Plan for installation of Halvorsen C drive

Designer Trygve Halvorsen (1920 - 2014)

Date1971

Object number00049236

NameVessel plan

MediumInk, tracing paper

DimensionsOverall: 250 x 705 mm

ClassificationsMaps, charts and plans

Credit LineANMM Collection Gift from Trygve Halvorsen

Terms

DescriptionTrygve Halvorsen designed this pulling propeller outboard drive for after making two experimental models for his own working boats. It was designed for a Taiwan built ferry owned by Russell Slade, a Sydney businessman. The ferry operated at Kie Ta in Bougainville. The drive allowed the propeller unit to be lifted out of the boat whilst still afloat, which suited the conditions in remote Bougainville for vessel maintenance. This concept is now used internationally with Volvo manufacturing a pulling propeller. It reflects the inventiveness of Trygve Halvorsen as a vessel designer.HistoryTrygve Halvorsen (born 1920, Arendal, Norway) worked variously as a master boat builder, designer and consultant. Like his brothers before him Trygve became an apprentice to his father Lars at 14. While working for Lars Halvorsen Sons Pty Ltd, Trygve ran the Neutral Bay yard until 1939. During WWII he worked at the Ryde boat yard and was in charge of production of the 38 footers designed by Harold Halvorsen as multipurpose vessels used by the Australian Army and Navy, US Army and Royal Netherlands Navy. After the war the Neutral Bay yard was re-opened with a staff of 50 for vessel repairs. In 1951 the Neutral Bay yard was sold to the RAAFand Trygve worked at Ryde and then Bobbin Head until 1964, when he retired. At Bobbin Head Trygve became Director of Lars Halvorsen Sons Pty Ltd until he retired. He was also Chairman and chief designer of Halvorsen, Morsen and Gowland. Trygve was an accomplished yacht designer and competitor in ocean races with his brother Magnus. As a teenager he raced an outboard power speed boat from the Royal Motor Yacht Club, Rose Bay and then harbour raced the yacht ENTERPRISE with his brothers Magnus and Bjarne. During WWII Trygve skippered in the Volunteer Coastal Patrol and was made a Special Constable in the Water Police. In 1961 Trygve was invited by Sir Frank Packer to participate in the first Australian Challenge for the America's Cup held in 1962. He was responsible for towing and maintaining the yachts VIM and GRETEL and their tenders before and during the 1962 challenge. He was also one of GRETEL's three helmsmen, crew selector with Jock Sturrock and Arch Robertson, and also crewed in the first race of the challenge series. Trygve helped to organise Australia's first challenge for the Admiral's Cup in the United Kingdom in 1965 and was selector and chair of the Admiral's Cup selection panel. He hosted overseas yachtsmen including former British Prime Minister, Sir Edward Heath.SignificanceThis plan is illustrated the inventive design of Trygve Halvorsen and provides a solution fo propellor maintenance in remote areas.