Machinery consisted of 4 three-cylinder draught and with forced draught, giving a speed of with forced draught and with natural draught.
12.
The ship was powered by two 4-cylinder draught and under forced draught, but managed to generate under natural draught during trials.
13.
This is because natural draught is subject to outside air conditions and temperature of flue gases leaving the furnace, as well as the chimney height.
14.
The pieces were part of the furnace wall, the holes designed to allow a natural draught of air to pass through evenly into the furnace.
15.
Early locomotives had no smokebox and relied on a long chimney to provide natural draught for the fire but smokeboxes were soon included in the design for two main reasons.
16.
Each was rated at and operated at a pressure of . The boilers were hand fired and had natural draught to a single chimney at the end of the building.
17.
Designing chimneys and stacks to provide the correct amount of natural draught or draft involves a number of design factors, many of which require iterative trial-and-error methods.
18.
Emissions reductions and increases in thermal efficiency have reached the point where natural draught is no longer sufficient to draw flue gas up the stack, necessitating the use of induced draught fans and / or reheating of the flue gas using natural gas burners.
19.
The ships were equipped with eight rectangular boilers powering two 2-cylinder trunk direct acting steam engines turning two shafts producing 6, 650 indicated horsepower ( IHP ) under a natural draught ( ND ) for a designed speed of 13.75 knots.
20.
She was then the first of the fleet to be modified to burn bunker oil and coal tar; between 8 March and 3 August 1939 " Baragoola " was altered to an oil burner using tar under natural draught, like the " English Electric 7SKM diesel-electric engines.
