debris.