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CHAPTER XXXII
THE WEIGHT PROBLEM IN AERONAUTICS
The design of the
transatlantic airship was carefully made. It was symmetrical,
well-balanced, effective engineering.' Everything was taken into
account—the distance, the speed of the ship, the probable effect of the
winds, the total lifting force, the quantity of fuel that would be needed.
To meet all these requirements the balloon was enlarged in the spring of
1910. Forty-one feet were added to its length in the mid-section,
increasing the volume 87,000 cubic feet, and the total lifting force
nearly three tons. With this enlargement we calculated upon being able to
carry 9,000 pounds of gasoline, the lifeboat, a crew of six men, in
addition, of course, to the ship and all her machinery, and to start with
not more than one-half of the equilibrator upon the sea.
For one who knows the
aeronautic art and the mathematics of it in all its branches, it is not
difficult to prepare a good plan. My design was good. The difficult thing
is the execution of it. In an airship, even more sharply than in a
steamship or land vehicle, limitation of weight is the essence of life and
success. If you cannot build within the predetermined weights perhaps you
would do better not to build at all; for then you will escape much trouble
and disappointment.
Probably it is
possible to find mechanics and constructors who can take a rational
engineering plan and carry it out pretty close to the schedule of weight
and cost, but I have never been fortunate enough to find one. When the
work is finished, it is invariably found that weights have overrun, and
cost has greatly exceeded estimates. In both particulars one learns to
allow a fair margin, but even a liberal margin does not seem to assure
protection against having good plans marred or spoiled by faulty
execution.
From an airship
voyage over the Arctic Ocean in August, 1909, to a steamship race up the
White Nile almost to the equator in March, 1910, was a rather quick
transition, a pretty far cry.
After the plan of our
transocean voyage had been agreed upon, and the actual work started, it
was necessary for me to go up the Nile to meet ex-President Roosevelt. In
the course of that journalistic assignment it became a part of my duty to
hire a special steamer and race rival newspaper men several hundred miles
above Khartum for the satisfaction of being the first to meet the
ex-President—a race which I won with several hours to spare. Col.
Roosevelt and I had breakfasted together aboard his steamer going down the
Nile, after breakfast had sat down and settled all the affairs of all the
nations to our mutual satisfaction, and I had written my cablegram
describing the race and my little triumph before the smoke of my rivals'
boat was seen down the river, puffing toward us as fast as she could with
a party of very much discomfited journalists aboard her.
While up the Nile
with Roosevelt a cable message informed me something had gone wrong with
the arrangements for our transatlantic airship trip. A misunderstanding
had arisen which free use of the cable at fifty cents per word did not
serve to straighten out. It was not till after I had accompanied the
ex-President all through Europe to London, and myself reached America
early in June, that the misunderstanding was removed. This delay cost us
dearly. Mr. Vaniman, who had been in charge of our construction work,
though not an engineer in the true sense, is a clever mechanic and
foreman, and had done the best he could under the discouraging
circumstances. Being compelled to build hurriedly, perhaps it is not
surprising that he was not as careful about the weights as he should have
been, and as he probably would have been under other and more favorable
conditions, though, like all mechanics executing the designs and working
to the calculations of another, he is naturally more keen about strength
than for adhering closely to a weight schedule.
For important parts
of the mechanical and aeronautic equipment he was compelled to rely upon
contractors and various factories, and when they overran the stipulated
weights no time was left for rebuilding to cut weights down. An example is
found in the weight of the lifeboat carried upon the America. I had
stipulated that its weight should not exceed 1,000 pounds. The builder
undertook to keep within that limit; the boat when finished was reported
to weigh 800 pounds. When we put it upon the scales at Atlantic City we
found its weight was just twice as much!
So it went with many
things—so many that by the time the great airship had been assembled and
made ready for a voyage it was found she was about 4,000 pounds short of
the net lifting force the designs called for. Instead of carrying 9,000
pounds of gasoline for the motors, the total was about 5,500. And much of
that was in the tanks of the equilibrator, from which not a gallon was
ever drawn during the voyage.
Worse still, in order
to have enough lifting force to carry gasoline in the big steel reservoir
of the car—its capacity was 1,300 gallons, and we started with the
reservoir about one-third full—it was necessary to lift less of the
serpent than the plan called for; and thus we began the voyage with almost
all of the equilibrator down upon the water, instead of only one-half of
it.
These facts are
cited, not in any effort to escape my individual responsibility, nor as
an apology, but only to show how circumstances sometimes press one into a
venture with the preparations falling far short of his plans and ideals;
and how duty at times compels a man to take an imperfect apparatus, and
without a word of explanation or reproach or repining, go out with it and
do the best he can, no matter at what cost or risk.
Long before we were
ready to leave Atlantic City for the voyage over the ocean it was
realized the plan had not been adequately executed, and that we must
start under this great handicap of overweight. It was impossible to change
the construction; and the overload must be endured. Still, there was not
the first or faintest thought of failing to start. In fact, eagerness to
be off instead of hesitation to go, was the predominant note from first to
last. All the tales told in the press to the contrary were fantastic fakes
created wholly out of the imagination without the slightest 'basis or
foundation in fact or incident or word.
It did take a long,
an unexpectedly long time to prepare the America for her voyage. It
is not surprising that many spectators became impatient as the weeks
dragged along. But the work was complex and difficult, and required
patience. It was not easy to find skilled mechanics, though we paid high
wages and scurried right and left for efficient men. In July, Mr. Vaniman
had cabled me from Paris he could have the America ready for a
voyage in six days after his arrival in Atlantic City, provided he could
have two more weeks in Paris. I gave him one more week in Paris, and then
he shipped the balloon, the unfinished car and machinery to the United
States. He and his experts and a large staff of general helpers 'began the
work of assembling August 9th. But so many and great were the difficulties
in the way that the task was not completed and the airship ready to be
taken out till the afternoon of October 12th. Throughout all this period
every one of us worked with all possible energy to hasten the operation,
and it was rather unkind, to say the least, of the "fake and snake" part
of the press to represent us as seeking delay when we were breaking our
hearts because things did not go faster.
The America
started on her voyage within 60 hours after she was ready.
She started from a
huge balloon house which had been erected at a cost of $12,000 by the
enterprising members of the Aero Club of Atlantic City. These men had
invested their money for the promotion of a great scientific project. They
did not expect to get their money back from the small admission fee, and
in fact they did not. During all the long period of preparation they were
patient and fair. They were more interested in the attainment of a
scientific success than in the commercial side of the venture.
The cause of
aeronautic progress owes much to such men as Joseph W. Salus, Albert T.
Bell, Harry B. Cook, Daniel S. White, John J. White, J. Haines Lippincott,
Louis Kuehnle, Henry W. Leeds, Charles D. White, Walter J. Buzby, Dr. J.
B. Thompson, Walter E. Edge, P. E. Lane, John Vogler, S. P. Leeds and many
others. They are fine types of American business men—men who have broad
views and a generous public spirit. |