Ordnance – Bomb – flare and signal dropping – Bomb displaced from exterior of plane
Patent
1982-11-10
1985-06-04
Brown, David H.
Ordnance
Bomb, flare and signal dropping
Bomb displaced from exterior of plane
244137R, F41F 502, B64D 104
Patent
active
045207119
DESCRIPTION:
BRIEF SUMMARY
This invention relates to devices used to control the operation of bomb fuses to provide for armed or safe release.
Bombs are carried on aircraft by being engaged on carriers which have hook means adapted to engage appropriate sockets on the bombs to lock the bombs in position during flight but allowing the bombs to be released by actuation of the hook means at the appropriate time.
To arm such bombs the arming mechanism in the bomb is connected by means of a lanyard to an attachment on the aircraft which is adapted to engage a loop on the end of the lanyard when the bomb is loaded, the loop being pushed between a pair of pin members, the one being a release control pin moved into a locking position in relation to an eject pin by a push rod which is actuated by the hooks which hold the bomb, the eject pin being spring-loaded into its holding position and having adjacent it an eject member surrounding the eject pin, which eject member is loaded so that while the eject member can be pushed back to allow the loop on the end of the lanyard to be engaged behind the junction of the release control pin and the eject pin, when the release control pin is withdrawn the eject member moves down to ensure that the loop is forced from the eject pin for safe release.
The sequence of operation is that when the bomb is placed in position in the carrier and the hooks are engaged to hold the bomb, a push rod moves the release control pin, which is spring-loaded, into its protruding position against pressure of the spring and into engagement with the eject pin which is disposed at right angles to the release control pin to form the space into which the loop can be pushed by displacing the eject pin and the eject member against their spring-loading.
When the bomb is released, the push rod is free to move back and the release control pin will be withdrawn by spring tension and the loop will be forced from the eject pin by the spring-loaded eject member so that during the initial movement of the hooks which hold the bomb the safe release occurs of the lanyard.
If however arming is to take place a solenoid surrounding the release control pin is energised and the release control pin is firmly held against displacement so that when the hooks start to move to release the push rod, while the push rod is free to move back, the release control pin cannot do so and the loop is firmly held to cause the pull on the lanyard to arm the bomb, the lanyard having a weak link device in it adjacent to the loop, or forming part of the loop, so that after arming the bomb the weak link breaks away from the loop and the lanyard falls with the bomb.
This however leaves the loop and the upper part of the weak link dangling from the device together with, in some cases, a short length of main lanyard depending on the position of the weak link. With this type of mechanism a problem can occur in high speed aircraft such as the F-111 where the power energising the solenoid must be switched off before the landing wheels can be lowered and when the power is switched off the release control pin will be automatically withdrawn by its spring-loading because the push rod is not now engaging the hook mechanism in the bomb carrier and release of the loop and the attached piece of lanyard with at least part of the weak link on it can cause serious damage to the aircraft because of the high speeds of travel involved, and it is desirable therefore to prevent this release when the power is cut from the electromagnet.
The object of this invention is to so modify the mechanism that in spite of the power being cut, the loop and its attachments will remain firmly locked by the release control pin and the eject pin.
The object is achieved by a telescopic push rod disposed between an arming plunger and the hooks so arranged that when a bomb is released by hook movement during an arming action at which the solenoid remains energised the release control pin is locked in its loop-holding position even when the solenoid is subsequently de-energised.
In order however that the na
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Brown David H.
The Commonwealth of Australia
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