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Updated: June 25, 2025
"Sound asleep in my berth; I had no time even to put on my clothes; but, thank God, if I can escape in any way." "Stick to us, and help shove this craft, and I'm in hopes we'll fetch up somewhere by morning." Under the united propulsion of three men and a large Newfoundland dog, the small raft moved shoreward with no insignificant speed.
An immense forward stride, however, was made when the idea was first conceived of a steam-turbine and a water-turbine being fixed on the same shaft and the latter being used for the propulsion of a vessel at sea.
The cylindrical thing was another gas-pipe bomb; the iron tail was a smaller pipe containing and armoring the fuse, and serving also as the means of propulsion. They were coupling on additional lengths of the fuse-carrying pipe as they were needed; hence the jerking advances and pauses. Adair's low laugh was as care-free as ever.
There's only one thing which may bother us in the Frisian Meers, where we can't shove with a quant pole, or if we venture out to sea: we have no means of propulsion except the motor, and as we carry no mast, we cannot set so much as a yard of canvas. If anything should go wrong with the motor, brilliant "Lorelei" will instantly become a mere hulk at the mercy of wind and wave.
Whatever may be urged regarding dates and patents or earlier years in which the screw-propeller was used, it is a fact that in 1833-35 it was not recognized as an accepted mode of propulsion. While known as a possibility, it had no standing in the engineering practice of the day.
Maxim, in Artificial and Natural Flight, details the engine which he constructed for use with his giant experimental flying machine, and his description is worthy of reproduction since it is that of the only steam engine besides Giffard's, and apart from those used for the propulsion of models, designed for driving an aeroplane.
But while the force of the twist itself is not affected by the rate of the forward movement, its effect upon the ball is greatly nullified. The force of propulsion being so great at first, drives the ball through the air and prevents it from being influenced by the unequal resistance.
Elsewhere State credit was building canals and railroads: why should Illinois, so generously endowed by nature, lag behind? Where crops were spoiling for a market, farmers were not disposed to inquire into the mysteries of high finance and the nature of public credit. All doubts were laid to rest by the magic phrase "natural resources." Mass-meetings here and there gave propulsion to the movement.
The favourable report turned in by the Committee after the meeting of October 2nd was found justified by the results demonstrated on the grounds, and the first problem of aviation, namely, the creation of efficient motive power, could be considered as solved, since the propulsion of the apparatus in the air would be a great deal easier than the traction on the ground, provided that the second part of the problem, the sustaining of the machine in the air, would be realised.
Four left, and they were getting close! Santos scored a direct hit on the nose of the nearest one, but its momentum drove it within a few yards of the asteroid. Five space-suited figures erupted from it, holding hand propulsion units, tubes of rocket fuel used for hand combat in empty space. The Connies lit off their propulsion tubes and drove feet first for the asteroid.
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