The only Boeing Vertol Model 360, N360BV, experimental prototype helicopter in existence, is on display at the American Helicopter Museum, at Brandywine Regional Airport, in West Chester, Pennsylvania.

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Built in 1987, the Boeing Model 360 was a advanced technology demonstrator as well as a new model for manufacturing methodology.

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The Boeing Model 360 is an American experimental medium-lift tandem rotor cargo helicopter developed privately by Boeing to demonstrate advanced helicopter technology.

The aircraft was intended as a technology demonstrator, with no plans to put the type into production, and many of its design features were carried onto other programs.

There was a large effort to streamline the helicopter to reduce drag in order to increase speed. This included a fully retractable landing gear.

The Boeing Model 360 differed from its brethren CH-46 and CH-47 tandem rotor helicopters by incorporating extensive amounts of high-strength, lightweight composite materials, making up almost all of the airframe's structure, and dynamic components, namely in advanced rotor heads along with graphite fuselage frames and longerons.

Compared with metal construction, the rotor hubs have 60 percent fewer parts, and the airframe has 83% fewer fasteners.

The fuselage skeleton is covered with load­ bearing Kevlar and Nomex honeycomb skin and crown panels that eliminate corrosion and reduce air­ frame empty weight by approximately 25 percent.

The two tandem four-bladed counter-rotating rotors were each driven by Avco Lycoming AL5512 turboshaft engines mounted on either side of the rear fuselage.

In another departure from its military brethren, the Model 360 had no external sponsons containing the landing gear or fuel. Fuel was contained in three crashworthy cells below the cabin floor.

The Model 360 featured a glass cockpit with six multi-function displays (MFD).

The Model 360 reached a maximum forward speed of 246 mph, just short of setting a new world record for helicopters.

General characteristics
• Length: 51 ft 0 in fuselage only
• Cabin width: 6 ft 4 in maximum
• Cabin height: 5 ft 11 in maximum
• Height: 19 ft 4.75 in
• Gross weight: 30,500 lb
• Fuel capacity: 824 US gal in 1x 238 US gal rear fuselage tank and 2x 293 US gal forward fuselage tanks
• Powerplant: 2 × Textron Lycoming AL5512 turboshaft engines, 4,200 shp each
• Main rotor diameter: 2× 50 ft 0 in
• Main rotor area: 3,927.5 sq ft
• Blade section: - root: Boeing VR-12; tip: Boeing VR-15
Performance
• Maximum speed: 230 mph
• Cruise speed: 210 mph
• Never exceed speed: 270 mph
Avionics
• Doppler radar
• Honeywell AFCS
• Bendix Integrated flight control and Flight management system
• Digital instrumentation on 6x CRT displays and computer controlled EADI and EHSI displays
• Multiplex digital databus

(Video by Dan’s Cool Videos)
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