Military aeroplanes, simplified, enlarged; an explanatory consideration of their characteristics, performances, construction, maintenance, and operation, specifically arranged for the use of aviators and students . for these parts. The landing gear, the construction of which we will study later,is usually fastened to the fuselage. THE STABILIZER The stabilizer, a fixed horizontal surface, at the rear of the mainwings, is rigidly fastened to the tail end of the fuselage. It is in effect a wing surface, but its function is not to assist inlifting the aeroplane; on the contrary, it is a liability
Military aeroplanes, simplified, enlarged; an explanatory consideration of their characteristics, performances, construction, maintenance, and operation, specifically arranged for the use of aviators and students . for these parts. The landing gear, the construction of which we will study later,is usually fastened to the fuselage. THE STABILIZER The stabilizer, a fixed horizontal surface, at the rear of the mainwings, is rigidly fastened to the tail end of the fuselage. It is in effect a wing surface, but its function is not to assist inlifting the aeroplane; on the contrary, it is a liability in that thepressures on it are usually negative. We have already learned how, when the angle of incidence ischanged, the center of pressure moves on the wing surfaces. If somemethod were not used to neutralize this shifting of the air forces on themain wings about the center of gravity, the aeroplane would be sounstable that flight would be impossible. Because, not only must the angle cf incidence of the aeroplanes wings be altered for varying speeds,climbs, etc., but the aeroplane is apt to run into uptrends and down-trends of air, which would change the angle of incidence of the machineto the air Difference in Angle between,, , Main Planes and Stabilizer = Longitudinal Dihedral. As the angle of incidence of the wings is changed, so is the inclination of the entireaeroplane, tail surfaces, fuselage, and all, since they are all structurally fastened together. It follows, therefore, that if we introduce a decalage, or difference in angle ofincidence between the main wings, and this auxiliary surface, called the stabilizer, suchthat the angle of the stabilizer is two or three degrees less than the angle of incidenceof the main wings, we get a dihedral angle longitudinally. This has much the same effect as a dihedral across the wings, in introducing anautomatic righting effect. For as the aeroplane tilts up, the pressure on the tail is increased, and gives anadded upward
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectairplanes, bookyear19
