XASM-N-6 Omar | |
---|---|
Type | Air-to-surface missile |
Place of origin | United States |
Service history | |
Used by | United States Navy |
Production history | |
Designed | 1951 |
Manufacturer | Eastman Kodak |
Specifications | |
Weight | <100 pounds (45 kg) |
Length | <10 feet (3.0 m) |
Diameter | 5 inches (130 mm) |
Guidance system | Optical beam riding |
References | Ordway and Wakeford [1] |
The ASM-N-6 Omar was a short-range air-to-surface missile developed for and evaluated by the United States Navy in the early 1950s. Intended to use existing unguided rockets as a basis and using a novel guidance system involving optical beam-riding, the program was unable to resolve difficulties with the guidance system and was cancelled without entering service.
An air-to-surface missile (ASM) or air-to-ground missile is a missile designed to be launched from military aircraft at targets on land or sea. There are also unpowered guided glide bombs not considered missiles. The two most common propulsion systems for air-to-surface missiles are rocket motors, usually with shorter range, and slower, longer-range jet engines. Some Soviet-designed air-to-surface missiles are powered by ramjets, giving them both long range and high speed.
The United States Navy (USN) is the naval warfare service branch of the United States Armed Forces and one of the seven uniformed services of the United States. It is the largest and most capable navy in the world and it has been estimated that in terms of tonnage of its active battle fleet alone, it is larger than the next 13 navies combined, which includes 11 U.S. allies or partner nations. with the highest combined battle fleet tonnage and the world's largest aircraft carrier fleet, with eleven in service, and two new carriers under construction. With 319,421 personnel on active duty and 99,616 in the Ready Reserve, the Navy is the third largest of the service branches. It has 282 deployable combat vessels and more than 3,700 operational aircraft as of March 2018, making it the second largest and second most powerful air force in the world.
Designed by Eastman Kodak in response to an urgent requirement by the U.S. Navy for a stand-off air-to-ground weapon for use in the Korean War, [2] the Omar, designated XASM-N-6, [1] was authorized for development on 20 August 1951. [2] Based on the airframe of the standard High Velocity Aircraft Rocket, [2] cruciform fins were mounted at the mid and aft portions of the rocket body to provide stabilization and control. [3] An optical beam riding guidance system was developed for use with Omar; the launching aircraft would project an intense beam of light at the target, and aft-facing sensors on the missile would track the light source, keeping the missile on course to its target. [2] The Omar shared some parts of its control system with the AAM-N-7 Sidewinder air-to-air missile. [3]
The Korean War was a war between North Korea and South Korea. The war began on 25 June 1950 when North Korea invaded South Korea following a series of clashes along the border.
The High Velocity Aircraft Rocket, or HVAR, also known by the nickname Holy Moses, was an American unguided rocket developed during World War II to attack targets on the ground from aircraft. It saw extensive use during both World War II and the Korean War.
Cruciform means having the shape of a cross or Christian cross.
Test launches of Omar began in late 1951; testing showed that the guidance system failed to prove as effective as had been expected. [3] Issues were found with the beam of light "spreading" as it covered the distance to the target, and the issue of the launching aircraft having to remain on course to the target, a common issue with early guided missiles, could not be solved; in mid-1952 the program was cancelled, funding being redirected to the Sidewinder program. [4] The following year a modification of the seeker head, nicknamed "Ramo" (for 'reverse Omar') was tested, evaluating a frequency modulation system to encode the light beam to refine the guidance. This proved no more effective, and the system was cancelled entirely, although some details of the frequency encoding were used in the development of the SAM-N-7 Terrier program. [4]
In telecommunications and signal processing, frequency modulation (FM) is the encoding of information in a carrier wave by varying the instantaneous frequency of the wave.
The Gorgon missile family was a series of experimental air-to-air, air-to-surface, and surface-to-surface missiles developed by the United States Navy's Naval Aircraft Modification Unit between 1943 and 1953. The immaturity of the technology involved meant that none of the Gorgon missiles achieved operational service, however they were extensively used in the development of guided missile controls and guidance technologies.
Project Kingfisher was a weapons-development program initiated by the United States Navy during the latter part of World War II. Intended to provide aircraft and surface ships with the ability to deliver torpedoes to targets from outside the range of defensive armament, six different missile concepts were developed; four were selected for full development programs, but only one reached operational service.
The VB-6 Felix was a precision-guided munition developed by the United States during World War II.
The LBD-1 Gargoyle was an American air-to-surface missile developed during World War II by McDonnell Aircraft for the United States Navy. One of the precursors of modern anti-ship missiles, it was extensively used as a test vehicle during the late 1940s.
The Hopi was an air-to-surface missile developed by the United States Navy's Naval Ordnance Test Station. Intended to provide a medium-range nuclear capability for carrier aircraft, the missile reached the flight test stage during 1958, but the project was cancelled following testing and no production was undertaken.
