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RAF aircrew with one of their Bristol Beaufighters on a PSP airstrip at Biferno, Italy, August 1944. Marston Mat, more properly called pierced (or perforated) steel planking (PSP), is standardized, perforated steel matting material developed by the United States at the Waterways Experiment Station shortly before World War II, primarily for the rapid construction of temporary runways and ...
This type of mesh is a square grid of uniformly placed wires, welded at all intersections, and meeting the requirements of ASTM A185 and A497 or other standards. [1] The sizes are specified by combining the spacing, in inches or mm, and the wire cross section area in hundredths of square inches or mm2.
The wing root fairing of an American Aviation AA-1 Yankee. An aircraft fairing is a structure whose primary function is to produce a smooth outline and reduce drag. [1]These structures are covers for gaps and spaces between parts of an aircraft to reduce form drag and interference drag, and to improve appearance.
Curtiss HS 1917 patrol flying boat, about 1,178 built; Grigorovich M-15 1917 patrol flying boat, unk no. built; Macchi M.5 1917, flying boat fighter, 244 built; Norman Thompson N.T.2B 1917 flying boat trainer, 100+ built; Tellier T.3 and Tc.6 1917 patrol flying boat, about 155 built; Hansa-Brandenburg W.20 1918 U-boat flying boat, 3 built
Of all the early operators of military aircraft, Germany was unusual in not using circular roundels. After evaluating several possible markings, including a black, red, and white checkerboard, a similarly coloured roundel, and black stripes, it chose a black 'iron cross' on a square white field, as it was already in use on various flags, and reflected Germany's heritage as the Holy Roman Empire.
Following the end of World War II, Dr. Sighard F. Hoerner was a pioneer researcher in the field, having written a technical paper published in 1952 [7] that called for drooped wingtips whose pointed rear tips focused the resulting wingtip vortex away from the upper wing surface. Drooped wingtips are often called "Hoerner tips" in his honor.
A light blue-grey working uniform, consisting of a shirt and pants whose cut followed that of the earlier M1945 tropical dress, was also adopted for all-ranks [97] though AVRK ground personnel in the field often wore the standard ARK French all-arms M1947 drab green fatigues (Treillis de combat Mle 1947).
Fifty-five examples flying by 2011. [1] [2] [5] Horizon 2 Two-seat tandem high-wing STOL aircraft with a rear window, slotted flaps and ailerons and rounded tail. Standard empty weight is 570 lb (259 kg) when equipped with an 85 hp (63 kW) Limbach Flugmotoren engine and it has a gross weight of 1,050 lb (476 kg). Forty examples flying by 2011.