RSD most often refers to:
RSD may also refer to:
The ALCO RSD-15 was a diesel-electric locomotive of the road switcher type built by ALCO (the American Locomotive Company) of Schenectady, New York between August 1956 and June 1960, during which time 75 locomotives were produced. The RSD-15 was powered by an ALCO 251 16-cylinder four-cycle V-type prime mover rated at 2,400 horsepower (1.79 MW); it superseded the almost identical ALCO 244-engined RSD-7, and was catalogued alongside the similar but smaller 1,800 hp (1.34 MW) RSD-12, powered by a 12-cylinder 251-model V-type diesel engine.
The locomotive rode on a pair of three-axle Trimount trucks, in an AAR C-C wheel arrangement, with all axles powered by General Electric model 752 traction motors. These trucks have an asymmetrical axle spacing because of the positioning of the traction motors. The six-motor design allowed higher tractive effort at lower speeds than an otherwise similar four-motor design.
The RSD-15 could be ordered with either a high or low short hood; railfans dubbed the low short hood version "Alligators", on account of their unusually long low noses.
The RSD 58 is an early production surface-to-air missile system developed by Rheinmetall Air Defence in Switzerland from 1947. Test firings were first made in 1950 with production starting in 1952 for the armed forces of Japan. Test firings were also made in Switzerland and Italy. On the basis of the RSA Missile, the beacon controlled missile system RSC / D was developed. There was no significant order, except for the delivery of a training battery to Japan and thus no larger order. The system consists of double start carriage, beacon, search radar, command station and diesel generator. All five components are each constructed on a single-axle trailer apart from the diesel generator that was built on a two-axle trailer. The two hydraulic elevator bars throw on / trolley enabled a self-assemble with rocket was thus no additional crane / loading vehicle necessary. The system RSC / D in 1960 was the basis of the developed under the code names Kriens RSC Missile system, which was completed in 1966 by EMD. The Air Force used instead the British Bloodhound system. A double carriage start of the RSC / D with 2 missiles and a beacon is now at the Full Military Museum. Start a double mount with 2 missile system RSD Kriens is now at the Aviation Museum in Dübendorf.