Glide bomb: Difference between revisions

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Dropped from aircraft and [[unmanned aerial vehicle]]s, a '''glide bomb''' has wings or other aerodynamic surfaces that provide lift, so that its range is extended and its trajectory is not affected only by gravity, wind, and air resistance. Practical variants are electronically [[guided bomb|guided]] and may be [[precision-guided munition]]s.
Dropped from aircraft and unmanned aerial vehicles, a '''glide bomb''' has wings or other aerodynamic surfaces that provide lift, so that its range is extended and its trajectory is not affected only by gravity, wind, and air resistance. Practical variants are electronically guided bomb|guided and may be precision-guided munitions.


[[Image:RAZON guided bomb.jpg|left|200px|WWII RAZON guided bomb]]
Image:RAZON guided bomb.jpg|left|200px|WWII RAZON guided bomb
==Early glide bombs==
==Early glide bombs==
There were several attempts, of varying success, to use gliding bombs late in the [[Second World War]], but the available sensing and guidance technology were inadequate for effective use. Even television cameras, a reliable commodity today, could only transmit a crude picture from the nose of a bomb.  
There were several attempts, of varying success, to use gliding bombs late in the Second World War, but the available sensing and guidance technology were inadequate for effective use. Even television cameras, a reliable commodity today, could only transmit a crude picture from the nose of a bomb.  


The U.S. AZON was a conventional bomb that had been equipped with aerodynamic control surfaces, and could be steered, by radio from a human operator, left and right in [[azimuth]], hence the name.  An improved version, RAZON, could be adjusted in range (i.e., range and azimuth). Guidance and control were totally manual, based on what the weapon operator could see in the television link, and using switches to adjust fins to shift the name &mdash; it was not "flown" with a control stick as is an aircraft.<ref>{{citation
The U.S. AZON was a conventional bomb that had been equipped with aerodynamic control surfaces, and could be steered, by radio from a human operator, left and right in azimuth, hence the name.  An improved version, RAZON, could be adjusted in range (i.e., range and azimuth). Guidance and control were totally manual, based on what the weapon operator could see in the television link, and using switches to adjust fins to shift the name &mdash; it was not "flown" with a control stick as is an aircraft.<ref>{{citation
  | url = http://www.vectorsite.net/twbomb_04.html
  | url = http://www.vectorsite.net/twbomb_04.html
  | author = Greg Goebel
  | author = Greg Goebel
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One of the problems of the AZON and related weapons is that to be guided, they could not roll, as did conventional bombs. Rolling, however, stabilized the flight path, so the weapons operator both had to correct drift ''and'' aim at the target.
One of the problems of the AZON and related weapons is that to be guided, they could not roll, as did conventional bombs. Rolling, however, stabilized the flight path, so the weapons operator both had to correct drift ''and'' aim at the target.


While the German [[Fritz-X]] is often called a guided bomb, most versions seem to have been rocket-assisted and really an [[air-to-surface missile]]. It had dramatic results, sinking the Italian [[battleship]] ''Roma'' after Italy surrendered and Germany kept fighting.
While the German Fritz-X is often called a guided bomb, most versions seem to have been rocket-assisted and really an air-to-surface missile. It had dramatic results, sinking the Italian battleship ''Roma'' after Italy surrendered and Germany kept fighting.


==Current technology==
==Current technology==
Modern glide bombs vary with the need for precision delivery, and the type of payload they carry.
Modern glide bombs vary with the need for precision delivery, and the type of payload they carry.
===Point target===
===Point target===
[[Image:JSOW.jpg|thumb|350px|AGM-154 Joint Stand-Off Weapon (JSOW) moving onto the flight deck from one of the ship’s weapons elevators aboard the aircraft carrier USS ''Kitty Hawk'']]
Image:JSOW.jpg|thumb|350px|AGM-154 Joint Stand-Off Weapon (JSOW) moving onto the flight deck from one of the ship’s weapons elevators aboard the aircraft carrier USS ''Kitty Hawk''
Such weapons are simpler than powered [[air-to-surface missile]]s, although powered derivatives of some glide bombs have been developed, such as the [[AGM-154 Joint Standoff Weapon]].
Such weapons are simpler than powered air-to-surface missiles, although powered derivatives of some glide bombs have been developed, such as the AGM-154 Joint Standoff Weapon.


