Brock KB-3
{{Short description|American gyroplane}}
{{Use mdy dates|date=January 2022}}
{{Use American English|date=January 2022}}
| {{Infobox aircraft begin
| name=KB-3 | image=Ken Brock KB-3 Gyrocopter (N112SW).jpg | caption= }}{{Infobox aircraft type | type=Autogyro | national origin=United States | manufacturer=Ken Brock Mfg | designer=Ken Brock | first flight= | introduced=1985 | retired= | status=Production completed | primary user= | more users= | produced= 1985-2005 | number built=200 (2005) | program cost= | unit cost= US$12,000 (2001) | developed from= Brock KB-2 | variants with their own articles= }} |
The Brock KB-3 is an American autogyro that was designed by Ken Brock, produced by Ken Brock Mfg and introduced in 1985. The aircraft was supplied as a kit for amateur construction and was also available as plans.Cliche, Andre: Ultralight Aircraft Shopper's Guide 8th Edition, page F-3. Cybair Limited Publishing, 2001. {{ISBN|0-9680628-1-4}}Downey, Julia: 2005 Trikes 'Chutes and Rotorcraft Directory, Kitplanes, Volume 22, Number 2, February 2005, page 57. Belvoir Publications. ISSN 0891-1851
Design and development
The KB-3 was derived from the 1970 KB-2 and specifically designed to comply with the US FAR 103 Ultralight Vehicles rules, including the category's maximum empty weight of {{convert|254|lb|kg|0|abbr=on}}. The aircraft has a standard empty weight of {{convert|250|lb|kg|0|abbr=on}}. It features a single main rotor, a single-seat open cockpit without a windshield, tricycle landing gear and a twin cylinder, liquid-cooled, two-stroke, dual-ignition {{convert|64|hp|kW|0|abbr=on}} Rotax 582 engine in pusher configuration.
The aircraft fuselage is made from bolted-together aluminum tubing. Its {{convert|22|ft|m|1|abbr=on}} diameter rotor has two blades. Factory available options included a main rotor pre-rotator, a rotor brake and an instrument package. Fuel capacity is {{convert|5|u.s.gal}} and is housed in a combination pilot seat/fuel tank.
Due to its small size and light weight the KB-3 is easy to transport by trailer and can be set up to fly in ten minutes.
Specifications (KB-3)
{{Aircraft specs
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|empty weight lb=250
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|gross weight lb=600
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|fuel capacity={{convert|5|u.s.gal}}
|more general=
|eng1 number=1
|eng1 name=Rotax 582
|eng1 type=twin cylinder, liquid-cooled, two-stroke dual-ignition aircraft engine
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|eng1 hp=64
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|rot dia ft=22
|rot dia in=0
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|rot area sqft=380
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|max speed kmh=
|max speed mph=63
|max speed kts=
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|cruise speed mph=60
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|range km=
|range miles=100
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|ceiling m=
|ceiling ft=10000
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|climb rate ftmin=1200
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|disk loading lb/sqft=1.58
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References
{{Commons category|Brock KB-3}}
{{reflist}}
{{Ken Brock aircraft}}
Category:1980s United States sport aircraft