Zenith STOL CH 701 explained

The Zenith STOL CH 701 and CH 750 are a family of light, two-place kit-built STOL aircraft designed by Canadian aeronautical engineer Chris Heintz through his Midland, Ontario, based company, Zenair. The CH 701 first flew in 1986 and the design is still in production.[1] [2] The CH 750 was first introduced in 2008.[3] The CH 701 was later developed into the four-place Zenith STOL CH 801.[2] [4]

The kit is produced and distributed in the US by the Zenith Aircraft Company of Mexico, Missouri, and complete drawings, including blueprints and manuals, are also available for the design. In Europe, the CH 701 was manufactured under license by Czech Aircraft Works (CZAW) from 1992 until 2006, when the license agreement was ended.

Design and development

Designed for off-runway operations, the all-metal CH 701 has many features that contribute to the aircraft's capabilities, such as a high-lift wing with full-span, non-movable leading edge slots, an all-flying rudder, large tires, flaperons and an inverted elevator. Heintz also designed a unique tricycle gear amphibious float system for the CH 701.

Standard engines used are the 640NaN0 Rotax 582 two-stroke, the 800NaN0 Rotax 912UL, the 1000NaN0 Rotax 912ULS and the 850NaN0 Jabiru 2200 four-stroke powerplants.[5] The aircraft has also been equipped with the JLT Motors Ecoyota engine,[6] [7] as well as popular 4 cylinder Continental engines (A-65/C-85) which Zenith still offers an engine mount for.[8]

The STOL CH 701 has the unique distinction of being what is probably the most copied light aircraft in production today. Several dozen unauthorized versions have been produced around the world.[9]

Designed to the Light Aircraft Manufacturers Association of Canada (LAMAC) design standard DS 10141, in its native country of Canada the CH 701 can be built and flown as a basic ultralight, advanced ultralight or amateur-built.[10] [11] The CH 701 can be flown under microlight or ultralight rules in several other countries also. American pilots may fly the CH 701 under Light-sport Aircraft rules or as an experimental amateur-built.[2] The CH 750 is designed to comply with the US Light sport aircraft rules.[3]

Operational history

By the fall of 2007, 750 CH 701s had been completed and were flying.[2] In July 2014, representatives of the company gathered volunteers of the EAA Airventure airshow to build a CH-750 kit in a one-week timeframe.[12]

Variants

STOL CH 701
  • Original version. 960lbs gross and 10 gal header tank. steel spring gear and Rotax 503.[13]
    STOL CH 701SP
  • Comes with two standard wing tanks, solid aluminum spring gear. Smaller refinements to achieve a gross weight of 1100 lbs (500 kg).[14]
    STOL CH 750
  • Introduced at AirVenture 2008, the STOL CH 750 has an enlarged cabin with wider doors and is optimized for US Light Sport Aircraft rules with a maximum takeoff weight of 1320 lbs (600 kg). Builders may also opt to register it for operation on water at 1430 lbs (650 kg) while remaining within the LSA limits, or as an experimental amateur-built aircraft up to 1440 lbs (655 kg.)[3] The STOL CH 750 was also to be factory-built by AMD as a Special Light Sport Aircraft but as of 2014 is listed by the FAA as no longer produced as an SLSA.[15]
    CH 750 Cruzer
  • Introduced at Sun 'n Fun 2013, the CH-750 Cruzer uses a new wing without the leading-edge slats of the STOL CH 750, and a newly designed tail with a separate vertical fin and rudder, rather than the all-flying rudder of the STOL version. The model is optimized for cross-country speed rather than STOL capabilities, although the specified 350 ft (107 m) ground roll of the Cruzer qualifies as STOL by most definitions. It mounts wheel pants as standard (although these may be removed and larger wheels installed) and the prototype is powered by a 1300NaN0 ULPower UL350is fuel injected engine, although other engines in the NaN0NaN0 range can be used.[16] [17] [18]
    STOL CH750 Super Duty
  • This model introduced greater carrying capacity and climb capabilities. It can be powered by engines with a range of 150to, with the prototype powered by a 2050NaN0 Aero Sport Power IO-375 powerplant, which gave a cruise speed of 1050NaN0 and a rate of climb of 1350 fpm (6.9 m/s). Gross weight is 19000NaN0, with a typical empty weight of 11000NaN0.[19]
    Nuncats Sky jeep
  • Electric-powered derivative of CH 750, that was first flown in January 2023.[20] [21] [22]

    Operators

    See also

    References

    Bibliography

    Notes and References

    1. Vandermeullen 2011, p. 77.
    2. Kitplanes Staff 2007, p. 80.
    3. http://www.zenithair.com/stolch750/index.html "STOL CH 750 Light sport Utility."
    4. Bayerl et al. 2011, p. 128.
    5. http://www.zenithair.com/stolch701/7-engine.html "STOL CH 701 Engine."
    6. Tacke, Willi; Marino Boric; et al: World Directory of Light Aviation 2015-16, pages 256-257. Flying Pages Europe SARL, 2015.
    7. Web site: Le Nouveau Moteur 4 Temps Pour Ulm. 15 March 2018. JLT Motors. ecoyota.neuf.fr. 2007. https://web.archive.org/web/20081014121101/http://ecoyota.neuf.fr:80/Page_1x.html/. 14 October 2008.
    8. Web site: STOL CH 701 Engine / Powerplant . 2023-05-07 . www.zenithair.com.
    9. http://www.zenithair.com/stolch701/7-photo-copies.html 'STOL CH701.'
    10. http://www.tc.gc.ca/civilaviation/general/recavi/Ultralight/ULTransitionStrategy/menu.htm "Ultra-light Transition Strategy."
    11. http://www.tc.gc.ca/civilaviation/general/CCARCS/advancedullist.htm "Listing of models eligible to be registered as advanced Ultra-Light aeroplanes (AULA)."
    12. https://issuu.com/eaahq/docs/avt_072714_final2 "Aviation community unites behind one week wonder."
    13. Web site: Zenith STOL Serial No. 001 flies again — General Aviation News . 2023-05-07 . generalaviationnews.com . 7 July 2020 . en-US.
    14. Web site: STOL CH 701 Performance and Specifications: Real Short Take Off and Landing performance. www.zenithair.com. 21 September 2018.
    15. [Federal Aviation Administration]
    16. Niles, Russ. "Zenair Introduces CH-750 Cruzer." AVweb, April 12, 2013. Retrieved: September 4, 2017.
    17. http://www.zenithair.com/stolch750/750-crz-performance.html "Zenith CH 750/Cruzer Comparison."
    18. Tacke et al. 2015, p. 135.
    19. Web site: Zenith Aircraft Company. zenithair.net. 30 March 2019.
    20. Batchelor 2021, p. 62.
    21. Calderwood, Dave. "'Electric sky jeep' from Old Buckenham company". Flyer, 11 May 2021. Retrieved 29 June 2021.
    22. Web site: Electric Zenith CH 750 Completes First Flight. 31 January 2023. O'Connor. Kate . AVweb. 30 January 2023. https://archive.today/20230131132019/https://www.avweb.com/recent-updates/experimentals/electric-zenith-ch-750-completes-first-flight/. 31 January 2023. live.
    23. "Airscene: Aero India" 2001, pp. 254–255.

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