VTOL, STOL, CTOL, STOVL
A vertical
take-off and landing (VTOL)
aircraft is one that can hover, take off, and land vertically.
This classification can include a variety of types of aircraft including fixed-wing aircraft
as well as helicopters
and other aircraft with powered rotors, such as cyclogyros/cyclocopters and tiltrotors. 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 tiltrotor, such as the Bell Boeing V-22 Osprey,
and another using directed jet thrust, such as the Harrier family and new F-35B Lightning II
Joint strike Fighter (JSF). In the civilian sector currently only helicopters
are in general use (some other types of commercial VTOL aircraft have been
proposed and are under development as of 2017). Generally speaking, VTOL
aircraft capable of STOVL use it wherever possible, since it typically
significantly increases takeoff weight, range or payload compared to pure VTOL.
Harrier Jump Jet,
is a family of jet-powered attack aircraft capable of vertical/short takeoff and landing
operations (V/STOL). Originally developed by UK manufacturer Hawker Siddeley in the 1960s,
the Harrier emerged as the only truly successful V/STOL design of the many
attempted during that era, despite being a subsonic aircraft, unlike most
of its competitors. It was conceived to operate from improvised bases, such as
car parks or forest clearings, without requiring large and vulnerable air bases. Later, the design was adapted for use from aircraft carriers
Marines are different kind of breed. During
its heydays with the US Marine Corps, Harriers had been the main stay of close
air support during beachhead landings. Its treasured by Marine Coprs and its
driven by US Marine Lt GEN rank
The
Hawker Siddeley Harrier is the first generation-version and is also known as
the AV-8A Harrier; it was used by multiple air forces, including the Royal Air Force (RAF) and the United States Marine Corps (USMC). The Sea Harrier is a naval strike/air defence fighter derived from the Hawker Siddeley
Harrier; it was operated by both the Royal Navy and the Indian
Navy. During the
1980s, a second generation Harrier emerged; manufactured in the United States
as the AV-8B and in Britain as the British Aerospace Harrier II respectively.
By the start of the 21st century, the majority of the first generation Harriers
had been withdrawn, many operators having chosen to procure the second
generation as a replacement. In the long term, several operators have announced
their intention to supplement or replace their Harrier fleets with the STOVL variant of the F-35 Lightning II, designated as the F-35B
As
of June 2015, the STOVL variant of the F-35 Lightning II (formerly the Joint Strike Fighter),
designated as the F-35B, is intended to replace the AV-8B Harrier II in service
with the US Marine Corps while the RAF and Royal Navy are scheduled to introduce the
F-35B in 2016 with their first F35 unit, 617 Squadron and the Italian Navy in 2018–2019
During
2010, it was announced that the RAF and RN would retire their remaining
Harriers by 2011, and in December 2010 the RAF's Harrier GR9s made
their last operational flights. In June 2011, the MoD denied press
reports that the aircraft were to be sold to the US Marine Corps for spares to support their AV-8B fleet. However, at the
end of November 2011, the Defence Minister Peter Luff announced the sale of the final 72
Harriers to the US Marine Corps. As many as possible of the 72
Harrier GR9s will be converted to match AV-8B Night Attack configuration
to augment the total AV-8B end strength (this will allow the USMC to retire some
high-flight-hour F/A-18D aircraft), while the remaining aircraft will be used as spare parts
sources for the airworthy fleet
During
the first half of 2016, the Indian
Navy retired the
last of their remaining 11 Sea Harriers, which had been operating from the INS Viraat
(formerly the HMS Hermes), in favour of the conventional Mikoyan MiG-29K
STOL
is an acronym for a short takeoff and
landing aircraft
with short runway
requirements for takeoff and landing.
Many STOL-designed aircraft also feature various arrangements for use on runways with harsh conditions (such as 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 or aircraft carriers’ short runways
Have you ever seen aircraft moving forward and back in air and
land?
F35 lightning II are doing STOVL and
V22 Ospreys are doing VTOL plus V22 Ospreys can back up in the air on their
own. C130 Hercules also can back it up on their own on the ground.
I am obligated to write up about F-22 Raptors which was
manufactured in South Korea by Lockheed Martin and ROK Aerospace Engineers
during 1990s
The
F-22 Raptor defines air dominance. The 5th Generation F-22’s unique combination
of stealth, speed, agility, and situational awareness, combined with lethal
long-range air-to-air and air-to-ground weaponry, makes it the best air
dominance fighter in the world.
F-22
Raptor has delivered on its promise to provide unprecedented air dominance. The
F-22 has demonstrated precision attack capabilities, defeating both air- and
ground-based threats with unparalleled lethality and survivability.
The
F-22’s ability to collect and share tactical information with friendly assets
enables U.S. and allied forces to engage targets with unmatched battle space
awareness. The Raptor makes other coalition aircraft more survivable.
The
F-22 is the world’s most dominant fighter, but potential adversaries continue
to develop capabilities intended to challenge the ability of U.S. and allied
air forces to gain and maintain air superiority. With that in mind, Lockheed
Martin is dedicated to working with the U.S. Air Force on a robust F-22 combat
enhancement program to bolster the Raptor’s asymmetric advantage over current
and potential adversaries. The capabilities of the F-22 Raptor remain essential
to deter and defeat threats and ensure regional and global security well into
the future.
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