Ship Model Experiment Tank, Castle Street, Dumbarton

1882-3. E R Mumford, Superintendent of the works (Mumford,

together with William Froude, naval architect (d. 1879), had

previously established a tank at Torquay). Professor J

McQuorn Rankine, engineer. Narrow ashlar frontage, wide

segmental-arched doorway to right, window in corresponding

panel to left; plain pilasters, cornice, parapet swept up in

centre containing carved panel of William Froude.

Long narrow workshop containing testing-tank runs to south.

Walls mostly brick with buttresses and round brace-plates,

earth embankments.

Slate roof with skylights and wooden sarking not original.

Original triangular steel trusses inside. Long narrow

brick-lined tank, faced with cement plaster, runs the full

length of shed. Double teak walkways supported by girders in

side walls and with double tracks for sliding platforms.

Brick extension at south end dates from 1920s and contains a

wavemaker. Modern 3-storey office extension on east side not

included in listing.