If she has negative buoyancy she will sink, but while under way with as much as a ton of positive or negative buoyancy the hydroplanes will absolutely control the depth of the vessel.
Hydroplanes might be said to correspond to the side fins of a fish.
In the upper diagram the entering edges of the hydroplanes are inclined downward, and the force of the passing stream lines strikes upon the upper face of the blades.
The capability of this arrangement of hydroplanes and horizontal rudders to control the depth of submergence was questioned and doubted for many years.
By pulling the hatch cover down and inclining the hydroplanes downward the vessel could be almost instantly submerged--submergence not occupying over fifteen seconds.
When the desired depth is reached the operator sets the inclination of the hydroplanes so as to just balance the upward pull of the one ton of positive buoyancy, and the vessel proceeds at the desired depth.
The hydroplanes are symmetrically disposed on two sides of the vessel.
Now if hydroplanes are located at equal distances fore and aft their up or down pull is always balanced and does not cause the vessel to dive or broach, but holds her to a level keel.
The Gustave Zede had also been modified by adding hydroplanes so that she became controllable submerged.
Hydroplanes both fore and aft are now generally used to assist in regulating and controlling stability in the submerged state.
The forward hydroplanes caught in the net jammed at "10 deg.
A boat patrolling in a slight swell keeps up a gentle roll at periscope depth, and all the time one hears the rattle and click of the shafting as the fore and aft hydroplanes are worked to keep her at her depth-line.
By putting three men on the wheel the bow hydroplanes were moved a little, and after ten minutes at 245 feet the boat started to rise.
Both forward hydroplanes and the bow cap are gone; the upper part of the hull in that vicinity as well as both starboard torpedo-tubes are wrecked.
Then the hydroplanes are turned down and they force the submarine under the water.
He could then have done a "crash" dive in about thirty seconds, going under with hydroplaneshard down, full weigh on, and taking in water ballast.
The coastal motor-boats were small hydroplanes filled full of big engines and could do forty knots full out.
Well, we've never tried the hydroplanesin rough water, and there is always the chance for an accident.
So, if bigger hydroplanes are going to make it more certain for us to survive an accident, put them on.
You have proved that your hydroplanes are all right.
The hydroplanes were really water-tight hollow boxes, large and buoyant enough to sustain the airship on the surface of the water.
One of their hydroplanes had hit it, and had broken off.
The hydroplanes will keep us afloat a little while,” said Jerry in a tense voice, as he looked about as if for some other means of averting the disaster that was about to overtake them.
That’s the most important thing,” rejoined Ned, who was standing by, ready to release the hydroplanes when Jerry should give the word.
The motorship was, as its name indicates, a veritable ship, and the addition of hydroplanes enabled it to navigate on the water as well as in the air.
When in motion the hydroplanes will either hold them down or lift them up according to the angle to which these horizontal rudders are tipped.
When coming to the surface the hydroplanes are used and if the boat is to remain on the surface water is blown out of the ballast tanks.
These hydroplanes (they must not be confused with hydroaeroplanes) almost fly over the water.
The submarine is submerged by letting water into the ballast tanks and then turning the hydroplanes to a diving angle.
He was not looking at hydroplanes over the fence of the aerodrome.
In the Baltic, however, three Russian hydroplanes in the Irben Strait engaged four German machines, bringing down one.
Our aerial service is increasing; we have now a Royal Navy flight section, which has hydroplanes as well.
Say, it’s lucky you thought to let the hydroplanes down,” spoke Bob, as he looked out at the flood sweeping past them.
One of the hydroplanes is smashed and a bicycle wheel crushed!
If you boys have ever seen a water-spider, or bug, skimming along on the brook or lake, as you doubtless have, you will get a good idea of how the hydroplanes worked by recalling to mind the insect.
The little axe came down as the Comet lifted her dripping hydroplanes out of the water, and, freed from the holding cables, she soared aloft.
Upward and upward she mounted, the rear hydroplanes being now clear of the water.
The front end was elevated, the forward hydroplanes emerging dripping from the liquid element.
No, but you never can tell what you want to do," declared Jerry, "and the hydroplanes might be very useful some day.
I tell you what let's do: go down on the hydroplanes and fish!
The hydroplanes which were on toggle-joint arms had been lifted up off the ground, and could be let down when it was desired to float on water.
The article says that by means of the hydroplanes it is possible for an aeroplane to also land on the water and float.
Jerry, too, wondered how his new attachment would work when there was a swell on, for, up to now, he had only tested the hydroplanes on comparatively smooth water.
I guess now you agree with me, don't you, Bob, that thehydroplanes are all right?
Would the rear end of the airship--the big after-hydroplanes clear them; or would they dash them to death?
Now what I want to do is to attach hydroplanes to our Comet.
In fact, I was thinking of going down shortly to see how the hydroplanes worked on salt water.
Hydroplanes are the latest idea, and I say we ought to put them on the Comet, and also make other improvements.
We'll be there in half an hour, and then we can see how the hydroplanes work.
The hydroplanes work as well on the ocean as they did on the lake.
The hydroplanes of the enemy had risen from the sea and were coming to meet our brave airmen with their pitiful little fleet of biplanes.
But the hydroplanes pull it up and down, two pairs of them set fore and aft of the centre of gravity.
I will now set the hydroplanes at ten degrees down and the horizontal rudder two degrees up, and the boat will submerge to a depth of thirty feet and run constant at that depth.
The Admiral has ordered a couple of aero-hydroplanes to manoeuvre over the place indicated at noon, and to keep a sharp look-out for any suspicious object under the surface.
Aero-hydroplanes had left their sheds on the shores of Fareham Creek and were rising rapidly to the height of one thousand feet.
To and fro, in elliptical curves, the aero-hydroplanes maintained their lofty vigil, each turning at almost the same moment and passing within fifty yards of one another.
Although not in the accepted sense of the word an aerial torpedo, the rocket had seriously affected the stability of the two aero-hydroplanes that were at a distance hitherto considered as a safe margin.
They saw the two aero-hydroplanes approach and manoeuvre over the pre-arranged area.
They had gone farther than that in one day, and he wanted to try the hydroplanes on a large body of fresh water.
The Comet is more like a touring auto--built for pleasure, and since we put on the hydroplanes it's considerably heavier than it was.
Jerry; and Bob and Ned pulled on the levers, folding up the bicycle wheels, and shunting into place on the toggle-jointed arms the hydroplanes that would keep the Comet afloat.
You haven't had a chance to try thehydroplanes lately, and you are afraid they won't work.
Every day the four aero-hydroplanes were exercised, the little craft often making extended passages and ascending to a great height.
In obedience to signals the three aero-hydroplanes followed the movements of their leader, and came to rest on the surface of the sea.
Promptly the Cerberus headed northwards on the look-out for the stolen cruiser, and Drake obtained his commanding officer's permission to take out the four aero-hydroplanes for reconnoitring purposes at day break on the following morning.
Overhead her four tenders--for the remaining two aero-hydroplanes had arrived on the scene--were manoeuvring at a safe altitude in order to observe the effect of the gunfire.
Shortly after midday the aero-hydroplanes were recalled in order to recharge accumulators and replenish petrol tanks, and also to give the wearied though enthusiastic men a well-earned rest.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "hydroplanes" in a variety of sentences. We hope that you will now be able to make sentences using this word.
