Rans S-9 Chaos

{{Short description|American homebuilt airplane}} {{Use mdy dates|date=January 2022}} {{Use American English|date=January 2022}}  {{Infobox aircraft | name = S-9 Chaos | logo = | logo_size = | image = File:Rans S-9 Chaos.JPG | alt = | caption = | long_caption = | other_names = | aircraft_type = [[Kit aircraft]] | aim = | outcome = | related = | national_origin = [[United States]] | manufacturer = [[Rans Inc]] | design_group = | designer = Randy Schlitter | builder = | issuer = | status = In production | owners = | primary_user = | more_users = | service = | major_applications = | proposals = | prototypes = | number_built = 215 (2011) | construction_number = | civil_registration = | military_serial = | radio_code = | requirement = | aircraft_carried = | flights = | total_hours = | total_distance = | construction_date = 1986-2006, 2009-present | introduction = 1986 | retired = | first_flight = 1986 | initiated = | in_service = | last_flight = | expected = | developed_from = | variants = [[Rans S-10 Sakota]] | developed_into = | preservation = | fate = | predecessors = | successors = | concluded = }} The '''Rans S-9 Chaos''' is an American single-engined, [[tractor configuration]], single-seat, mid-wing [[monoplane]] designed by Randy Schlitter for [[aerobatics]] and manufactured by [[Rans Inc]]. The Chaos is available in [[Homebuilt aircraft|kit form]] for amateur construction.<ref name="KitplanesDec1998">Downey, Julia: ''1999 Kit Aircraft Directory'', Kitplanes, Volume 15, Number 12, December 1998, page 65. Primedia Publications. ISSN 0891-1851</ref><ref name="Aerocrafter">Purdy, Don: ''AeroCrafter - Homebuilt Aircraft Sourcebook'', page 239. BAI Communications. {{ISBN|0-9636409-4-1}}</ref><ref name="ChaosOverview">{{Cite web|url = http://www.rans.com/_KITS/ModelsPages/S-9.htm|title = S-9 Chaos|access-date = 24 November 2010|last = Rans|date = n.d.}}</ref><ref name="WDLA04">Bertrand, Noel; Rene Coulon; et al: ''World Directory of Leisure Aviation 2003-04'', page 157. Pagefast Ltd, Lancaster OK, 2003. ISSN 1368-485X</ref><ref name="JAWA8788">Taylor, John (ed): ''Jane's All The World's Aircraft 1987-1988'', pages 698-699. Jane's Publishing Company, 1987. {{ISBN|0-7106-0850-0}}</ref><ref name="JAWA8889">Taylor, John (ed): ''Jane's All The World's Aircraft 1988-1989'', pages 592-594. Jane's Publishing Company, 1988. {{ISBN|0-7106-0867-5}}</ref><ref name="KitplanesDec2011">Vandermeullen, Richard: ''2011 Kit Aircraft Buyer's Guide'', Kitplanes, Volume 28, Number 12, December 2011, page 68. Belvoir Publications. ISSN 0891-1851</ref>

Production of the S-9 was ended as part of Rans' reorganization of its product line on 1 June 2006, after having been available for 20 years, but the S-9 was reintroduced in about 2009 and is again available.<ref name="ChaosOverview" /><ref name="ANN11May06">{{Cite web|url = http://www.aero-news.net/index.cfm?printable=1&ContentBlockID=6d11beb7-3213-455e-8a69-fc07a3edac5b&|title = RANS: Light Sport Aircraft Are The Future|access-date = 21 November 2010|last = Aero News Network|date=May 2006}}</ref><ref name="KitplanesDec2007">Downey, Julia: ''2008 Kit Aircraft Directory'', Kitplanes, Volume 24, Number 12, December 2007, page 53. Primedia Publications. ISSN 0891-1851</ref>

==Design and development== The S-9 Chaos was designed by Randy Schlitter in 1986 as an inexpensive aerobatic aircraft that will allow sportsman competition aerobatics to be flown or even advanced aerobatics if inverted fuel and oil systems are installed. The Chaos is also a capable cross country aircraft.<ref name="ChaosOverview" />

Like many Rans models, the S-9 features a welded [[4130 steel]] tube cockpit, with a bolted [[aluminum]] tube rear fuselage. All [[fuselage]], wing and tail surfaces are covered in [[Aircraft fabric covering|dope and fabric]]. The reported construction time is 500 man-hours.<ref name="KitplanesDec1998" /><ref name="Aerocrafter" />

