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His undercarriage gave, the propeller hit the earth and smashed itself, and the machine heeled over and pulled up dead, with one wing leaning on the ground. Marmaduke, our war baby, was the pilot of the maimed machine. He is distinctly young, but he can on occasion declaim impassioned language in a manner that would be creditable to the most liver-ridden major in the Indian Army.
A lever extends downwards from the end of the valve shaft, which is connected by a pin to the brass block within the link; and the link is moved up or down by the starting handle, which, by means of a spring bolt shooting into a quadrant, holds the starting handle at any position in which it may be set. Q. What is the diameter and pitch of the screw propeller?
However, he picked up confidence when the next day brought an offer from the builders to turn out an aluminium sneak-box in three divisions, with capacity for a crew of six, to be worked on occasion by two men pulling at levers, driving the propeller by means of endless chains and cog- wheels, the gear to be made of best oil-tempered nickel-steel, with hardened ball bearings.
The screw propeller 'Superior, with New York mails of the 15th, has reached Queenstown. On the Banks of Newfoundland she passed the wreck of a large steamer, supposed to be the 'Oceana." "Oh, Berenice! Oh, Berenice! Can this be true? Oh! Speak a word of hope or comfort to me!" cried Claudia, wringing her hands in the extremity of mental agony. "My dear, let us still hope for the best.
When one motor only is being used, the pitch is lowered until the propellers revolve at the speed which they would attain if both engines were in operation. This adjustment of the propeller pitch to the most economical engine revolutions is a distinctive characteristic, and contributes to the efficiency and reliability of the Parseval dirigible to a very pronounced degree.
MARINE REPTILES. In the ocean, reptiles occupied the place now held by the aquatic mammals, such as whales and dolphins, and their form and structure were similarly modified to suit their environment. A powerful tail, whose flukes were set vertical, and the lower one of which was vertebrated, served as propeller, while a large dorsal fin was developed as a cutwater.
"You've taken so much trouble to make it, and poor William's drowned!" Brian laughed. "Oh, we can get her out again," he said. "I think she must have been leaking where the propeller shaft goes through her stern." If it had been summer one of the boys would probably have rolled up his trousers and waded into the water to recover the boat. As it was, they had to improvise some form of drag.
I ought to get a few hundred more revolutions per minute out of the motor with the way I've adjusted the magneto. Rad, you and Ned hold back, while I turn the engine over." The youth and the colored man grasped the rear supports of the long, tail-like part of the monoplane while Tom stepped to the front to twist the propeller blades.
The plane at the speed of 30 miles is at an angle of 15 degrees, the body B of the machine being horizontal, and the weight C suspended directly below the supporting surfaces. It will be understood that in order to effect a change in the position of the machine, the forward end ascends, as shown by the dotted line A. Action when Propeller ceases to pull.
We reached Havana on the 18th, with nothing to vary the monotony of an ordinary sea-voyage, except off Hatteras we picked up one woman and twenty men from open boats, who had just abandoned a propeller bound from Baltimore to Charleston which foundered.
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