STOL

Source: Wikipedia, the free encyclopedia.
For other uses, see Stol (disambiguation).
Zenair CH 701
STOL light aircraft

A short takeoff and landing (STOL)

high altitude or ice). STOL aircraft, including those used in scheduled passenger airline operations, have also been operated from STOLport
airfields which feature short runways.

Design considerations

GAF Nomad of the Philippine Air Force

Many

Peterson 260SE. Autogyros also have STOL capability, needing a short ground roll to get airborne, but capable of a near-zero ground roll when landing.[citation needed
]

thrust reversers or spoilers (less common). Overall STOL performance is set by the length of runway needed to land or take off, whichever is longer.[1]

Fieseler Storch with German Luftwaffe
markings

Of equal importance to short ground run is the ability to clear obstacles, such as hills, on both take off and landing. For takeoff, large

forward slip (causing the aeroplane to fly somewhat sideways through the air to increase drag).[citation needed
]

Normally, a STOL aircraft will have a large

payload lifting ability. The payload is critical, because many small, isolated communities rely on STOL aircraft as their only transportation link to the outside world for passengers or cargo; examples include many communities in the Canadian north and Alaska.[citation needed
]

Most STOL aircraft can land either on- or off-airport. Typical off-airport landing areas include snow or ice (using skis), fields or gravel riverbanks (often using special fat, low-pressure tundra tires), and water (using floats): these areas are often extremely short and obstructed by tall trees or hills. Wheel skis and amphibious floats combine wheels with skis or floats, allowing the choice of landing on snow/water or a prepared runway.[citation needed]

Kits

Cessna 182K

A number of aircraft modification companies offer STOL kits for improving short-field performance.

  • 185.[3]
  • Piper PA-28 models.[4][5][6]
  • elevator and on the fin. Kits are available for a large number of light aircraft types.[7]
  • Sierra Industries sells Robertson STOL kits, marketed under the name R/STOL, incorporate a drooped leading edge cuff, wing fences, drooping ailerons and an automatic trim system. The company says that installation "allows 15 to 25 MPH slower approaches and requires up to 40% less runway distance". R/STOL kits are available for various Cessna models.[8][9][10]
  • Stolairus Aviation of Kelowna, British Columbia, has developed STOL Kits for the de Havilland Canada DHC-2 Beaver and de Havilland Canada DHC-3 Otter to increase lift and reduce stall speeds. The DHC-2 Beaver STOL Kit includes a contoured leading edge, flap-gap seals, wing fences and drooped wingtips. The DHC-3 Otter STOL Kit includes a contoured leading edge and drooped wingtips.[11]

STOLport

Main article: STOLport

A STOLport is an airport designed with STOL operations in mind, normally having a short single runway.[12][13]

STOLports are not common but can be found, for example, at London City Airport in London, United Kingdom. There were also several STOLports in the United States that were used for scheduled passenger airline operations but are now no longer in existence.

CESTOL

Cruise-efficient short takeoff and landing (CESTOL), is an aircraft with both very short runway requirements and high cruise speeds (greater than Mach 0.8).[2][14][15]

Definitions

Many different definitions of STOL have been used by different authorities and nations at various times and for a myriad of regulatory and military purposes.[16] Some accepted definitions of STOL include:

short takeoff and landing: (

DOD/NATO) The ability of an aircraft to clear a 50-foot (15 meters) obstacle within 1,500 feet (450 meters) of commencing takeoff or in landing, to stop within 1,500 feet (450 meters) after passing over a 50-foot (15 meters) obstacle. Also called STOL.

— Department of Defense Dictionary of Military and Associated Terms (JP 1-02)[17]

STOL (Short Take Off and Landing). STOL performance of an aircraft is the ability of aircraft to take off and clear a 50-foot obstruction in a distance of 1,500 feet from beginning the takeoff run. It must also be able to stop within 1,500 feet after crossing a 50-foot obstacle on landing.

— Dictionary of Aeronautical Terms[18]

An aircraft that, at some weight within its approved operating weight, is capable of operating from a STOL runway in compliance with the applicable STOL characteristics and airworthiness, operations, noise, and pollution standards" and ""aircraft" means any machine capable of deriving support in the atmosphere

— Transport Canada[19][20] and Arizona Department of Transportation[21]

A STOL aircraft is an aircraft with a certified performance capability to execute approaches along a glideslope of 6 degrees or steeper and to execute missed approaches at a climb gradient sufficient to clear a 15:1 missed approach surface at sea level... A STOL runway is one which is specifically designated and marked for STOL aircraft operations, and designed and maintained to specified standards.

— US Federal Aviation Administration[22]

Heavier-than-air craft that cannot take off and land vertically, but can operate within areas substantially more confined than those normally required by aircraft of the same size. Derived from short takeoff and landing aircraft.

