# Rans S-9 Chaos

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American homebuilt airplane

S-9 Chaos General information Type Kit aircraft National origin United States Manufacturer Rans Inc Designer Randy Schlitter Status In production Number built 215 (2011) History Manufactured 1986-2006, 2009-present Introduction date 1986 First flight 1986 Variant Rans S-10 Sakota

The **Rans S-9 Chaos** is an American single-engined, [tractor configuration](/source/Tractor_configuration), single-seat, mid-wing [monoplane](/source/Monoplane) designed by Randy Schlitter for [aerobatics](/source/Aerobatics) and manufactured by [Rans Inc](/source/Rans_Inc). The Chaos is available in [kit form](/source/Homebuilt_aircraft) for amateur construction.[1][2][3][4][5][6][7]

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.[3][8][9]

## 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.[3]

Like many Rans models, the S-9 features a welded [4130 steel](/source/4130_steel) tube cockpit, with a bolted [aluminum](/source/Aluminum) tube rear fuselage. All [fuselage](/source/Fuselage), wing and tail surfaces are covered in [dope and fabric](/source/Aircraft_fabric_covering). The reported construction time is 500 man-hours.[1][2]

The Chaos has [conventional landing gear](/source/Conventional_landing_gear). The basic engine is the [Rotax 503](/source/Rotax_503) of 50 hp (37 kW), with the [Rotax 582](/source/Rotax_582) of 64 hp (48 kW) and the [Hirth 3701](/source/Hirth_3701) of 100 hp (75 kW) available as options.[1][2][10]

The [S-10 Sakota](/source/Rans_S-10_Sakota) aerobatic two-seater was later developed from the S-9.[2]

## Operational history

There were 215 S-9s built and flown by December 2011.[7]

In November 2010 there were 61 S-9s registered in the United States, along with three registered in Canada and two in the UK.[11][12][13] Another 23 were on the registers of European countries west of Russia.[14]

## Specifications (S-9)

*Data from* Kitplanes and Aerocrafter[1][2]

**General characteristics**

- **Crew:** One

- **Length:** 15 ft 8 in (4.78 m)

- **Wingspan:** 22 ft 0 in (6.71 m)

- **Wing area:** 91.5 sq ft (8.50 m2)

- **Empty weight:** 320 lb (145 kg)

- **Gross weight:** 670 lb (304 kg)

- **Fuel capacity:** 9 US gallons (34 litres)

- **Powerplant:** 1 × [Rotax 503](/source/Rotax_503) , 50 hp (37 kW)

- **Propellers:** 2-bladed wooden

**Performance**

- **Cruise speed:** 85 mph (137 km/h, 74 kn)

- **Stall speed:** 33 mph (53 km/h, 29 kn)

- **Range:** 210 mi (340 km, 180 nmi)

- **Service ceiling:** 15,500 ft (4,700 m)

- **Rate of climb:** 800 ft/min (4.1 m/s)

**Avionics**

- none

## See also

**Aircraft of comparable role, configuration, and era**

- [Murphy Renegade](/source/Murphy_Renegade)

- [Pitts Special](/source/Pitts_Special)

## References

1. ^ [***a***](#cite_ref-KitplanesDec1998_1-0) [***b***](#cite_ref-KitplanesDec1998_1-1) [***c***](#cite_ref-KitplanesDec1998_1-2) [***d***](#cite_ref-KitplanesDec1998_1-3) Downey, Julia: *1999 Kit Aircraft Directory*, Kitplanes, Volume 15, Number 12, December 1998, page 65. Primedia Publications. ISSN 0891-1851

1. ^ [***a***](#cite_ref-Aerocrafter_2-0) [***b***](#cite_ref-Aerocrafter_2-1) [***c***](#cite_ref-Aerocrafter_2-2) [***d***](#cite_ref-Aerocrafter_2-3) [***e***](#cite_ref-Aerocrafter_2-4) Purdy, Don: *AeroCrafter - Homebuilt Aircraft Sourcebook*, page 239. BAI Communications. [ISBN](/source/ISBN_(identifier)) [0-9636409-4-1](https://en.wikipedia.org/wiki/Special:BookSources/0-9636409-4-1)

1. ^ [***a***](#cite_ref-ChaosOverview_3-0) [***b***](#cite_ref-ChaosOverview_3-1) [***c***](#cite_ref-ChaosOverview_3-2) Rans (n.d.). ["S-9 Chaos"](http://www.rans.com/_KITS/ModelsPages/S-9.htm). Retrieved November 24, 2010.

