Archive for July, 2007

Don”t open the throttle too quickly, or you may throw the drive belt

20070731 04:04

off, and are also more apt to raise the water and start priming
Don”t open the throttle too quickly, or you may throw the drive belt
off, and are also more apt to raise the water and start priming.

What is lead? Lead is space or opening of port on steam end of

20070728 22:04

cylinder, when engine is on dead center
What is lead? Lead is space or opening of port on steam end of
cylinder, when engine is on dead center. (Dead center is the two points
of disc or crank wheel at which the crank pin is in direct line with
piston and at which no amount of steam will start the engine.) Different
makes of engines differ to such an extent that it is impossible to give
any rule or any definite amount of lead for an engine. For instance, an
engine with a port six inches long and one-half inch wide would require
much less lead than one with a port four inches long and one inch wide.
Suppose I should say one-sixteenth of an inch was the proper lead. In
one engine you would have an opening one-sixteenth of an inch wide and
six inches long and in the other you would have one-sixteenth of an inch
wide and four inches long; so you can readily see that it is impossible
to give the amount of lead for an engine without knowing the piston
area, length of port, speed, etc. Lead allows live steam to enter the
cylinder just ahead of the piston at the point of finishing the stroke,
and forms a ‘cushion,’ and enables the engine to pass the center without
a jar. Too much lead is a source of weakness to an engine, as it allows
the steam to enter the cylinder too soon and forms a back pressure and
tends to prevent the engine from passing the center. It will,
therefore, make your engine bump, and make it very difficult to hold the
packing in stuffing box.

Loose eccentric yokes will make a knock in an engine, and it may appear

20070728 16:04

to be in the wrist
Loose eccentric yokes will make a knock in an engine, and it may appear
to be in the wrist. You will find packing between the two halves of the
yoke. Take out a thin sheet of this packing, but don”t take out too
much, as you are liable then to get them too tight and they may stick
and cause your eccentrics to slip. We will have more to say about the
slipping of the eccentrics.

The engine should be run slowly and carefully for a while, to give a

20070724 16:04

chance to find out if anything is going to heat, before putting on any
load
The engine should be run slowly and carefully for a while, to give a
chance to find out if anything is going to heat, before putting on any
load.

In testing for the purpose of ascertaining if you have a good job on

20070721 10:04

your flues, it is not necessary to put on any greater cold water
pressure than you are in the habit of carrying
In testing for the purpose of ascertaining if you have a good job on
your flues, it is not necessary to put on any greater cold water
pressure than you are in the habit of carrying. For instance, if your
safety valve is set at one hundred and ten pounds, this pressure of cold
water will be sufficient to test the flues.

A cross head pump consists of a pump barrel, a plunger, one vertical

20070719 22:04

check valve and two horizontal check valves, a globe valve and one stop
cock, with more or less piping
A cross head pump consists of a pump barrel, a plunger, one vertical
check valve and two horizontal check valves, a globe valve and one stop
cock, with more or less piping. We will now locate each of these parts
and will then note the part that each performs in the process of feeding
the boiler.

It is true that in a certain sense it does tell the engineer when to do

20070717 04:04

certain things, but not as a clock would tell the time of day
It is true that in a certain sense it does tell the engineer when to do
certain things, but not as a clock would tell the time of day. The
office of a steam gauge is to enable you to read the pressure on your
boiler at all times, the same as a scale will enable you to determine
the weight of any object.

For instance, a I inch belt of the standard grade with the proper

20070716 10:04

tention, neither too tight or too loose, running at a
For instance, a I inch belt of the standard grade with the proper
tention, neither too tight or too loose, running at a. maximum spead of
800 ft. a minute will transmit one horse power, running 1600 ft. 2 horse
power and 2400 ft. 3 horse power. A 2 inch belt, at the same speed,
twice the power.

The heaters are made in several different designs, but it is not

20070713 04:04

necessary to describe all of them, as they require little attention and
they all answer the same purpose
The heaters are made in several different designs, but it is not
necessary to describe all of them, as they require little attention and
they all answer the same purpose. The most of them are made by the use
of a hollow bedplate with steam fitted heads or plates. The water pipe
passes through the plate at the end of the heater into the hollow
chamber, and a coil of pipes is formed, and the pipe then passes back
through the head or plate to the hot water check valve and into the
boiler.

Q

20070710 04:04

Q. Suppose you had a heavy load or about all you could
handle, and should approach a long steep hill, what condition
should the water and fire be to give you the most advantage?
A. A moderately low gauge of water and a very hot fire.