<!-- This article is a part of [[Wikipedia:WikiProject Aircraft]]. Please see [[Wikipedia:WikiProject Aircraft/page content]] for recommended layout. --> {{Infobox aircraft | name = Brock KB-2 Freedom Machine | logo = | logo_size = | image = KenBrock.jpg | alt = | caption = Ken Brock at Oshkosh 2001 | long_caption = | other_names = | aircraft_type = [[Autogyro]] | aim = | outcome = | related = | national_origin = [[United States of America]] | manufacturer = [[Ken Brock Manufacturing]] | design_group = | designer = [[Ken Brock]] | builder = | issuer = | status = | owners = | primary_user = | more_users = | service = | major_applications = | proposals = | prototypes = | number_built = | construction_number = | civil_registration = | military_serial = | radio_code = | requirement = | aircraft_carried = | flights = | total_hours = | total_distance = | construction_date = | introduction = | retired = | first_flight = 1970 | initiated = | in_service = | last_flight = | expected = | developed_from = [[Brock KB-1 Gyroplane]] | variants = | developed_into = | preservation = | fate = | predecessors = | successors = | concluded = }}

The '''KB-2 Freedom Machine''' is an [[autogyro]] designed by Ken Brock based on the designs of the [[Bensen B-8]].<ref>{{cite web|title=Brock KB-2 Gyroplane|url=http://museum.eaa.org/collection/aircraft/Brock%20KB-2%20Gyroplane.asp#TopOfPage|accessdate=29 March 2011|archive-url=https://web.archive.org/web/20110719095750/http://museum.eaa.org/collection/aircraft/Brock%20KB-2%20Gyroplane.asp#TopOfPage|archive-date=19 July 2011|url-status=dead}}</ref><ref name="KitplanesFeb2005">Downey, Julia: ''2005 Trikes 'Chutes and Rotorcraft Directory'', Kitplanes, Volume 22, Number 2, February 2005, page 57. Belvoir Publications. ISSN 0891-1851</ref>

==Design and development== Ken Brock was an early innovator in homebuilt gyrocopters starting with his first ride in 1957.<ref>{{cite book|title=Book of buffs, masters, mavens, and uncommon experts|url=https://archive.org/details/bookofbuffsmaste00doer|url-access=registration|author=Henry Doering|year=1980}}</ref> Brock set to work on building and marketing a series of homebuilt gyroplanes with the KB-1 and later the KB-2.<ref>{{cite journal|journal=Popular Science|title=Good Gyrations|date=November 1998}}</ref> <!-- ==Design== may be combined with above as "Design and development" -->

==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]].<ref>{{cite journal|journal=Popular Mechanics|date=Nov 1971}}</ref>

==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.<ref>{{cite journal|journal=Popular Science|date=February 1982}}</ref> <!-- ==Units using this aircraft/Operators (choose)== -->

==Aircraft on display== A 1970 demonstrator KB-2 is in the [[EAA Airventure Museum]] in [[Oshkosh, Wisconsin]]

==Specifications (KB-2) == {{Aircraft specs |ref=EAA<!-- for giving the reference for the data --> |prime units?=kts<!-- imp or kts first for US aircraft, and UK aircraft pre-metrification, met(ric) first for all others. You MUST choose a format, or no specifications will show --> <!-- General characteristics --> |genhide=

|crew= |capacity=1 |length m= |length ft= |length in= |length note= |width m=<!-- if applicable --> |width ft=<!-- if applicable --> |width in=<!-- if applicable --> |width note= |height m= |height ft= |height in= |height note= |wing area sqm= |wing area sqft= |wing area note= |airfoil= |empty weight kg= |empty weight lb=240 |empty weight note= |gross weight kg= |gross weight lb=600 |gross weight note= |fuel capacity= |more general= <!-- Powerplant --> |eng1 number=1 |eng1 name=[[McCulloch Motors Corporation|McCulloch 4318]] |eng1 type= |eng1 kw=<!-- prop engines --> |eng1 hp=90<!-- prop engines -->

|prop blade number=<!-- propeller aircraft --> |prop name= |prop dia m=<!-- propeller aircraft --> |prop dia ft=<!-- propeller aircraft --> |prop dia in=<!-- propeller aircraft --> |prop note=

|rot number=2<!-- helicopters --> |rot dia m=<!-- helicopters --> |rot dia ft=12<!-- helicopters --> |rot dia in=<!-- helicopters --> |rot area sqm=<!-- helicopters --> |rot area sqft=<!-- helicopters --> |rot area note= <!-- Performance --> |perfhide=

|max speed kmh= |max speed mph= |max speed kts= |max speed note= |cruise speed kmh= |cruise speed mph=70 |cruise speed kts= |cruise speed note= |never exceed speed kmh= |never exceed speed mph= |never exceed speed kts= |never exceed speed note= |minimum control speed kmh= |minimum control speed mph= |minimum control speed kts= |minimum control speed note= |range km= |range miles=600 |range nmi= |range note= |endurance=<!-- if range unknown --> |ceiling m= |ceiling ft= |ceiling note= |g limits=<!-- aerobatic --> |roll rate=<!-- aerobatic --> |glide ratio=<!-- sailplanes --> |climb rate ms= |climb rate ftmin=1900 |climb rate note= |time to altitude= |disk loading kg/m2= |disk loading lb/sqft= |disk loading note= |power/mass= |thrust/weight= |more performance= |avionics= }}

==See also== {{aircontent <!-- include as many lines are appropriate. additional lines/entries with carriage return. --> |see also= |related=<!-- related developments --> |similar aircraft= *[[Bensen B-8]] *[[Midwest Hornet]] *[[Taggart Gyrobee]] *[[Wallis WA-116 Agile]] |lists=<!-- related lists --> }}

==References== {{Commons category|Brock KB-2}} {{reflist}} <!-- ==External links== --> {{Ken Brock aircraft}}

[[Category:1970s United States sport aircraft]] [[Category:Single-engined pusher autogyros]] [[Category:Homebuilt aircraft]] [[Category:Ken Brock aircraft]] [[Category:Aircraft first flown in 1970]]