Breedendam Steam Transom Sloop

Stock # 180634
The Steam Transom Sloop “De Breedendam”
Represents traditional Dutch craftsmanship combined with durable modern construction, resulting in a unique and highly collectible steam launch. Although this vessel presents itself as a museum-quality exhibit, it was purpose-built to deliver genuine and enjoyable cruising under steam.

-Principal Dimensions
Length Overall (LOA): 3.70 m (12.1 ft)
Beam: 1.50 m (4.9 ft)
Draft: 0.40 m (1.3 ft)

-Construction
Hull: Glass-fiber reinforced polyester (GRP)
Sheer strake, stem, and interior joinery: Solid oak, clear varnished
Finish: Classic traditional detailing with high-quality woodworking throughout
The use of GRP provides structural stability and reduced long-term maintenance, while the oak detailing preserves the authentic appearance of a classic steam launch.

-Boiler (Ketel)
Type: Vertical fire-tube boiler
Configuration: 31 fire tubes
Boiler shell: Red copper
Chimney: Brass
Steam output: 60 kg of steam per hour
Operating temperature: 174°C (345°F)
Operating pressure: 7 bar (approx. 101 psi), with forced draft
Fuel: Wood and coal

-Steam Engine (Machine)
Type: Single-cylinder, full-pressure steam engine
Maximum speed: 800 RPM
Reversing gear: Stephenson link motion

-Craftsmanship
The entire vessel is completely hand-built, including:
The hull
The boiler
The steam engine
This level of craftsmanship places the vessel firmly within the realm of traditional steam engineering and artisanal boatbuilding.

Certification
The Steam Transom Sloop was delivered with all required inspections and approvals from the “Nederlandse Stoomwezen” (Dutch Steam Authority), confirming compliance with official steam safety and operating standards at the time of delivery.

-Builder
Scheepswerf De Breedendam
Steenovenlaan 6 (near the ferry crossing)
4101 AM Culemborg, Netherlands

-Summary
The Stoomspiegelsloep “De Breedendam” is a rare, fully hand-crafted Dutch steam launch combining traditional aesthetics with durable composite construction. With its copper boiler, brass chimney, oak interior, and certified steam machinery, it occupies a unique position in the classic and historic vessel market—equally suitable for private collection, heritage display, or live steam operation by an experienced enthusiast.