The Sikorsky Cypher and Cypher II are types of
unmanned aerial vehicle
An unmanned aerial vehicle (UAV) or unmanned aircraft system (UAS), commonly known as a drone, is an aircraft with no human pilot, crew, or passengers onboard, but rather is controlled remotely or is autonomous.De Gruyter Handbook of Dron ...
s developed by
Sikorsky Aircraft
Sikorsky Aircraft is an American aircraft manufacturer based in Stratford, Connecticut. It was established by the Russian-American aviation pioneer Igor Sikorsky in 1923, and was among the first companies to manufacture helicopters for civilian ...
. They are
vertical takeoff and landing
A vertical take-off and landing (VTOL) aircraft is one that can take off and land vertically without relying on a runway. This classification can include a variety of types of aircraft including helicopters as well as thrust-vectoring fixed-wing ...
aircraft
An aircraft ( aircraft) is a vehicle that is able to flight, fly by gaining support from the Atmosphere of Earth, air. It counters the force of gravity by using either Buoyancy, static lift or the Lift (force), dynamic lift of an airfoil, or, i ...
which use two opposing
rotor
ROTOR was an elaborate air defence radar system built by the British Government in the early 1950s to counter possible attack by Soviet bombers. To get it operational as quickly as possible, it was initially made up primarily of WWII-era syst ...
s enclosed in a
circular shroud for propulsion.
Design and development
Cypher
In the late 1980s, Sikorsky Aircraft flew a small UAV named "Cypher", with coaxial rotors inside a
torus
In geometry, a torus (: tori or toruses) is a surface of revolution generated by revolving a circle in three-dimensional space one full revolution about an axis that is coplanarity, coplanar with the circle. The main types of toruses inclu ...
-shaped airframe. The torus shroud improved handling safety and helped increase lift. The first proof-of-concept Cypher was 1.75 meters (5.75 feet) in diameter and 55 centimeters (1.8 feet) tall, weighed 20 kilograms (43 pounds), and was first flown in the summer of 1988. This design was powered by a four-stroke, 2.85 kW (3.8 hp) engine and was mounted on a truck for forward-flight tests.
It led to a true flight prototype Cypher that weighed 110 kilograms (240 pounds), had a diameter of 1.9 meters (6.2 feet) and was powered by a compact, 40 kW (53 hp)
Wankel engine
The Wankel engine (, ) is a type of internal combustion engine using an eccentric (mechanism), eccentric Pistonless rotary engine, rotary design to convert pressure into rotating motion. The concept was proven by German engineer Felix Wankel, f ...
. After an initial free flight in 1993, the Cypher prototype was used in flight tests and demonstrations through most of the 1990s, ultimately leading to a next-generation design, the Cypher II, which was a competitor in the
United States Navy
The United States Navy (USN) is the naval warfare, maritime military branch, service branch of the United States Department of Defense. It is the world's most powerful navy with the largest Displacement (ship), displacement, at 4.5 millio ...
VT-UAV competition.
The single prototype first flew in April
1992
1992 was designated as International Space Year by the United Nations.
Events January
* January 1 – Boutros Boutros-Ghali of Egypt replaces Javier Pérez de Cuéllar of Peru as United Nations Secretary-General.
* January 6
** The Republ ...
and flew untethered in 1993. Since then, over 550 demonstration flights have been made for the US government.
The Cypher can carry a sensor package on struts above its hull, or can transport loads weighing up to 50 lb (23 kg).
Cypher II
Two Cypher II prototypes have been built for the
US Marine Corps
The United States Marine Corps (USMC), also referred to as the United States Marines or simply the Marines, is the Marines, maritime land force service branch of the United States Department of Defense. It is responsible for conducting expedi ...
, which calls it "Dragon Warrior". The Cypher II is similar in size to its predecessor, but has a pusher propeller in addition to its rotor and can be fitted with wings for long-range reconnaissance missions. In its winged configuration, the Cypher II has a range of over 185 kilometers (115 miles) and a top speed of 230 km/h (145 mph). It is unclear if the Cypher will enter production.
Specifications (Cypher)
See also
References
This article contains material that originally came from the web article by Greg Goebel, which exists in the Public Domain.
External links
Cypher
{{Sikorsky Aircraft
Flying saucers
United States military helicopters
Cypher
Cypher may refer to:
Arts and entertainment
* Cypher (French Group), a Goa trance music group
* Cypher (band), an Australian instrumental band
* ''Cypher'' (film), a 2002 film
* ''Cypher'' (...And Oceans album)
* ''Cypher'' (Spektr album)
* C ...
1990s United States military reconnaissance aircraft
Unmanned aerial vehicles of the United States
Wankel-engined helicopters
Aircraft first flown in 1988
Unmanned helicopters