Amaryllis II – an exceptional steam launch

A fine steam launch with saloon

A fine and exceptional steam launch which could of course be converted to electric or diesel power if the launch appeals but the steaming doesn’t. However this would be a shame as the launch has a 25 hp triple expansion engine based on LIFU’s two cylinder 30hp compound. According to the owner who commissioned the boat originally, she is a pleasure to operate and to enjoy with enough space to enable comfortable cruising on any inland waterway. He has always kept her on the Broads where she lives in a covered boathouse.

The hull was built by the International Boatbuilding Training Company in 1995 of iroko on oak. She came from the drawing board of Paul Fisher and was based on a Dixon Kemp design as described and illustrated in his famous book Naval Architecture (1895 edition). Looking at her you would be forgiven for thinking that she is a very well maintained Victorian launch. The owner insisted on the very best materials for her build, using iroko planking on oak timbers, fastened throughout with copper and silicon bronze. The decks are of teak as is the joinery and saloon. There is ample seating for guests in three separate areas whether alongside the helm, in the aft cockpit or in the cosy bow section. The cabin seats another four in comfort and has a table for entertaining.

The engineering was finally completed in 2002. The machining was done by RAM engineering of Debden Green, Essex and the project was overseen by two distinguished professional engineers, the late Peter Frost and Hugh Mothersole. She cruises along quietly and is both economical and very maneouvrable.

For the steam enthusiast here are some data :

The triple expansion engine is 3 3/8+5 1/2 + 7 7/8 + 5 1/2 (all inches).

The 3 drum water tube boiler generates approximately 900 lbs steam per hour and the 240 volt oil burner by NuWay is auomatically pressure regulated to maintain a working pressure of 267-275 psi. This is powered by 2 x 225 amp/h gel batteries supplemented if required, by an alternator driven off a layshaft which also drives a 3 cylinder boiler feed pump.

A Victron battery state monitor reports battery condition.

The shaft swings a 27×40 inch propeller, designed by Bruntons for Amaryllis II and using an Aquadrive flexible coupling and thrust block which gives her 6 knots at 200 rpm with a 23 inch vacuum. Her maximum speed has been calculated at 8 knots (375 rpm).

As you would expect, the launch has a comprehensive set of gauges: boilder, HP, MP, LP, Vac, Feed and matching rev counter by the late Alex Ritchie.

Boiler feedwater passes through a 4 stage filter system in the 12 gallon hot well.

Fuel capacity is 100 litres, water feed 113 litres.

All the necessary steam certification is up to date and available for inspection.

The lucky purchaser will have access to a full set of spare boiler tubes and other items including a bespoke 6 wheeled 5 tonne capacity galvanised road trailer.

The launch weighs 4.25 tonnes, has a draft of 3ft6ins and an air draft of 6ft 6ins.

Please ask if you would like more information on converting this steam launch to another mode of propulsion. Viewing is strictly by appointment on site in Norfolk.