Old Boat - New Boiler

TonyCrehan

Hobart, Australia

Artist's Description

Featured in Traditional Wooden Boats http://www.redbubble.com/groups/traditional-wooden-boats Group on 04/12/12

Boiler, engine and wheel on the steam launch Lady Lyn, taking part in the Wooden Boat Festival at Hobart in February 2011.

Taken with Panasonic Lumix DMC-FH1 point & shoot.

For the technically minded, here are the stats from owner Brian Forster’s website:

“S.L. Lady Lyn”
Owned by Brian Forster of Tasmania

Hull
Length 20 feet, Beam 6’6" Draught about 1’ 9". Hull and decks are Huon pine [shipwright unknown] the gunwales, coamings, keel etc. are all Tasmanian hardwood. The hull was found in very poor condition in Prince of Wales Bay, Hobart. The deadwood keel has been replaced and some planks have been repaired, the ribs were in good condition. The hull was coated with with two layers of epoxy followed by two coats of varnish above the water line and cream painted below plus the decks. The trim is in burgundy.

Engine
Strath Steam “Warrego” piston valve with Stephenson’s reversing valve gear. 3" bore x 4" stroke. 5 hp @ around 500 rpm.110 psi

Boiler
Strath Steam Vertical Fire Tube main drum 18" dia. fire box also 18" ext dia. [lined with refractory cement] tested and certified in South Australia.
Propeller Drive shaft etc……driving thru two CV joints to change the drive shaft angle by 15 deg. thence to a 7/8" Stainless steel 316 shaft via conventional stuffing boxes to a 14" by 22" pitch bronze prop.

Other
Feed water heater in the exhaust line made from a 1" copper exhaust line passing thru a 2′ × 2″dia heater. The keel condenser consists of 3 parallel 5/8″ × 5′ copper tubes connected at both ends to a header thence thru the hull returning the condensate to a hot well situated under the fore deck. Brian has made a hand feed pump that is 2" bore x 2 1/2" stroke. The main boiler feed pump is an off the shelf Hypro positive displacement pump chain driven from the main shaft. A “Metropolitan” 3/8" injector is installed.

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