Lawrence Hargrave quotes, quotations, poems, phrases, words
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Lawrence Hargrave QUOTES / QUOTATIONS
A great increase of velocity adds enormously to the weight on the aeroplane, as the weight is trying to flatten the inverted cone.
Quotation of Lawrence Hargrave
And from a poise at this station the plane may swoop down, at great disadvantage if close to the back of the wave, at various slopes and directions till it cuts into the air that is being raised by the face of the following wave, which again enables it to resume its velocity.
Quotation of Lawrence Hargrave
As to the effect of the wave on the air, we will suppose the water to be quite flat and the air motionless, a heavy undulation comes on the scene, it has to pass, so it pushes the air up with its face, letting it fall again as its back glides onwards.
Quotation of Lawrence Hargrave
Bent metal is worse than bent wood and weight for weight is more flexible.
Quotation of Lawrence Hargrave
Common sense steps in here and says: Separate the parts you want to be mobile from the parts you want to be inert. You have seen the result, and I know many have the skill to apply it.
Quotation of Lawrence Hargrave
If you direct your attention to the position of a bird with regard to the wave surface, it will speedily be noticed to be nearly always on the rising side or face of the wave and moving apparently at right angles to the wave's course, but really diagonal to it.
Quotation of Lawrence Hargrave
It becomes a giant's task to compute the result when the effect of cross seas, wind at all angles and ever varying force, arched surfaces, head resistance, ratio of weight to area, and the intelligence of the guiding power crop up.
Quotation of Lawrence Hargrave
Now there has been no flapping and the performance takes place with or without wind, all the bird requires is the wave.
Quotation of Lawrence Hargrave
Observe that the wave I instance in this example, is one of the low round topped sort that prevail in calm weather.
Quotation of Lawrence Hargrave
The case I wish you to consider is that of a sea-wave, for example one hundred and eighty feet long and ten feet high, travelling at eighteen knots, or say, thirty feet per second under calm air.
Quotation of Lawrence Hargrave
The closer the bird is to the surface of the water, the firmer and more inelastic is the uplift of the rising air. The bird appears to almost feel the surface with the tip of its weather wing.
Quotation of Lawrence Hargrave
The most ordinary conditions for observing sailing birds are then the wind and sea are both aft.
Quotation of Lawrence Hargrave
The only exceptions I know are the frigate bird, and the boatswain bird; these two soar at high altitudes for long distances on motionless wings.
Quotation of Lawrence Hargrave
The plane is simply abstracting the power stored in the wave by a distant gale, and using it to counteract gravity. And if the work be continued long enough, or a multitude of planes be continually drawing on the reservoir of power, the wave must inevitably be flattened.
Quotation of Lawrence Hargrave
The rapid progress of aeronautics is hampered and delayed by the want of a method of ensuring automatic longitudinal and transversal stability.
Quotation of Lawrence Hargrave
The wings are moved several times by hand to charge the crank chamber with mixture, which flows on through the external pipe and inlet valve to the compression space and cylinder.
Quotation of Lawrence Hargrave
There are many birds frequenting the southern oceans beyond the limits of the S.E. trade winds that are not adapted for soaring, and yet they circle, glide and swoop around without flapping their wings.
Quotation of Lawrence Hargrave
To remove this obstacle I repeat or refer to such knowledge as has come under my notice, my own previously expressed views, and also describe and exhibit my last experiments and explain their novelty and utility.
Quotation of Lawrence Hargrave
Used as kites, these rigid stable aeroplanes are superior to the very best cellular kites I can make; they are lighter, pull harder per square foot, attain a greater angle of elevation, and have fewer parts.
Quotation of Lawrence Hargrave
When their qualities become known, the two-celled kite will be considered a, barbarism of the past.
Quotation of Lawrence Hargrave
You have seen here aeroplanes with absolutely no extensions fore and sit of their canvas, that maintain automatic stability both longitudinally and transversely under most trying circumstances.
Quotation of Lawrence Hargrave
You have seen how the exact work of W. R. Turnbull was not of the slightest use to aeronautics till it could be combined with the other essentials of flying.
Quotation of Lawrence Hargrave