Piqua, Ohio-based Hartzell Propeller has announced the development of a new two-blade Top Prop conversion kit for Piper PA-23-250 Aztec twins. The scimitar-shape, 77-inch propeller blades incorporate blade-mounted counterweights, offering greater redundancy for pitch control and feathering, compared with the original-equipment propellers that relied on air pressure. The shape of the blades is more efficient, yielding a 2-to-3-knot increase in cruise speed, and noise reduction of close to 2 dB(a). The conversion kits are available for Aztec C models through F models powered by Lycoming IO-540-C4B or TIO-540-C1A engines. They are available with 14- or 28-volt de-ice systems and include composite spinners. Total weight is 62 pounds per side, and installation is expected to take just a few hours, said Hartzell, since no changes are required to the prop governors. Through its dealer network, Hartzell is offering an introductory price of $21,950 for the basic kit, including a three-year/1,000-hour warranty and a six-year/2,400-hour time between overhaul. To date, Hartzell reports it has delivered more than 17,000 of its Top Prop conversions worldwide.
Hartzell Has Top Prop Available for Aztec Operators
Key Takeaways:
- Hartzell Propeller has released a new two-blade Top Prop conversion kit for Piper PA-23-250 Aztec twins (C through F models).
- The scimitar-shape blades offer improved pitch control redundancy with blade-mounted counterweights and enhanced efficiency.
- This upgrade provides a 2-to-3-knot increase in cruise speed and a noise reduction of nearly 2 dB(a).
- The kit, available for an introductory price of $21,950, includes a three-year/1,000-hour warranty and a six-year/2,400-hour time between overhaul.
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