. Annual report of the Board of Regents of the Smithsonian Institution . ruce, and is 06 feet long, 2^ feet wide,and 2^ feet high. Motor.—The motor is a 20 horsepower, water-cooled Curtiss make. Propeller.—The propeller is at the front end of the car, and is con-nected to the engine by a steel shaft. It is built up of spruce, hasa diameter of 10 feet 8 inches, with a pitch of 11 feet, and turns atthe rate of 450 revolutions per minute. A fixed vertical surface isprovided at the rear end of the car to minimize veering, and a hori-zontal surface attached to the vertical rudder at the rear tends
. Annual report of the Board of Regents of the Smithsonian Institution . ruce, and is 06 feet long, 2^ feet wide,and 2^ feet high. Motor.—The motor is a 20 horsepower, water-cooled Curtiss make. Propeller.—The propeller is at the front end of the car, and is con-nected to the engine by a steel shaft. It is built up of spruce, hasa diameter of 10 feet 8 inches, with a pitch of 11 feet, and turns atthe rate of 450 revolutions per minute. A fixed vertical surface isprovided at the rear end of the car to minimize veering, and a hori-zontal surface attached to the vertical rudder at the rear tends tominimize pitching. A double horizontal surface controlled by a leverand attached to the car in front of the engine serves to control thevertical motion and also to minimize pitching. The- position of the car very near to the gas bag is one of thefeatures of the government dirigible. This reduces the length andconsequently the resistance of the suspension, and places the pro-peller thrust near the center of resistance. Smithsonian Report, 1908.—Squier. Plate Signal Corps Dirigible No. 1, in Flight, Fort Myer, Va., August, 1908. Smithsonian Report, 1908,—Squier. Plate 8.
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Keywords: ., bookauthorsmithsonianinstitutio, bookcentury1800, bookdecade1840
