rear spar frame
71PWS-51 — (SP ADC, on the right) during the Challenge 1930 Role Sports plane …
72B-1 Lancer — Infobox Aircraft name = B 1 Lancer type = Strategic bomber national origin = United States manufacturer = North American Rockwell Rockwell International Boeing caption = A B 1B Lancer in flight. designer = first flight = 23 December 1974… …
73RWD-10 — infobox Aircraft name =RWD 10 type =Aerobatics plane manufacturer =DWL caption = designer = RWD team first flight =July 1933 introduced =1935 retired =1939 status = primary user =Poland more users = produced =1937 1938 number built = 22+1 unit… …
74RWD-17 — infobox Aircraft name =RWD 17 type =Trainer aircraft manufacturer =DWL caption =RWD 17W floatplane prototype designer = RWD team first flight =7 August 1937 introduced =1938 retired =1939 status = primary user =Poland more users = Romania… …
75LET L-13 Blaník — NOTOC The L 13 Blaník is a two seater trainer glider produced by Let Kunovice since 1956. It is the most numerous and widely used glider in the world. In United States Air Force Academy service, it is designated TG 10C and is used for basic… …
76Submarine — For other uses, see Submarine (disambiguation). A Japan Maritime Self Defense Force Oyashio class submarine in 2006 A submarine is a watercraft capable of independent operation below the surface of the water. It differs from a submersible, which… …
77History of the United States Navy — United States Navy …
78Fatigue (material) — Metal fatigue redirects here. For the video game, see Metal Fatigue (disambiguation). v · d · e Materials failure modes …
79RWD-6 — infobox Aircraft name =RWD 6 type =Sports plane manufacturer =Warsaw University of Technology workshops caption =RWD 6 of Franciszek Zwirko during a short take off trial at the Challenge 1932 designer = RWD team first flight =1932 06 03… …
80RWD-14 Czapla — infobox Aircraft name =RWD 14b Czapla type =reconnaissance and liaison aircraft manufacturer =DWL, LWS caption = designer = first flight =1935 introduced =1939 retired = status = primary user =Polish Air Force more users = Romania produced =1938… …
