THE TRIAL FLIGHT
"All ready now; take her out!"
"Yes, and look out for the side wings! That doorway isn't any too
wide."
"No. We'll have to cut some off, I guess!"
"Say, it's big; isn't it?"
These were the comments of Dick Hamilton and his chums as the fine, new
airship, the Abaris, was wheeled out of the shed where it had been
constructed. And certainly the young millionaire might be proud of his
newest possession. Mr. Vardon and his men had labored well on the
aeroplane.
It was rather a tight squeeze to get the big craft out of the barn
doors, wide as they were, but it was successfully accomplished, and the
craft now stood on a level stretch of grass, ready for her first trial
flight.
Save for a few small details, and the stocking and provisioning of the
craft in preparation for the trip across the continent, everything had
been finished. The big motor had been successfully tested, and had
developed even more power than had been expected. The propellers
delivered a greater thrust on the air than was actually required to
send the Abaris along.
"We'll have that for emergencies," said Dick. "Such as getting about
in a hurricane, and the like."
"I hope we don't get into anything like that," remarked Mr. Vardon,
"but if we do, I think we can weather it."
"How does the gyroscope stabilizer work?" asked Paul, who with Innis,
had made Dick's house his home while the airship was being built.
"It does better than I expected," replied the inventor. "I was a bit
doubtful, on account of having to make it so much larger than my first
model, whether or not it would operate. But it does, perfectly,--at
least it has in the preliminary tests. It remains to be seen whether
or not it will do so when we're in the air, but I trust it will."
"At any rate, Larson hasn't had a chance to tamper with it," said Jack
Butt, grimly.
"No, he hasn't been around," agreed Dick. "I wonder what has become of
him?"
As yet the young millionaire knew nothing of the plans of his Uncle
Ezra, for he had been too busy to visit his relatives in Dankville.
"Well, let's wheel her over to the starting ground," proposed Dick, as
they stood around the airship. A level stretch had been prepared back
of the barn, leading over a broad meadow, and above this the test
flight would be made, as it offered many good landing places.
The airship was so large and heavy, as compared with the ordinary
biplane, that a team of horses was used to pull it to the starting
place. But heavy as it necessarily had to be, to allow the enclosed
cabin to be carried, the young millionaire and his aviator hoped that
the power of the motor would carry them aloft and keep them there.
"Go ahead!" cried Dick, as the team was hitched to the long rope made
fast to the craft. "Take it easy now, we don't want an accident before
we get started. Grit, come back here! This is nothing to get excited
over," for the bulldog was wildly racing here and there, barking
loudly. He did not understand the use of the big, queer-looking
machine.
"Well, I'm just in time, I see!" exclaimed a voice from the direction
of the house. Dick turned and cried:
"Hello, Larry, old man. I'm glad you got here. I was afraid you
wouldn't," and he vigorously shook hands with the young reporter, who
also greeted the other cadets. Grit leaped joyfully upon him, for he
and Larry were great friends.
"Going to take her up, Dick?" asked Larry Dexter.
"Going to try," was the cautious answer.
"Want to take a chance?"
"I sure do! It won't be the first chance I've taken. And I may get a
good story out of this. Got orders from the editor not to let anything
get away from me."
"Well, I hope you have a success to report, and not a failure,"
remarked Paul.
"Same here," echoed Beeby.
When the airship had been hauled to the edge of the starting ground, a
smooth, hard-packed, level space, inclining slightly down grade, so as
to give every advantage, a careful inspection was made of every part of
the craft.
As I have explained, all the vital parts of the Abaris were in the
enclosed cabin, a unique feature of the airship. In that, located
"amid-ships," was the big motor, the various controls, the living,
sleeping and dining-rooms and storage compartments for oil, gasolene
and supplies. Naturally there was no excess room, and quarters were
almost as cramped as on a submarine, where every inch counts.
But there was room enough to move about, and have some comfort. On an
enclosed platform back of the cabin there was more space. That was
like an open deck, and those on it would be protected from the fierce
rushing of the air, by means of the cabin. This cabin, I might add,
was built wedge-shaped, with the small part pointing ahead, to cut down
the air resistance as much as possible.
The big propellers were of course outside the cabin, and in the rear,
where was located the horizontal rudder, for guiding the craft to right
or left. At the rear was also an auxiliary vertical rudder, for
elevating or lowering the craft. The main elevation rudder was in
front, and this was of a new shape, never before used, as far as Mr.
Vardon knew.
There was another feature of the Abaris that was new and one which
added much to the comfort and safety of those aboard her. This had to
do with the starting of the motor and the operation of the big wooden
propellers.