— McGraw-Hill Dictionary of Scientific & Technical Terms[23]

short takeoff and landing aircraft (STOL), heavier-than-air craft, capable of rising from and descending to the ground with only a short length of runway, but incapable of doing so vertically. The precise definition of an STOL aircraft has not been universally agreed upon. However, it has been tentatively defined as an aircraft that upon taking off needs only 1,000 ft (305 m) of runway to clear a 50-ft (15-m) obstacle at the end of that distance and upon landing can clear the same obstacle and then land within 1,000 ft.

— Columbia Encyclopedia[16]

The STOL mode of flight is one during which an airplane taking off or landing is operated at climb-out and approach speeds lower than the conventionally accepted margins of airspeed above the power-off stalling speed of the airplane.

— Lieutenant Colonel Walter P. Maiersperger, USAF (Ret)[24]

Additionally, some aircraft manufacturers market their products as STOL without providing evidence that the aircraft meets any accepted definition.[25]

See also

References

  1. ^ "What's the definition of STOL in aviation?". Viking Air Ltd. 2015-12-02. Retrieved 2021-12-20.
  2. ^ a b "Powered Lift: Novel GTRI Design Would Let Commercial Jets Use Smaller Airports While Reducing Noise". Georgia Tech Research Institute. Retrieved 2010-10-28.
  3. ^ Crosswinds S.T.O.L. Inc. (2011). "Crosswinds STOL Inc". Retrieved 2011-02-23.
  4. ^ Horton, Inc. "Description of the Horton STOL Kit". Retrieved 2009-12-26.
  5. ^ Horton, Inc. "Frequently Asked Questions About the Horton STOL Kit". Retrieved 2009-12-26.
  6. ^ Horton, Inc. "Horton STOL Kit Pricing". Retrieved 2009-12-26.
  7. ^ Micro AeroDynamics Inc (2009). "Micro Vortex Generators for Single and Twin Engine Aircraft". Retrieved 2009-12-26.
  8. ^ Sierra Industries (2007). "Sierra R/STOL High Lift Systems for Piston Engine Aircraft". Retrieved 2009-12-26.
  9. ^ Sierra Industries (2007). "Sierra R/STOL Performance Comparison Charts". Retrieved 2009-12-26.
  10. ^ Sierra Industries (2007). "Modifications - Sierra R/STOL High Lift Systems for Piston Engine Aircraft". Retrieved 2009-12-26.
  11. ^ "DHC-2 Beaver." Stolairus Retrieved: February 2, 2012.
  12. Time Magazine
    . Aug. 16, 1968.
  13. ^ Stolport Manual Archived 2006-10-13 at the Wayback Machine (Doc 9150) International Civil Aviation Organization (ICAO)
  14. ^ Hange, Craig E (2005-04-25). "Short Field Take-Off and Landing Performance as an Enabling Technology for a Greener, More Efficient Airspace System" (PDF). Ames Research Center, NASA. Retrieved 2010-10-28.
  15. ^ "Novel Design". Aerospace Manufacturing and Design. May 2011. Retrieved 2011-05-08.
  16. ^ a b Columbia Encyclopedia. "short takeoff and landing aircraft". Answers.com. Retrieved 2009-12-25.
  17. ^ "Department of Defense Dictionary of Military and Associated Terms (JP 1-02)". United States Department of Defense. Archived from the original on 2011-06-05. Retrieved 2009-12-22.
  18. ISBN 1-56027-287-2
  19. ^ Transport Canada (November 2009). "Glossary for Pilots and Air Traffic Services Personnel (TP 1158E)". Retrieved 2009-12-15.
  20. ^ Transport Canada (September 2009). "Aeronautics Act - November 2007 Consolidation". Retrieved 2009-12-25.
  21. ^ Arizona Department of Transportation. "Appendix B" (PDF). Archived from the original (PDF) on March 14, 2009. Retrieved 2009-12-15.
  22. ^ US House of Representatives Committee of Science and Technology (July 1984). "Statement of John Kern, Deputy Director of Flight Operations, FAA" (PDF). Retrieved 2009-12-15.
  23. ^ McGraw-Hill Dictionary of Scientific & Technical Terms (2003). "STOL aircraft". Retrieved 2009-12-25.
  24. ^ Maiersperger, Walter P., Lieutenant Colonel, USAF (Ret) (March–April 1968). "What is STOL?". Retrieved 2009-12-25.{{cite web}}: CS1 maint: multiple names: authors list (link)
  25. ^ Fisher Flying Products. "Horizon 1". Retrieved 2009-10-27.

External links

External videos
video icon STOL Ultralight taking off and landing
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