Boeing Military
Model 853-21 Quiet Bird

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General Info

Boeing Model 853-21 Quiet Bird

Model 835-21 Quiet Bird
Role US Army observation study
Manufacturer Boeing
Number built 1/2 scale mockup produced

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History Boeing Model 853-21 Quiet Bird 

For years, all the aviation world knew about Boeing’s secret stealth project from the 1960s was limited to a name and a single mysterious photo. It seemed like a relic out of time, possessing many stealthy design features that wouldn’t exist until decades later, and even then, only in highly classified black projects.

The concept dates back to the early 1960s, with a one-half scale model of the aircraft being built sometime between 1962 and 1963. The aircraft was an exercise in utilizing specific materials and shapes to drastically reduce the radar cross-section of a tactical aircraft. From this pioneering design, five Boeing “stealth” patents were awarded, and they only appear to have shown up in public records in the early 1990s, decades after they were officially filed. The model of Quiet Bird was said to have been tested at 

Boeing’s Wichita facility in 1962-1963, all of which occurred on a radar range. No actual flight testing of Quiet Bird itself was said to have happened, though. But the tests were highly successful: they proved that it was possible to drastically decrease the radar signature of a tactical aircraft. Wiki Link

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Boeing Model 853-21 Quiet Bird

Boeing BCA Military Airplanes

Boeing Military Airplanes
Model 853-21 Quiet Bird

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General characteristics

• Crew: 1
• Length: 33 ft 0 in (10.06 m)
• Wingspan: 33 ft 7.8 in (10.26 m)
• Height: 7.7 ft (2.3 m)
• Wing area: 179.5 sq ft (16.67 m²)

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Powerplant

• Airfoil: 65A415
• Empty weight: 6,000 lb (2,721 kg)
• Gross weight: 8,150 lb (3,696 kg)
• Powerplant: 1 × General Electric CF700 , 4,200 lbf (19 kN) thrust

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Specifications

• Stall speed: 80 kn (92 mph, 150 km/h)
• Range: 1,160 nmi (1,330 mi, 2,150 km)
• Service ceiling: 47,000 ft (14,000 m)
• Rate of climb: 3,050 ft/min (15.5 m/s)
• Wing loading: 45.4 lb/sq ft (221 kg/m²)

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Development

• Development of the Model 853-21 began in 1962 at Boeing Wichita, only a 1/2 scale prototype was produced which never flew, but tests showed that it had a very low radar cross-section (stealth aircraft)

Special Links Model 853-21 Quiet Bird

Links to Youtube & Others

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Model 853-21 Quiet Bird

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Youtube Link

Throughout the 1990s, a team of engineers from McDonnell Douglas’ Phantom Works developed and tested a unique stealth fighter shrowded in the secrecy of Area 51, known to most as the Bird of Prey.

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