Built in 1887 at Bergsunds Mek. Verkstad, Stockholm
Sweden
Call sign
Measures in meter
Tonnage
Engine
kW
Speed
Knots
Length
Beam
Draught
Gross
Net
SFB-6090
17.15
3.56
1.09
4.4
8
Wood- and coal-fired fire tube boiler with one furnace. 6
bar.
Single cylinder enginewith Stephenson's reversing link
motion and an expansion slide valve.
Refurbished in 1971 at Ekenäs south of Kalmar Sweden
Signal
letters
Measures in meter
Tonnage
Engine
kW
Speed
Knots
Length
Beam
Draught
Gross
Net
SFB-6090
16.48
3.75
1.54
16.25
30
9
Wood- and coal-fired fire tube boiler with one furnace. 6
bar.
Single cylinder engine with Stephenson's reversing link
motion and an expansion slide valve.
The measures differ so much and the hull is all-welded so I
guess this is a copy of the original boat. In a boat from 1887 it should be at
least some rivets left.
The engine onboard SL Thor
The entire engine room is a space behind a fence where the engineer operates
the engine and the boiler. At the lower part of the picture is the main steam
pipe from the boiler to the engine.
It's a good bet that the steam pipe was red-panted in the old days.
The fire tube boiler with one furnace.
Just ignited, one hour before departure.
Stephenson's reversing link motion and the expansion slide valve rod.
A. The normal slide valve.
B. The expansion slide valve.
The expansion slide valve's excenter is 180° before the crank and
therefore the expansion slide valve closes the steam passage to the cylinder
before the normal slide does. Turning the expansion slide rod will adjusted the
plates in the expansion slide valve to increase or deceases the expansion.
