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Description
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With this simple setup, consisting of a modified bike-pump with integrated one-way valve
and a 50 cm barrel (6 mm bore), plastic bullets (0.13 g) can be accelerated to 135 m/s
(1.2 J) and steel bullets (0.89 g) to 90 m/s (3.6 J)
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http://photos.forlix.org/devices/20110715165620/
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