Takeoff and landing
Aircraft can have different ways to take off and land. Conventional airplanes accelerate along the ground until sufficient lift is generated for takeoff, and reverse the process to land. Some airplanes can take off at low speed, this being a short takeoff. Some aircraft such as helicopters and Harrier jump jets can take off and land vertically. Rockets also usually take off vertically, but some designs can land horizontally.
Horizontal takeoff and landing
Aircraft
Conventional takeoff and landing (CTOL)
Takeoff
Takeoff is the phase of
Landing
Landing is the last part of a
Reduced takeoff and landing (RTOL)
RTOL aircraft require shorter runways than conventional types, typically 3,500 feet (1,100 m) to 4,500 feet (1,400 m).[1]
Short takeoff and landing (STOL)
STOL is an acronym for short take-off and landing, aircraft with very short runway requirements, typically between 2,000 feet (610 m) to 3,500 feet (1,100 m).[1]
Catapult launch and arrested recovery (CATOBAR)
CATOBAR (catapult assisted takeoff but arrested recovery) is a system used for the launch and recovery of aircraft from the deck of an
Although this system is more costly than alternative methods, it provides greater flexibility in carrier operations, since it allows the vessel to support conventional aircraft. Alternate methods of launch and recovery can only use aircraft with STOVL or STOBAR capability.
Short Take Off But Arrested Recovery (STOBAR)
STOBAR (Short Take Off But Arrested Recovery) is a system used for the launch and recovery of aircraft from the deck of an aircraft carrier, combining elements of both STOVL (Short Take-Off and Vertical Landing) and CATOBAR (Catapult Assisted Take-Off But Arrested Recovery).
Spacecraft (HTHL)
Horizontal takeoff, horizontal landing (HTHL) — is the mode of operation for the first private commercial spaceplane, the two-stage-to-space
The
Both the
An early example was the 1960s Northrop HL-10 atmospheric test aircraft where the HL stands for "Horizontal Lander".[6]
Vertical takeoff and landing
Different terms are used for takeoff and landing depending on the source of thrust used. VTVL uses rockets, whereas VTOL uses air, propelled via some kind of rotor system.
Aircraft (VTOL)
Vertical Take-Off and Landing (VTOL) aircraft includes fixed-wing aircraft that can hover, take off and land vertically as well as helicopters and other aircraft with powered rotors, such as tiltrotors.[7][8][9][10] The terminology for spacecraft and rockets is VTVL (vertical takeoff with vertical landing).[11] Some VTOL aircraft can operate in other modes as well, such as CTOL (conventional take-off and landing), STOL (short take-off and landing), and/or STOVL (short take-off and vertical landing). Others, such as some helicopters, can only operate by VTOL, due to the aircraft lacking landing gear that can handle horizontal motion. VTOL is a subset of V/STOL (vertical and/or short take-off and landing).
Besides the ubiquitous helicopter, there are currently two types of VTOL aircraft in military service: craft using a
Rocket (VTVL)
Vertical takeoff, vertical landing (VTVL) is a form of takeoff and landing for rockets. Multiple VTVL craft have flown. The most widely known and commercially successful VTVL rocket is SpaceX's Falcon 9 first stage.
VTVL technologies were developed substantially with small rockets after 2000, in part due to
Vertical takeoff and horizontal landing
Aircraft (VTOHL)
In aviation the term VTOHL ("Vertical Take-Off and Horizontal Landing") as well as several VTOHL aviation-specific subtypes: VTOCL, VTOSL, VTOBAR exist.
Zero length launch system
The zero length launch system or zero length take-off system (ZLL, ZLTO, ZEL, ZELL) was a system whereby
Spacecraft (VTHL)
Vertical takeoff, horizontal landing (VTHL) is the mode of operation for all current and formerly operational orbital
There have been several VTHL proposals that never flew, including the circa-1960
As of March 2011[update], two VTHL
In 2017 DARPA selected a VTHL design for XS-1.
Horizontal takeoff and vertical landing
Few airplanes can operate with conventional takeoff and vertical landing (and its subtypes STOVL, CATOVL) as the F-35B.
Horizontal takeoff and vertical landing (HTVL) in spaceflight has not been used, but has been proposed for some systems that use a two-stage to orbit launch system with a plane based first stage, and a capsule return vehicle. One of the few HTVL concept vehicles is the 1960s concept spacecraft
Multi-mode configurations
Vehicles use more than one mode also exist.