The Gimlet was an unguided air-to-air and air-to-surface rocket developed by the United States Navy during the early 1950s. Although it proved successful in testing and was ordered into large-scale production, the arrival of the guided missile as a practical and reliable weapon resulted in the cancellation of the Gimlet rocket in 1957.
The Diamondback was a proposed nuclear-armed air-to-air missile studied by the United States Navy's Naval Ordnance Test Station during the 1950s. Intended as an enlarged, nuclear-armed version of the successful Sidewinder missile, Diamondback did not progress beyond the study stage.
The Pratt-Read LBE-1 was a prototype glide bomb, or "Glomb", developed for the United States Navy during World War II. Although there were high hopes for the concept, the limitations of the Glomb led to the production contract for the LBE-1 being reduced, then cancelled, and only four examples of the type were ever built.
Glomb, from "glide bomb", was a project undertaken by the United States Navy during World War II to develop an unmanned aircraft for delivering bombs to high-value, well-protected targets without risk to aircrew. The project proceeded through the war, producing several prototype aircraft, but technical limitations meant no Glombs saw operational service and the program was cancelled at the end of the war.
The ASM-N-5 Gorgon V was an unpowered air-to-surface missile, developed by the Glenn L. Martin Company during the early 1950s for use by the United States Navy as a chemical weapon delivery vehicle. Developed from the earlier PTV-N-2 Gorgon IV test vehicle, the program was cancelled without any Gorgon Vs seeing service.
The AAM-N-5 Meteor was an early American air-to-air missile, developed by the Massachusetts Institute of Technology and Bell Aircraft for the United States Navy. Designed for launch from carrier-based aircraft, the program proceeded to the flight testing stage before being cancelled.
The Naval Aircraft Modification Unit KDN Gorgon, originally designated TD2N, was an early jet-powered target drone developed by the Bureau of Aeronautics and constructed by the Naval Aircraft Modification Unit for use by the United States Navy. First flown near the end of World War II, it was cancelled due to problems with its engine in 1946.
The PTV-N-2 Gorgon IV was a ramjet-powered missile developed by the Glenn L. Martin Company for the United States Navy. Originally intended as an air-to-surface weapon, it materialized as a propulsion test vehicle, and between 1947 and 1950 was used for test purposes and, as the KDM Plover, as a target drone.
The CTV-N-2 Gorgon IIC – also designated KGN, KUN, and CTV-2 – was an experimental drone, originally intended as a surface-to-surface missile, developed by the United States Navy near the end of World War II. It was used to test control and homing systems for guided missiles, and was also produced in small numbers as a target drone under the designations TD3N and KD2N.
The KA2N Gorgon IIA – also designated KU2N, CTV-4, and CTV-N-4 – was an air-to-air missile developed by the United States Navy near the end of World War II. Proving a failure in its designed role, it was repurposed as an experimental testbed for missile technology.
The Gorgon III – given the military designations KA3N, KU3N, CTV-N-6 and RTV-N-4 – was a rocket-powered air-to-air missile developed by the United States Navy near the end of World War II. With the end of the war, the program was changed to that of a research vehicle for missile control systems; both single and twin-rocket-powered versions were built and tested.
The TDU-12/B Skydart was an unguided target rocket built by Curtiss-Wright for use by the United States Air Force. It was used operationally from the late 1950s to the mid 1960s.
The AUM-N-4 Diver, also known as Kingfisher D and AUM-4, was a proposed anti-ship and anti-submarine missile, developed for use by the United States Navy in the late 1940s. It was intended to carry a rocket-propelled torpedo that used a single rocket motor for both airborne and underwater propulsion; due to technical issues encountered in the development of the torpedo, no missiles were built before the program was cancelled.
The AUM-N-6 Puffin, also known as Kingfisher F and AUM-6, was an anti-ship and anti-submarine missile developed for use by the United States Navy in the late 1940s. Pulsejet-powered and intended to allow an aircraft to launch a torpedo or bomb from stand-off range, it was flight-tested but failed to enter operational service.
The SUM-N-2 Grebe, also known as Kingfisher E and SUM-2, was a rocket- and pulsejet-powered anti-ship and anti-submarine missile developed by the United States Navy in the late 1940s. Intended to allow a ship to deliver a torpedo at a significant distance from the launch location, it proved impractical in trials, and did not enter operational service.
The International Standard Book Number (ISBN) is a numeric commercial book identifier which is intended to be unique. Publishers purchase ISBNs from an affiliate of the International ISBN Agency.
Norman Friedman, Ph.D., is an American author and naval analyst. He has written over 30 books on naval matters, and appeared on television programs on PBS and the Discovery Networks.