microplastic
Well-Known Member
Cutaway model of a Czech-made LZED-1 tail fuze. The fuze is used with the BETAB-250-270-TU-RD Anti-concrete bomb. The bomb is slowed down by a parachute and has rocket acceleration for better penetration. The bomb is dropped at a height of 100 meters. The fuze is activated electrically and has a short and a long (safety) delay.
When the fuze is attached to the bomb tail, the transport lock (1) is pulled out completely and secured in the pulled state. The electrical cable is connected to the aircraft's power supply box.
When the bomb is dropped, the electrically activated charge (2) ignites a pyrotechnic delay (3), that burns out in 3.7 to 5.2 seconds. After the delay has burned out, the spring pushes the pin (4) up and releases the three locking balls (5). The activation spring(6) moves the entire inertia mechanism upwards, and the needle releases the slider (7). The slider is brought into line and locked by a spring-loaded pin (8). The fuze is armed (long delay only). If the rocket engine malfunctions, the entire inertia mechanism moves forward on impact and the needle hits the primer, which ignites the delay (9) function (9.5 – 13 seconds) with its flame.
The rocket engine ignites at a safe distance from the aircraft. Under the influence of the resulting acceleration, the sleeve (10) overcomes the resistance of the spring and moves upwards and releases the locking ball (11) and thus the opening for the short delay (12) with a burning time of 0.1 – 0–25 seconds. The sleeve is locked in the upper position by the locking ball and prevents forward movement. The fuze is now fully armed. On impact, the entire inertia mechanism moves forward, and the needle hits the primer, which ignites the short (12) and long (9) delay. The flame travels to the booster (13) and ignites the detonator (14), which ignites the warhead.
If the bomb hits at a small angle or on a side impact, the hammer (15) moves sideways and pushes the needle into the primer.
The fuze has a safety function: If the bomb falls and the fuze is mounted with a pulled transport lock (1), the hammer (14) moves sideways and pushes the upper part (16) of the inertia mechanism upwards. The two wings (17) fold out and secure the fuze. The fuze cannot be armed.
Even if the rocket engine starts before the arming is complete, the hammer moves up and the fuze is secured by the two wings.
arming time: 3.7sec – 5.2sec
short delay: 0.1sec – 0.25sec
long delay: 9.5sec - 13sec
length: 198mm
weight: 1,85kg
When the fuze is attached to the bomb tail, the transport lock (1) is pulled out completely and secured in the pulled state. The electrical cable is connected to the aircraft's power supply box.
When the bomb is dropped, the electrically activated charge (2) ignites a pyrotechnic delay (3), that burns out in 3.7 to 5.2 seconds. After the delay has burned out, the spring pushes the pin (4) up and releases the three locking balls (5). The activation spring(6) moves the entire inertia mechanism upwards, and the needle releases the slider (7). The slider is brought into line and locked by a spring-loaded pin (8). The fuze is armed (long delay only). If the rocket engine malfunctions, the entire inertia mechanism moves forward on impact and the needle hits the primer, which ignites the delay (9) function (9.5 – 13 seconds) with its flame.
The rocket engine ignites at a safe distance from the aircraft. Under the influence of the resulting acceleration, the sleeve (10) overcomes the resistance of the spring and moves upwards and releases the locking ball (11) and thus the opening for the short delay (12) with a burning time of 0.1 – 0–25 seconds. The sleeve is locked in the upper position by the locking ball and prevents forward movement. The fuze is now fully armed. On impact, the entire inertia mechanism moves forward, and the needle hits the primer, which ignites the short (12) and long (9) delay. The flame travels to the booster (13) and ignites the detonator (14), which ignites the warhead.
If the bomb hits at a small angle or on a side impact, the hammer (15) moves sideways and pushes the needle into the primer.
The fuze has a safety function: If the bomb falls and the fuze is mounted with a pulled transport lock (1), the hammer (14) moves sideways and pushes the upper part (16) of the inertia mechanism upwards. The two wings (17) fold out and secure the fuze. The fuze cannot be armed.
Even if the rocket engine starts before the arming is complete, the hammer moves up and the fuze is secured by the two wings.
arming time: 3.7sec – 5.2sec
short delay: 0.1sec – 0.25sec
long delay: 9.5sec - 13sec
length: 198mm
weight: 1,85kg
