This is one of the 20mm Cannon Shells fired by Mosquito II DD612, flown by my father (Group Captain R G Slade) on the night of 22-8-1942. My father and his navigator shot down a Dornier 217 E-4 U5 ...

Instead, the Air Force provided the smaller 20mm M61 Vulcan cannon that was in widespread use for the head-to-head trials, which the Fairchild Republic design ultimately won. So, Northrop’s Y-A ...

Three of its four aspherical lenses are made of low-dispersion glass elements — specifically, 2 ELD (extraordinary low dispersion) lenses and 1 SLD (special low dispersion) lens.Its minimum focus ...

Three of its four aspherical lenses are made of low-dispersion glass elements — specifically, 2 ELD (extraordinary low dispersion) lenses and 1 SLD (special low dispersion) lens.Its minimum focus ...

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