In most aeroplanes, whether of the single or double type, the
propeller, or propellers, are directly connected to the motor. In some
monoplanes the motor, especially the Gnome, itself rotates, carrying
the blades with it. In biplanes, such as the Burgess, Wright or
Curtiss, it is the custom to operate the propellers directly from the
motor, either by means of a shaft, or by sprocket chains.
But, in any case, the starting of the engine means the whirling of the
propellers, for they are directly connected. This is why, when once
the engine stops in mid-air, it can not be started again. Or at least
if it is started it is mostly a matter of chance in getting it to go
under compression or by the spark. There is no chance for the aviator
to get out and whirl the propellers which are, in a measure, what a
flywheel is to an automobile.
Also that is why the aviator has to be in his seat at the controls, and
have some other person start his machine for him, by turning over the
propeller, or propellers until the motor fires.
Lately however, especially since the talk of the flight across the
Atlantic, a means has been found to allow the aviator, or some helper
with him, to start the engine once it has stalled in midair. This is
accomplished by means of a sprocket chain gear and a crank connected to
the engine shaft. The turning handle is within reach of the aviator.
But Mr. Vardon, and Dick, working together, had evolved something
better than this. Of course in their craft, with space to move about
in the cabin, they had an advantage over the ordinary aviator, who, in
case of engine trouble, has no place to step to to make an examination.
But Dick's engine was not directly connected to the propellers. There
was a clutch arrangement, so that the motor could be started, with the
propellers out of gear, and they could be "thrown in," just as an
automobile is started. This gave greater flexibility, and also allowed
for the reversing of the propellers to make a quick stop.
And it was not necessary for Dick to "crank" his motor. An electric
self-starter did this for him, though in case of emergency the engine
could be started by hand.
In fact everything aboard the Abaris was most up-to-date, and it was on
this that Dick counted in winning the big prize.
"Well, I guess everything is as ready as it ever will be," remarked the
young millionaire, as he and the aviator made a final inspection of the
craft. "Get aboard, fellows!"
"He's as cheerful about it as though he were inviting us to a hanging,"
laughed Paul.
"Oh, I'm not worrying about any accident," said Dick quickly. "I'm
only afraid we've made her too big and won't get any speed out of her.
And speed is what's going to count in this trans-continental flight."
"She'll be speedy enough," predicted Mr. Vardon, with a confident air.
Paul, Innis, Larry and Mr. Vardon entered the cabin. Then Dick went
in, followed by Jack Butt, who remained to tighten a guy wire that was
not just to his satisfaction.
"Well, are we all here?" asked Dick, looking around.
"Yes," answered Paul, and there was a note of quiet apprehension in his
voice. Indeed it was rather a risk they were all taking, but they had
confidence in Mr. Vardon.
"Let her go," said Dick to the aviator.
"No, you have the honor of starting her, Mr. Hamilton," insisted Mr.
Vardon, motioning to the electrical apparatus.
"All right! Here goes," announced the wealthy youth, as he pressed the
starting handle. Everyone was on the alert, but nothing happened. The
motor remained "dead."
"What's the trouble?" asked Dick.
"You've always got to turn that switch first, before you turn the
starting handle," explained Jack.
"Oh, sure! How stupid of me!" cried Dick. "And I've started it in
practice a score of times. Well, now, once more."
This time, when the switch had been thrown, the motor started at once
with a throbbing roar. Faster and faster it rotated until the whole
craft trembled. There was considerable noise, for the muffler was not
fully closed. Dick wanted to warm-up the machinery first.
"That'll do!" shouted Mr. Vardon, who was watching the gage that told
the number of revolutions per minute. "Throw in your clutch!"
"Now to see if she'll rise or not," murmured Dick. He pulled the lever
that closed the muffler, thus cutting down, in a great measure, the
throb of the motor. Then, with a look at his chums, he threw in the
clutch. The great propellers began to revolve, and soon were flying
around on their axles with the swiftness of light.
Slowly the Abaris moved forward along the ground.
"We're off!" cried Paul, excitedly.
"Not quite yet," answered Dick. "I want more power than we've got now."
He had it, almost in a moment, for the airship increased her speed
across the slightly downward slope. Faster and faster she rolled along
on the rubber-tired wheels.
"Now!", cried Dick, with his hand on the lever of the elevating rudder.
"Look out for yourselves, fellows!"
He gave a backward pull. A thrill seemed to go through the whole
craft. Her nose rose in the air. The forward wheels left the ground.
Then the back ones tilted up.
Up shot the Abaris at an easy angle. Up and up! Higher and higher!
"We're doing it!" cried Dick, as he looked from the pilot house window
to the earth fast falling below him. "Fellows, she's a success! We're
going up toward the clouds!"