The current [[GBU-39 Small Diameter Bomb]] and the [[GBU-53 Small Diameter Bomb]] in development are glide bombs, In foreign military sales, their lower weight also provides greater range for the same number of bombs, considered especially important by the Israelis. <ref name=ISR-SDB>{{citation
The current GBU-39 Small Diameter Bomb and the GBU-53 Small Diameter Bomb in development are glide bombs, In foreign military sales, their lower weight also provides greater range for the same number of bombs, considered especially important by the Israelis. <ref name=ISR-SDB>{{citation
  | title = Israel’s Game Changer: GBU-39 Buster may prove highly lethal to Iran  
  | title = Israel’s Game Changer: GBU-39 Buster may prove highly lethal to Iran  
  | date = September 15, 2008
  | date = September 15, 2008

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Dropped from aircraft and unmanned aerial vehicles, a glide bomb has wings or other aerodynamic surfaces that provide lift, so that its range is extended and its trajectory is not affected only by gravity, wind, and air resistance. Practical variants are electronically guided bomb|guided and may be precision-guided munitions.

Image:RAZON guided bomb.jpg|left|200px|WWII RAZON guided bomb

Early glide bombs

There were several attempts, of varying success, to use gliding bombs late in the Second World War, but the available sensing and guidance technology were inadequate for effective use. Even television cameras, a reliable commodity today, could only transmit a crude picture from the nose of a bomb.

The U.S. AZON was a conventional bomb that had been equipped with aerodynamic control surfaces, and could be steered, by radio from a human operator, left and right in azimuth, hence the name. An improved version, RAZON, could be adjusted in range (i.e., range and azimuth). Guidance and control were totally manual, based on what the weapon operator could see in the television link, and using switches to adjust fins to shift the name — it was not "flown" with a control stick as is an aircraft.[1]

One of the problems of the AZON and related weapons is that to be guided, they could not roll, as did conventional bombs. Rolling, however, stabilized the flight path, so the weapons operator both had to correct drift and aim at the target.

While the German Fritz-X is often called a guided bomb, most versions seem to have been rocket-assisted and really an air-to-surface missile. It had dramatic results, sinking the Italian battleship Roma after Italy surrendered and Germany kept fighting.

Current technology

Modern glide bombs vary with the need for precision delivery, and the type of payload they carry.

Point target

Image:JSOW.jpg|thumb|350px|AGM-154 Joint Stand-Off Weapon (JSOW) moving onto the flight deck from one of the ship’s weapons elevators aboard the aircraft carrier USS Kitty Hawk Such weapons are simpler than powered air-to-surface missiles, although powered derivatives of some glide bombs have been developed, such as the AGM-154 Joint Standoff Weapon.

The current GBU-39 Small Diameter Bomb and the GBU-53 Small Diameter Bomb in development are glide bombs, In foreign military sales, their lower weight also provides greater range for the same number of bombs, considered especially important by the Israelis. [2]

Cluster munitions

Weapons carrying cluster munitions are area-effect and do not need extreme precision, but they need guidance when attacking targets at long range. The Wind Corrected Munitions Dispenser is one such device.

Trends

Glide bombs have usually not been as precise as missiles or gravity bombs, but this is changing with the GBU-53. Another aspect of both Small Diameter Bombs is that they are small, such that many can be released at once from an aircraft at high altitude.

References

  1. Greg Goebel, [4.0 World War II Glide Bombs (2)]
  2. Israel’s Game Changer: GBU-39 Buster may prove highly lethal to Iran, September 15, 2008