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

Item description from the seller

*** STAND NOT INCLUDED *** 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. 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 Me

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