Admiralty – 75 horse power boat engines, 1843, 1844

Two 75 horse power side lever boat engines.

Sections and plan of the engine room etc. "for a Steam Packet of 285 tons" (this drawing is marked on the outside "Original Sections of 75s Iron Vessel" and appears to have been used as a wrapper for the other drawings"; sections and plan of engine room "for Navy 75s for Iron Vessel by Messrs. Ditchburn & Mare"; sleeper plates - partially coloured drawing; plan of the engine room deck beams and longitudinal section of the engine room; press copy sketch of dogs for hold down bolts; plan of the engine room etc. - partially coloured drawing; cross-section of boat showing engines, paddles etc. - reverse drawing (marked on the back "Myrmidon 2 75s cross-section", half of this drawing has been torn away and is missing); cross-section of boat showing engines, paddles etc. (marked on the back "Corrected Section 75s"); blow out pipes for boiler - partially coloured drawing. Only the sleeper plate drawing bears a letter code.

For the Admiralty. 75 horse engines were fitted into a boat called the Myrmidon. These drawings were made in the London office. Copies were sent to Soho, with these being sent at a later date.

See also: Portfolios 5/1229, 6/2.