Dyad

Status: Steaming

Owner: John Trevelyan

Area: UK-Midlands

Hull

open launch with canopy. Construction: marine ply 3 mm grp skin.
Hull model: beefed up Ruby designed by Selway-Fisher at Melksham in 2000
Built 2010 by owner at Worcester
Fit out 2010 by owner at worcester
LOA: 22' 0", LWL: 19' 0", Beam: 5' 6", Draft: 1' 6", Displacement: 3300 lbs.
Transom stern. Double thickness bottom, double frames (12) 3 mm GRP skin, substantial laminated keel and keelson, welded steel frame bedded on to keel to support engine and boiler. Deck and interior all hardwood fit out seating, lockers etc. Sleeping area for one in bow area.

Boiler

SBA VFT 102 Designed by David Beale,
Built 2015 by T.R.S. Boiler Makers at burton on trent
Fuel: Coal, Pressure: 150 psi,
22" dia Steel barrel. Steel tubes. Welded with rolled in fire tubes construction,
non-condensing, engine driven pump, hand pump, steam feed pump, feed water heater, whistle,
Stainless steam dryer/superheater in smoke hood

Engine

Double acting twin . 2" + 2" X 4"
Built 2007 by John Trevelyan at Worcester
Design: twin high pressure by: 0wner
Slide valve. SLRG valve gear.
Power: 5 (est) HP
Aluminium cyl. block with cast iron liners C.I. sac. plates on valve faces. All wearing parts generously proportioned with 12 point pressurised pumped oil feed to all main bearings. Each cylinder has its own pump. Aluminium base plate. 2 ltr oil box.

Propeller

Bronze, 3 blades, Left Hand, 16" X 30"
Shaft: 11/4" Stainless Steel
New and undamaged

History

Retirement project to build a boat big enough to take out the family and friends for a day, Timescale has been long, but I have tried to work to a consistently high standard and do most of the work myself including (Hull, engine, trailer, woodwork, boiler (except pressure vessel). Priority has been to "get it right " to avoid breakdowns.

Added to the register: 2018.03.26. Last Modified: 2018.03.27.