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Re: Luftmine A (LMA) maximum dropping speed?
Both the Luftmine A and B are referred to here:
"The mines were cylindrical in shape with a hemispherical nose, and deployed under a 27ft diameter green artificial silk parachute, falling at about 40mph. They were fitted with magnetic firing and later with acoustic or magnetic/acoustic firing. When the mine hit the water and sank to more that 8ft, hydrostatic pressure and the disolution of a soluble plug actuated the magnetic device and the mine became operational against shipping. The mine was also armed with a clockwork bomb fuze which caused the bomb to explode when used against land targets, and this was started by the impact of hitting the ground. The mine was timed to detonate 25 seconds after the fuze had started. When deployed at sea, the time fuze did not operate as a diaphragm stopped the clockwork when under the pressure of 7 feet of water or more."
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