Engineering Wonders of the World
Volume III
Forfatter: Archibald Williams
År: 1945
Serie: Engineering Wonders of the World
Forlag: Thomas Nelson and Sons
Sted: London, Edinburgh, Dublin and New York
Sider: 407
UDK: 600 eng- gl
With 424 Illustrations, Maps, and Diagrams
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32
ENGINEERING WONDERS OF THE WORLD.
Fig. 3.—THE GREEN ENGINE. TOP VIEW.
The cam shaft and rocking levers for operating the valves are enclosed in an
oil-tight casing.
crank-case itself—a very de-
sirable feature. Space is left
between the bolts and the
columns through which they
pass for conducting lubricating
oil from a force pump to the
bearings. When th© engine is
running the only visible point
in motion is the fly-wheel.
An 80 horse-power eight-
cylinder V type engine com-
prising the same features was
supplied to the War Office for
a dirigible balloon.
Our list must include the
Anzani three-cylinder engine,
as it was one of these that
outer surface of the rubber. Interchangeable
valves, in detachable cages, fastened down on
the valve ports by internal screwed locking
rings, are used. All joints round pipes and
ports are made water-tight by pressing the
copper jacket against the metal of the cylinder
by suitably shaped screwed nipples and washers.
The valve-operating cam shaft runs along
the top of the cylinders, and is driven through
a vertical spindle (seen on the
left) and bevel gear. An oil-
retaining casing, which encloses
the crank shaft, affords bear-
ings for the eight rocking levers
for operating the valves. The
casing is divided into two
halves vertically, and can be
rotated on the shaft when
holding-down clamps have been
undone, so giving easy access to
the valves. (Fig. 3.)
Tho main bearings are con-
nected directly to the cylinders
by vertical bolts passing through
columns in the cross divisions
of the upper half of the alu-
minium crank-case. The driv-
ing stress is thus taken off the
brought M. Blériot safely across the Channel
in his memorable flight of
July 25, 1909. The cylinders, Anzani
of 100 mm. bore and 150 mm.
stroke, radiate at angles of 60° from the upper
half of the crank-case. The draught from
the propeller serves to carry off excess heat,
so water-cooling is here dispensed with. The
exhaust valves are assisted in scavenging by
Fig. 4.—THE THREE-CYLINDER 25 HORSE-POWER ANZANI ENGINE,
WHICH TOOK M. BLERIOT ACROSS THE CHANNEL.
{Photo, Topical.)