They were used quite successfully on a number of merlin rockets in the late 80s. Diamond Smiles was fitted with them for adjusting the shrouds, were fitted on tracks like a number of 12s have, and I think John Turners Passion did too. Theory was it took all the load out of the Hull as the master cylinder could be located wherever you wanted it to go.
Think cost was a major issue. Most yachts use hydraulics as the norm.
Think cost was a major issue. Most yachts use hydraulics as the norm.