1. **[^](#cite_ref-WDLA04_4-0)** Bertrand, Noel; Rene Coulon; et al: *World Directory of Leisure Aviation 2003-04*, page 157. Pagefast Ltd, Lancaster OK, 2003. ISSN 1368-485X

1. **[^](#cite_ref-JAWA8788_5-0)** Taylor, John (ed): *Jane's All The World's Aircraft 1987-1988*, pages 698-699. Jane's Publishing Company, 1987. [ISBN](/source/ISBN_(identifier)) [0-7106-0850-0](https://en.wikipedia.org/wiki/Special:BookSources/0-7106-0850-0)

1. **[^](#cite_ref-JAWA8889_6-0)** Taylor, John (ed): *Jane's All The World's Aircraft 1988-1989*, pages 592-594. Jane's Publishing Company, 1988. [ISBN](/source/ISBN_(identifier)) [0-7106-0867-5](https://en.wikipedia.org/wiki/Special:BookSources/0-7106-0867-5)

1. ^ [***a***](#cite_ref-KitplanesDec2011_7-0) [***b***](#cite_ref-KitplanesDec2011_7-1) Vandermeullen, Richard: *2011 Kit Aircraft Buyer's Guide*, Kitplanes, Volume 28, Number 12, December 2011, page 68. Belvoir Publications. ISSN 0891-1851

1. **[^](#cite_ref-ANN11May06_8-0)** Aero News Network (May 2006). ["RANS: Light Sport Aircraft Are The Future"](http://www.aero-news.net/index.cfm?printable=1&ContentBlockID=6d11beb7-3213-455e-8a69-fc07a3edac5b&). Retrieved November 21, 2010.

1. **[^](#cite_ref-KitplanesDec2007_9-0)** Downey, Julia: *2008 Kit Aircraft Directory*, Kitplanes, Volume 24, Number 12, December 2007, page 53. Primedia Publications. ISSN 0891-1851

1. **[^](#cite_ref-Spec_10-0)** Rans (n.d.). ["RANS S-9 Chaos"](http://www.rans.com/_KITS/ModelsPages/S-9specs.htm). Retrieved November 24, 2010.

1. **[^](#cite_ref-FAAreg_11-0)** [Federal Aviation Administration](/source/Federal_Aviation_Administration) (November 2010). ["Make / Model Inquiry Results"](http://registry.faa.gov/aircraftinquiry/AcftRef_Results.aspx?Mfrtxt=&Modeltxt=RANS+S-9&PageNo=1). Retrieved November 24, 2010.

1. **[^](#cite_ref-TCCARS_12-0)** [Transport Canada](/source/Transport_Canada) (November 2010). ["Canadian Civil Aircraft Register"](https://web.archive.org/web/20110718042755/http://wwwapps2.tc.gc.ca/Saf-Sec-Sur/2/ccarcs/aspscripts/en/quicksearch.asp). Archived from [the original](http://wwwapps2.tc.gc.ca/Saf-Sec-Sur/2/ccarcs/aspscripts/en/quicksearch.asp) on July 18, 2011. Retrieved November 24, 2010.

1. **[^](#cite_ref-GINFO_13-0)** [Civil Aviation Authority (United Kingdom)](/source/Civil_Aviation_Authority_(United_Kingdom)) (November 2010). ["GINFO Search Results Summary"](http://www.caa.co.uk/application.aspx?catid=60&pagetype=65&appid=1&mode=summary&aircrafttype=RANS%20S9). Retrieved November 24, 2010.

1. **[^](#cite_ref-Ereg_14-0)** Partington, Dave (2010). *European registers handbook 2010*. Coulsdon, Surrey: Air Britain (Historians) Ltd. [ISBN](/source/ISBN_(identifier)) [978-0-7106-2916-6](https://en.wikipedia.org/wiki/Special:BookSources/978-0-7106-2916-6).

## External links

Wikimedia Commons has media related to [RANS S-9 Chaos](https://commons.wikimedia.org/wiki/Category:RANS_S-9_Chaos).

- [Official website](http://www.rans.com/aircraft/kits/s-9-chaos.html)

- [Photo of an S-9 Chaos](http://www.airliners.net/photo/Rans-S-9-Chaos/1786889/&sid=4b557ba3e076d95168cfc75c99095f18)

- [Photo of an S-9 Chaos descending under a parachute after a structural failure](http://www.airliners.net/photo/Rans-S-9-Chaos/1761520/&sid=4b557ba3e076d95168cfc75c99095f18)

v t e Aircraft produced by Rans Designs Homebuilt aircraft S-4 Coyote S-5 Coyote S-6 Coyote II S-7 Courier S-9 Chaos S-10 Sakota S-11 Pursuit S-12 Airaile S-14 Airaile S-15 Pursuit II S-16 Shekari S-17 Stinger S-18 Stinger II S-19 Venterra S-20 Raven S-21 Outbound

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Adapted from the Wikipedia article [Rans S-9 Chaos](https://en.wikipedia.org/wiki/Rans_S-9_Chaos) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/Rans_S-9_Chaos?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.