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The KB-2 Freedom Machine is an autogyro designed by Ken Brock based on the designs of the Bensen B-8.[1][2]

Brock KB-2 Freedom Machine
Ken Brock at Oshkosh 2001
Role	Autogyro Type of aircraft
National origin	United States of America
Manufacturer	Ken Brock Mfg
Designer	Ken Brock
First flight	1970
Developed from	Brock KB-1 Gyroplane

Design and development

Ken Brock was an early innovator in homebuilt gyrocopters starting with his first ride in 1957.[3] Brock set to work on building and marketing a series of homebuilt gyroplanes with the KB-1 and later the KB-2.[4]

Operational history

Ken Brock used his KB-2 design for years in airshow acts and completed several world records. In 1971 he completed the first coast-to-coast autogyro flight from Long Beach, California to Kitty Hawk, North Carolina.[5]

Variants

KB-2

Powered variant

KB-2G

Variant with the same frame and rotor head as a KB-2. The "glider" is a two-seat gyroplane designed to be towed by car. The aircraft with the same frame and rotor assembly can be converted to a powered gyroplane.[6]

Aircraft on display

A 1970 demonstrator KB-2 is in the EAA Airventure Museum in Oshkosh, Wisconsin

Specifications (KB-2)

Data from EAA

General characteristics

• Capacity: 1
• Empty weight: 240 lb (109 kg)
• Gross weight: 600 lb (272 kg)
• Powerplant: 1 × McCulloch 4318 , 90 hp (67 kW)
• Main rotor diameter: 2 × 12 ft (3.7 m)

Performance

• Cruise speed: 61 kn (70 mph, 110 km/h)
• Range: 520 nmi (600 mi, 970 km)
• Rate of climb: 1,900 ft/min (9.7 m/s)

See also

Aircraft of comparable role, configuration, and era

• Bensen B-8
• Wallis WA-116 Agile

References

Wikimedia Commons has media related to Brock KB-2.

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