The Chaos has [[conventional landing gear]]. The basic engine is the [[Rotax 503]] of {{convert|50|hp|kW|0|abbr=on}}, with the [[Rotax 582]] of {{convert|64|hp|kW|0|abbr=on}} and the [[Hirth 3701]] of {{convert|100|hp|kW|0|abbr=on}} available as options.<ref name="KitplanesDec1998" /><ref name="Aerocrafter" /><ref name="Spec">{{Cite web|url = http://www.rans.com/_KITS/ModelsPages/S-9specs.htm|title = RANS S-9 Chaos|access-date = 24 November 2010|last = Rans|date = n.d.}}</ref>

The [[Rans S-10 Sakota|S-10 Sakota]] aerobatic two-seater was later developed from the S-9.<ref name="Aerocrafter" />

==Operational history== There were 215 S-9s built and flown by December 2011.<ref name="KitplanesDec2011" />

In November 2010 there were 61 S-9s registered in the United States, along with three registered in Canada and two in the UK.<ref name="FAAreg">{{Cite web|url = http://registry.faa.gov/aircraftinquiry/AcftRef_Results.aspx?Mfrtxt=&Modeltxt=RANS+S-9&PageNo=1|title = Make / Model Inquiry Results|access-date = 24 November 2010|last = Federal Aviation Administration|author-link = Federal Aviation Administration|date=November 2010}}</ref><ref name="TCCARS">{{Cite web|url = http://wwwapps2.tc.gc.ca/Saf-Sec-Sur/2/ccarcs/aspscripts/en/quicksearch.asp|title = Canadian Civil Aircraft Register|access-date = 24 November 2010|last = Transport Canada|author-link = Transport Canada|date = November 2010|url-status = dead|archive-url = https://web.archive.org/web/20110718042755/http://wwwapps2.tc.gc.ca/Saf-Sec-Sur/2/ccarcs/aspscripts/en/quicksearch.asp|archive-date = 18 July 2011}}</ref><ref name="GINFO">{{Cite web|url = http://www.caa.co.uk/application.aspx?catid=60&pagetype=65&appid=1&mode=summary&aircrafttype=RANS%20S9|title = GINFO Search Results Summary|access-date = 24 November 2010|last = Civil Aviation Authority (United Kingdom)|author-link = Civil Aviation Authority (United Kingdom)|date=November 2010}}</ref> Another 23 were on the registers of European countries west of Russia.<ref name="Ereg">{{cite book |title=European registers handbook 2010 |last= Partington |first=Dave |year=2010|publisher= Air Britain (Historians) Ltd|location= Coulsdon, Surrey|isbn= 978-0-7106-2916-6 }}</ref>

==Specifications (S-9)== {{Aircraft specs |ref=Kitplanes and Aerocrafter<ref name="KitplanesDec1998" /><ref name="Aerocrafter" />

|prime units?=imp  |genhide=

|perfhide=

|max speed kmh= |max speed mph= |max speed kts= |max speed note= |cruise speed kmh= |cruise speed mph=85 |cruise speed kts= |cruise speed note= |stall speed kmh= |stall speed mph=33 |stall speed kts= |stall speed note= |never exceed speed kmh= |never exceed speed mph= |never exceed speed kts= |never exceed speed note= |range km= |range miles=210 |range nmi= |range note= |endurance= |ceiling m= |ceiling ft=15500 |ceiling note= |g limits= |roll rate= |glide ratio= |climb rate ms= |climb rate ftmin=800 |climb rate note= |time to altitude= |lift to drag= |wing loading kg/m2= |wing loading lb/sqft= |wing loading note= |fuel consumption kg/km= |fuel consumption lb/mi= |power/mass= |more performance= |avionics=*none }}

==See also== {{aircontent  |see also= |related= |similar aircraft= * [[Murphy Renegade]] * [[Pitts Special]] |lists= }}

==References== {{Reflist|30em}}

==External links== {{commons category}} *{{Official website|http://www.rans.com/aircraft/kits/s-9-chaos.html}} *[http://www.airliners.net/photo/Rans-S-9-Chaos/1786889/&sid=4b557ba3e076d95168cfc75c99095f18 Photo of an S-9 Chaos] *[http://www.airliners.net/photo/Rans-S-9-Chaos/1761520/&sid=4b557ba3e076d95168cfc75c99095f18 Photo of an S-9 Chaos descending under a parachute after a structural failure]

[[Category:1980s United States civil utility aircraft]] [[Category:Homebuilt aircraft]] [[Category:Rans aircraft|S-009 Chaos]] [[Category:Aerobatic aircraft]] [[Category:Mid-wing aircraft]] [[Category:Single-engined tractor aircraft]] [[Category:Aircraft first flown in 1986]]