Archive for August, 2007

Q

20070831 10:04

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.

If you are in a dangerous place, owing to the wind and the surroundings,

20070830 22:04

don”t hesitate to state your fears to the man for whom you are
threshing
If you are in a dangerous place, owing to the wind and the surroundings,
don”t hesitate to state your fears to the man for whom you are
threshing. He is not supposed to know the danger as well as you, and
if, after your advice, he says go ahead, you have placed the
responsibility on him; but even after you have done this, it sometimes
shows a good head to refuse to fire with wood, especially when you are
required to fire with old rails, which is a common fuel in a timbered
country. While they make a hot fire in a firebox, they sometimes start
a hot one outside of it. It is part of your business to be as careful as
you can. What I mean is take reasonable precaution, in looking after
the screen in stack. If it burns out get a new one. With reasonable
diligence and care, you will never set anything on fire, while on the
other hand, a careless engineer may do quite a lot of damage.

If the trouble is in the valve or steam chest, you had best take it off

20070828 10:04

and have the valve seat planed down, and the valve seated to it
If the trouble is in the valve or steam chest, you had best take it off
and have the valve seat planed down, and the valve seated to it. This
is the safest and best way. Never attempt to dress a valve down, you
are most certain to make a bad job of it.

Too many engineers forget that when he is fooling around that he is the

20070827 22:04

only one losing time
Too many engineers forget that when he is fooling around that he is the
only one losing time. The facts are the entire crew are doing nothing,
besides the outfit is making no money unless running.

A stop cock should be used next to boiler, as you ascertain whether it

20070826 10:04

is open or shut by merely looking at it, while the globe valve can be
closed by some meddlesome party and you would not discover it, and would
burst some part of your pump by forcing water against it
A stop cock should be used next to boiler, as you ascertain whether it
is open or shut by merely looking at it, while the globe valve can be
closed by some meddlesome party and you would not discover it, and would
burst some part of your pump by forcing water against it.

A locomotive engineer makes a run for a hill in order that the momentum

20070826 04:03

of his train will help carry him over
A locomotive engineer makes a run for a hill in order that the momentum
of his train will help carry him over. It is not so with a traction and
its load; the momentum that you get don”t push very hard.

The proper and accurate setting of a valve on a steam engine is one of

20070825 04:03

the most important duties that you will have to perform, as it requires
a nicety of calculation and a mechanical accuracy
The proper and accurate setting of a valve on a steam engine is one of
the most important duties that you will have to perform, as it requires
a nicety of calculation and a mechanical accuracy. And when we remember
also, that this is another one of the things for which no uniform rule
can be adopted, owing to the many circumstances which go to make an
engine so different under different conditions, we find it very
difficult to give you the light on this part of your duty which we would
wish to. We, however, hope to make it so clear to you that by the aid
of the engine before you, you can readily understand the conditions and
principles which control the valve in the particular engine which you
may have under your management.

Q

20070824 22:03

Q. What is the power of a 7 x 10 engine, running 200
revolutions, cutting off at 1/2 stroke with 60 pounds steam?
A. 7 x 7 = 49 x .7854 = 38.4846. The average pressure of
60 pounds would be 50 pounds less 5 = 45 pounds; 38-4846 x
45 = 1731.8070 x .333 1/3, (the number of feet the piston
travels per minute) 577,269.0000 by 33,000=17 1/2 horse
power.

Now suppose you take a boiler the same length and of the same material,

20070824 16:03

but 80 inches in diameter
Now suppose you take a boiler the same length and of the same material,
but 80 inches in diameter. The bursting pressure would be 3,240,000 /
(80 x 72) = 560 lbs., and the safe working pressure would be 560 / 6 =
93 lbs.

If you should have two plugs, as soon as you have melted out one replace

20070819 16:04

it with the new one, and refill the other at your earliest convenience
If you should have two plugs, as soon as you have melted out one replace
it with the new one, and refill the other at your earliest convenience.
By the time you have replaced a fusible plug a few times in a hot boiler
you will conclude it is better to keep water over your crown sheet.