| 词条 | BMW R51/3 | ||||||||||||||||||||||||||||||||||||||||
| 释义 |
| name = BMW R51/3 | image = R51-3-left.jpg | alt = | caption = A 1952 R51/3 – note the half-width brakes before 1954 | aka = | manufacturer = BMW | parent_company = | production = 1951-5 | assembly = | predecessor = | successor = | class = | engine = | bore_stroke = 68 mm | compression = 6.3:1 | top_speed = 140 km/h | power = 24 hp | torque = | ignition = | transmission = | frame = | suspension = | brakes = | tires = | rake_trail = | wheelbase = | length = | width = | height = | seat_height = | dry_weight = 190 kg | wet_weight = 355 kg | fuel_capacity = 17 L | oil_capacity = | fuel_consumption = | turning_radius = | related = | sp = | footnotes = }} The BMW R51/3 was BMW's second post-World War II 500 cc motorcycle, following the briefly produced R51/2. It featured a flat-twin engine and exposed drive shaft.[1] In 1951, the R51/3 succeeded and modernized the 1950 R51/2, which was essentially a pre-war design that was produced after the war. The 600 cc R67, R67/2, and R67/3 series and the more sporting R68 model also followed the R51/2. HistoryFollowing World War II, Germany was precluded from producing motorcycles of any sort by the Allies. When the ban was lifted, in Allied-controlled Western Germany, BMW had to start from scratch. There were no plans, blueprints, or schematic drawings. Company engineers had to use surviving pre-war motorcycles to create new plans. In 1948, it introduced the 250 cc R24, which was essentially a pre-war R23, complete with rigid rear end. When larger machines were permitted, BMW introduced its R51/2 in 1950, a model that was in production for only one year and that was essentially a pre-war BMW produced after the war. The R51/3 was then introduced in 1951 for a production run of four years. The 600 cc R67, sister model to the R51/3 and almost identical visually, was also introduced in 1951, but it went through two revisions. The more powerful R67/2 came out one year later and was replaced in 1955 by the R67/3, which was in production through the 1956 model year. In 1952, BMW introduced the 600 cc R68,[2] which produced {{convert|35|hp|kW|abbr=on}}, had a compression ratio of 8.0:1. Technical data
See also
References1. ^R51/3 data sheet 2. ^BMW R68 Data External links{{commons cat inline|BMW R51}}{{BMW motorcycles}}{{DEFAULTSORT:BMW R51 3}} 4 : BMW motorcycles|Motorcycles powered by flat engines|Shaft drive motorcycles|Motorcycles introduced in the 1950s |
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