Vertical/Short takeoff landing (V/STOL)
Vertical and/or short take-off and landing (V/STOL) aircraft that are able to take off or land vertically or on short runways. Vertical takeoff and landing (VTOL) includes craft that do not require runways at all. Generally, a V/STOL aircraft needs to be able to hover; helicopters are not typically considered under the V/STOL classification.
A rolling takeoff, sometimes with a ramp (
V/STOL was developed to allow fast jets to be operated from clearings in forests, from very short runways, and from small aircraft carriers that would previously only have been able to carry helicopters.
The main advantage of V/STOL aircraft is closer basing to the enemy, which reduces response time and tanker support requirements. In the case of the Falklands War, it also permitted high performance fighter air cover and ground attack without a large aircraft carrier equipped with a catapult.
The latest V/STOL aircraft is the
References
- ^ a b Campbell, John P. "Overview of Powered Lift Technology", George Washington University.
- ^
Messier, Doug (2011-02-23). "Lynx Development Proceeds Towards First Test Flight". Parabolic Arc. Retrieved 2011-02-28.
work is coming along nicely on building the first test flight vehicle which the company hopes to fly by the end of the year.
- ^ Foust, Jeff (2017-11-15). "XCOR Aerospace Files for Bankruptcy". Space.com. Retrieved 2019-08-28.
- ^ "Skylon FAQ". Frequently Asked Questions. Reaction Engines Limited. 2010. Archived from the original on 2015-06-02. Retrieved 2011-02-06.
- ^ "sRLV platforms compared". NASA. 2011-03-07. Archived from the original on 2021-02-20. Retrieved 2011-03-10.
Lynx: Type: HTHL / Piloted ... SpaceShipTwo: Type: HTHL / Piloted
- ^ HL-10 Lifting Body Fact Sheet, NASA, 2009-12-03, accessed 2011-02-16.
- ^ "Vertical Takeoff & Landing Aircraft," John P. Campbell, The MacMillan Company, New York, 1962.
- ^ Rogers 1989.
- ^ Laskowitz, I.B. "Vertical Take-Off and Landing (VTOL) Aircraft." Annals of the New York Academy of Sciences, Vol. 107, Art.1, 25 March 1963.
- ^ "Straight Up - A History of Vertical Flight," Steve Markman and Bill Holder, Schiffer Publishing, 2000.
- ^ "Masten Space Systems Achieves First-Ever VTVL Midair Engine Relight Milestone on Path to Space." SpaceRef.com, 29 May 2010. Retrieved: 10 July 2011.
- ^ "AIAA 2003-09-09 Flight mechanics of manned Sub-Orbital Reusable Launch Vehicles with Recommendations for Launch and Recovery-M Sarigul-Klijn & N Sarigul-Klijn" (PDF).
- ^ "Orbital may wind down its commercial crew effort". NewSpace Journal. 2011-04-22. Retrieved 2011-04-25.
CEO Dave Thompson said ... "I don't, at this time, anticipate that we'll continue to pursue our own project in that race. We'll watch it and if an opportunity develops we may reconsider. But at this point, I would not anticipate a lot of activity on our part in the commercial crew market."
- ^ "Liquid Fly-back Booster (LFBB)". DLR. Archived from the original on 10 June 2015. Retrieved 9 June 2015.
- ^ "Air Force studying reusable upper stage systems for reusable booster". RLV and Space Transport News. 2010-09-20. Archived from the original on 2011-07-24. Retrieved 2011-03-24.
- ^
Cogliano (2011-03-22). "Air Force launches $250M reusable booster initiative". Dayton Business Journal. Retrieved 2011-03-24.
Officials anticipate awarding up to three contracts for the project, where winners would compete for individual tasks of experiments and demonstrations that address technology, processes and other attributes of a reusable booster system, or RBS. Air Force officials envision an RBS that includes a reusable rocket and an expendable upper stage rocket. The reusable rocket would be launched vertically and return, landing aircraft style on a runway, after carrying the space craft to a point where the expendable rocket could take over.
- ^ Ferster, Warren (2012-10-19). "Prototype Reusable Rocket Effort Felled by U.S. Budget Woes". Space News. Retrieved 2012-10-21.
- ^
Wade, Mark. "Hyperion SSTO". Astronautix. Archived from the original on August 27, 2002. Retrieved 2011-02-06.
The 'Hyperion' vehicle was truly remarkable since it would have been launched horizontally and landed vertically (HTVL) — an extremely rare combination. The payload capability was 110 passengers or 18t of cargo.
- ^ "U.S. Marines Corps declares the F-35B operational". United States Marine Corps. 2015-07-31. Retrieved 2019-08-28.