Hydraulic ram

1772,1796

Hydraulic ram

The book of science

Tom Sharp

John Whitehurst, Joseph-Michel Montgolfier mechanics

Hydraulic ram

Water hammer

Hydraulic thump

Joseph-Michel Montgolfier and his brother Jacques-Étienne owned a paper mill in Voiron and developed the first manned untethered flight of a hot-air balloon. The balloon was made of paper. Joseph-Michel invented the first self-acting water ram to raise water at their paper mill. Early water rams cycled every minute or so, producing a loud thump with each cycle.

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