Editing ATR 42 (section)

=== 42-600S STOL ===

During the late 2010s, ATR conducted a feasibility study into developing the ATR 42's [[short takeoff and landing]] (STOL) capabilities, potentially enabling the type to make use of runways as short as {{convert|800|m|ft|abbr=on}} via the adoption of enhanced brakes and a drastically modified tail unit; the company viewed this measure as expanding the aircraft's potential and opening new sales possibilities.<ref name="lease freight ain">Sheppard, Ian. [http://www.ainonline.com/aviation-news/air-transport/2017-06-07/atr-creates-leasing-asset-management-freighter-unit "ATR Creates Leasing, Asset Management & Freighter Unit."] ''AIN Online'', 7 June 2017.</ref> It could introduce a steep approach capability and operating costs that compare to 30-seaters.<ref name="lease freight ain" />

STOL improvements should be launched in 2019 to reduce landing distance from {{cvt|1100| to| 800|m|abbr=on}}.<ref>{{cite news |url= http://aviationweek.com/commercial-aviation/atr-maintains-its-low-risk-strategy |title= ATR Maintains Its Low-Risk Strategy |date= 4 February 2019 |author= Thierry Dubois |work= Aviation Week & Space Technology}}</ref>
Existing [[flight control surface|control surfaces]] would be re-engineered with takeoff [[wing flap|flaps]] extended to 25°, and both spoilers deploying at landing and not only for inflight turns, adding an [[autobrake]] system, while the [[aircraft rudder|rudder]] is modified to increase its maximum deflection and the [[vertical stabilizer]]'s size is increased, to counter an [[Turbine engine failure|engine failure]], lowering the [[minimum control speed]].<ref>{{cite news |url= https://aviationweek.com/commercial-aviation/atr-developing-string-upgrades-regional-turboprops |title= ATR Is Developing A String Upgrades For Regional Turboprops |date= 21 February 2019 |author= Thierry Dubois |work= Aviation Week & Space Technology}}</ref>

ATR estimates a market for STOL 20–42 seaters of 800 over 30 years, to serve islands and deliver cargo to short runways.<!--ref name=AvWeek9apr2019-->
The ATR 42-600S empty weight will be reduced with lighter seats and galley fittings.<ref name=AvWeek9apr2019>{{cite news |url= https://aviationweek.com/commercial-aviation/atr-working-launch-orders-short-field-42-600 |title= ATR Working on Launch Orders For Short-Field 42-600 |date= 9 April 2019 |author= Bradley Perrett |work= Aviation Week Network}}</ref> The variant was officially announced at the June 2019 [[Paris Air Show]]. Irish lessor Elix Aviation Capital will be the launch customer, taking 10 aircraft from 2022 to 2024; commitments from [[Air Tahiti]] and another undisclosed customer bring the total order book to 17.<ref>{{cite news |last1=Moores |first1=Victoria |title=ATR Secures 17 Commitments For New ATR 42 STOL Variant |url=https://aviationweek.com/awincommercial/atr-secures-17-commitments-new-atr-42-stol-variant |work=Aviation Daily |date=19 June 2019 |language=en}}</ref>

On 9 October 2019, ATR launched the ATR 42-600S at the [[European Regions Airline Association]] General Assembly, with 20 commitments including from Elix Aviation Capital (10 aircraft) and Air Tahiti (two aircraft).<!--ref name=ATR9oct2019-->
Capable of operating from {{cvt|800|m}} runways with up to 42 passengers, certification is expected for the second half of 2022 before first delivery.<!--ref name=ATR9oct2019-->
The ATR 42-600S can access close to 500 airports with an {{cvt|800-1,000|m|abbr=on}} runway, expanding its addressable market by 25%.<ref name=ATR9oct2019>{{cite press release |url= http://www.atraircraft.com/newsroom/news-a-brand-new-addition-to-the-atr-aircraft-family-the-atr-42-600s-_64.html |title= A brand new addition to the ATR aircraft family – the ATR 42-600S!|date= 9 October 2019 |publisher= ATR}}</ref> 800 m runway operation is limited to {{cvt|200|nmi}} long flights with 70% used seats.<ref>{{Cite web|url=https://www.atr-aircraft.com/aircraft-services/aircraft-family/atr-42-600s-stol/|title=ATR 42-600 STOL Aircraft &#124; ATR Aircraft|website=ATR}}</ref>

The variant made a 2h 15min maiden flight on 11 May 2022, while the larger rudder will be fitted at the end of 2022 before the certification phase start in 2023.<ref>{{cite news |url= https://www.flightglobal.com/air-transport/short-take-off-atr-42-variant-carries-out-maiden-flight/148607.article |title= Short take-off ATR 42 variant carries out maiden flight |author= David Kaminski-Morrow |date= 11 May 2022 |work= Flightglobal}}</ref>

In November 2024 ATR terminated the development of the 42-600S STOL version, opting instead to focus on improving the efficiency of the entire ATR 42 and ATR 72 families.<ref>{{cite web |last1=Meier |first1=Ricardo |title=ATR abandons short take-off and landing variant ATR 42-600S - Air Data News |url=https://www.airdatanews.com/atr-abandons-short-take-off-and-landing-variant-atr-42-600s/ |website=www.airdatanews.com |publisher=airdatanews |access-date=29 November 2024 |date=14 November 2024}}</ref><ref>{{cite web |last1=Jaworowski |first1=Raymond |title=ATR Ceases Development of ATR 42-600S STOL Version |url=https://flightplan.forecastinternational.com/2024/11/15/atr-ceases-development-of-atr-42-600s-stol-version/ |website=Flight Plan |publisher=Flight Plan |access-date=29 November 2024 |date=15 November 2024}}</ref>