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Updated: June 17, 2025
Penaud's machine, relying only on india rubber under torsion, flies for some fifty yards. What a model can do, as Bishop Wilkins well observes, a properly weighted and proportioned flying-machine, capable of carrying a man, can do also." "But yours, when I first had the pleasure of meeting you, was not carrying you at all." "Something had gone wrong with the mechanism," answered Winter, sighing.
Mr. Kent has devised a modification of Dr. It is applied in those varieties of the torsion balance in which there are two parallel beams, connected by either four or six wires.
For you see, if a man is trying to make a model aeroplane for a poor family in the lower part of the town and he is brought to a stop by the need of reckoning the coefficient of torsion of cast-iron rods, it shows plainly enough that the colleges are not truly filling their divine mission. But the figures that I speak of were not those of the model aeroplane. These were far more serious.
From the vertical point, where this force is nothing, to the horizontal point, where it is at its maximum, the force of torsion exerted on the crank shaft is constantly varying; and the fly wheel by its momentum redresses these irregularities, and carries the crank through that "dead point," as it is termed, where the piston cannot impart any rotative force.
Run the tips of the fingers briskly down the backbone, and the spines of the vertebræ will be tipped with red so that they can be readily counted. Have the model lean forward with the arms folded across the chest; this will make the spines of the vertebræ more prominent. Experiment 8. To illustrate the movement of torsion in the spine, or its rotation round its own axis.
One of the first forms of the torsion balance which met the disapproval of the "Encyclopedia Britannica" was attended with the difficulty that the pivoted wires were attached directly to the bifurcated ends of the beam, and could not be tensioned without bending these ends unless the beam was made so heavy as to interfere with its employment in delicate weighing.
Hardening his neck muscles until they covered the delicate parts beneath like bands of steel, the detective seized his enemy's extended arm in his two hands, one at the wrist, one at the elbow, and as his trained fingers sought the painful pressure points, his two free arms started a resistless torsion movement on the captured arm.
If the hæmorrhage is from a partly divided vessel, this should be completely cut across to enable its walls to contract and retract, and to facilitate the application of forceps and ligatures. Torsion. This method is seldom employed except for comparatively small vessels, but it is applicable to even the largest arteries.
Such a gun, in a firing-machine, with powder enough to overcome all the friction, and heavy enough to counteract torsion and springing, would give very great accuracy, if perfectly made, or as well made as American rifles generally; but no maker in England, not even Mr. Whitworth, has attained that point yet; and even so made, they would never be available as service or hunting-guns.
The lateral equilibrium and the steering to right or left was to be attained by a peculiar torsion of the main surfaces which was equivalent to presenting one end of the wings at a greater angle than the other. In the main frame a few changes were also made in the details of construction and trussing employed by Mr Chanute.
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