1950's Space Age 83" Experimental 2-Bladed Polished Helicopter Rotor Airplane Propeller

This exceptional polished aluminum propeller is a one-of-a-kind aviation display piece, originally acquired from the New England Air Museum in its original condition. The museum regularly receives donations from Pratt & Whitney, Sikorsky, Raytheon, and Kaman, and this propeller is believed to have been an experimental aircraft propeller or helicopter rotor developed by one of these leading aerospace companies in the 1940s or 1950s.

Experimental Status & Unique Markings

A key feature of this propeller is the stamped marking on the brass part of hub: "EXP USE ONLY," confirming its experimental status. Other stampings on the hub and blades include:

• A70708MP, B12, EXP USE ONLY (on Brass of Hub)
• SK14446, SER# 8, and the number 1 (right side of hub)
• Number 2 (left side of hub)
• MP70736 (bottom ridge of hub)
• AF35704 and AF35728 (bottom of blades)

Refinement & High-Mirror Finish

This propeller has undergone a complete transformation, with all original internal parts removed, leaving only the hub and blades intact. The entire piece has been completely disassembled, cleaned, and sanded, then high polished to a high-mirror aluminum finish. A custom dome spinner cap was added to enhance its sleek, futuristic look.

*** STAND NOT INCLUDED ***

Specifications & Features

• Era: Circa 1940s-1950s, determined by original internal components, including vintage FAFNIR Company bearings and hand-stamped identification numbers.
• Material: All-aluminum construction, fully polished for a brilliant reflective finish.
• Dimensions:
  • Overall Length: 83 inches
  • Blade Length: 41 inches (widest section: 5.5 inches)
  • Depth: 10.5 inches (hub base to spinner top)
  • Weight: 38 lbs
• Blades slide into the hub and are secured with set screws.
• Designed for wall mounting via the hub using a lag bolt.

Aviation History Meets Modern Art

This experimental propeller has been transformed into a museum-quality display piece with a space-age aesthetic. Its brilliant mirror-like polish makes it an ideal conversation piece for collectors, aviation enthusiasts, and design aficionados. Whether displayed in a loft, office, or industrial-inspired space, this propeller brings a striking combination of aerospace history and modern design.

Own a rare and authentic piece of aviation innovation today.

*** STAND NOT INCLUDED ***