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It is an out-of-balance force on the wheel (known as overbalance [3]). It is the result of a compromise when a locomotive's wheels are unbalanced to off-set horizontal reciprocating masses, such as connecting rods and pistons, to improve the ride. The hammer blow may cause damage to the locomotive and track if the wheel/rail force is high enough.
Throws are made from a throwing circle. The thrower is not allowed to step outside the throwing circle before the hammer has landed and may only enter and exit from the rear of the throwing circle. The hammer must land within a 34.92º throwing sector that is centered on the throwing circle. The sector angle was chosen because it provides a ...
Whether slipping occurs depends on how the hammer blow compares on all the coupled wheels at the same time. Excessive hammer blow from high slipping speeds was a cause of kinked rails with new North American 4–6–4s and 4–8–4s that followed the 1934 A.A.R. recommendation to balance 40% of the reciprocating weight. [8]
James Mitchel, a weight throw medallist in 1904, won the bronze with 46.16 m given a 23 ft handicap. [5] These events are no longer considered part of the official Olympic history of the hammer throw or the athletics programme in general. Consequently, medals from these competitions have not been assigned to nations on the all-time medal tables ...
Harold Vincent "Hal" Connolly (August 1, 1931 – August 18, 2010) was an American athlete and hammer thrower from Somerville, Massachusetts. He won a gold medal in the hammer throw at the 1956 Summer Olympics in Melbourne. [1] Connolly became the first American to throw a hammer more than 200 feet. [2]
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Ivan Gubijan (14 June 1923 – 4 January 2009) was a Yugoslav hammer thrower. He competed in the 1948 and 1952 Olympics and placed second and ninth, respectively. [ 1 ] He is credited with introducing the four-turn throwing technique, which is widely used today.
Hall grew up on the family's farm in Hanson, Massachusetts, where he built up his physique using a set of weights he had constructed from concrete cylinders. [1]Hall attended Whitman High School (now part of Whitman-Hanson Regional High School), where he was a running back on the school's football team and became an active participant on the track team during his senior year.
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