A complete Kingdons patent twin tandem quadruple expansion yacht tender steam set by Simpson Strickland and Company Dartmouth Devon circa 1890.
The mahogany brass bound lagged cylinders are 1.5, 2, 2.75 and 4.5 bores by 3 stroke and are fitted with bottle lubricators and fully piped cylinder and valvechest draincocks and simpling valve. Grooved bar Stephenson link motion is operated by a hand lever with locking turnscrew and slotted quadrant. The cast gunmetal back-frames incorporate the crosshead guides and the crossheads drive the airpump exhausting into a hot-well and a feedpump with priming cock and pressure dome.
The crankshaft is complete with a driving flange with barring holes and on the forward end a disc pulley wheel to drive the boiler air fan.
The boiler is also brass bound and beaded mahogany lagged and incorporates main stop and safety valves, clack valves and blowdown valve, pressure and water gauges. Inspection door and washout plugs.
The boiler is of the Kingdon patent type, has 120 vertical firetubes, single tubeplate stay, curved firedoor and firebox flange riveted to the baseplate. The baseplate is pierced for the fan on the port side and large hand feedpump on the starboard side. All boiler controls are forward and engine controls aft to port, suggesting two crew.
The set is complete with the faired cast bronzed condenser skin fittings and original propeller.