Famous Aeronautical Pioneers Quotes & Quotations
   

 
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" A great increase of velocity adds enormously to the weight on the aeroplane, as the weight is trying to flatten the inverted cone. "

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. "

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. "

Lawrence Hargrave
" Bent metal is worse than bent wood and weight for weight is more flexible. "

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. "

Lawrence Hargrave
" Contact is made, the compressed mixture explodes driving down the piston, flapping the wings, storing power in the springs for the up stroke, and compressing the mixture in the crank chamber. This is all, and it is repeated till there is a misfire or the effects of bad workmanship stop the engine. "

Lawrence Hargrave
" Couple this with the fact that the head resistance of a sailing bird's form and the delicate arch of its wings are the survivals of untold numbers of cruder types, and no surprise should be felt at any intricate tactics pursued when further sided by the power derived from the wind and roughened sea. "

Lawrence Hargrave
" I am not aware that anyone has attempted to show that sailing flight by wave-power alone is a practicable art, but even if some one else has done so, an observation from an independent source confirming old work cannot fail to be of interest. "

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. "

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. "

Lawrence Hargrave
" Now there has been no flapping and the performance takes place with or without wind, all the bird requires is the wave. "

Lawrence Hargrave
" Observe that the wave I instance in this example, is one of the low round topped sort that prevail in calm weather. "

Lawrence Hargrave
" Of course if I lived in the centre of a sany plain, with numerous assistants to make and repair constructions of my design, certain advantages would accrue, but at present I try to make the utmost use of the facilities at my disposal. "

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. "

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. "

Lawrence Hargrave
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