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51MH-6 Little Bird — Infobox Aircraft name= MH 6/AH 6 Little Bird caption= AH 6 Little Bird helicopter type= Light observation helicopter manufacturer= MD Helicopters designer= first flight= introduced= retired= status= Active service primary user= United States Army …
52Sikorsky S-62 — Infobox Aircraft name= S 62 / HH 52A Seaguard caption= A USCG HH 52A Seaguard landing on an icebreaker type= SAR/utility helicopter manufacturer= Sikorsky Aircraft designer= first flight= 1959 introduced= 1961 retired= status= primary user=… …
53Rolls-Royce R — The Rolls Royce R was a racing aero engine. Developed from the Buzzard it was a 36.7 litre V12. There were 19 made between 1929 and 1934. It was capable of producing over convert|2500|hp|abbr=on and weighed 774 kg. It was used for Schneider… …
54Vauxhall Prince Henry — The Vauxhall Prince Henry was a car manufactured by Vauxhall Motors from 1911 to 1913. It had a length of convert|4.05|m|in|1 and a weight of Auto kg|1250|0.Officially classed as the C type, the name Prince Henry was introduced after three cars… …
55AH-56 Cheyenne — Infobox Aircraft name= AH 56 Cheyenne caption= AH 56 Cheyenne during testing type= Attack helicopter manufacturer= Lockheed designer= first flight= 21 September 1967 introduced= retired= status= Canceled primary user= more users= produced= number …
56Eurocopter Ecureuil — Infobox Aircraft name = AS 350 Ecureuil/AStar AS 355 Ecureuil 2/TwinStar caption = An AS350 B2 type = Light utility manufacturer = Aérospatiale Eurocopter Group designer = first flight = 26 June 1974 introduced = 1975 retired = status = primary… …
57Phase fired controllers — Phase control (PFC), also called phase cutting, is a method of pulse width modulation (PWM) for power limiting, applied to AC voltages. It works by modulating a thyristor, SCR, triac, thyratron, or other such gated diode like devices into and out …
58MLW RSC-24 — The MLW RSC 24 was a type of diesel electric locomotive built by Montreal Locomotive Works for use on Canadian National Railway (CN).Only 4 RSC 24 s were built all in 1959 and were numbered 1800 1803 by CN. The locomotives were conceived by MLW… …
59FM P-12-42 — Infobox Locomotive name=FM P 12 42 powertype=Diesel electric gauge=4 ft 8½ in (1435 mm) caption=An FM P 12 42, Boston and Maine Railroad #1. builder=St. Louis Car Company aarwheels=B 2 cylindercount=8, Opposed piston primemover= builddate=1957… …
60Rotary phase converter — DefinitionA rotary phase converter, abbreviated RPC, is a Rotary converter that produces Three phase electric power from Single phase electric power. This allows three phase loads to run using generator or utility supplied single phase electric… …
