. American engineer and railroad journal . or rubber cloth. Beneath it were to be hingedthree hollow legs, which might either be folded up orallowed to hang down. Strong springs inside of themwere to carry rods or feet, at the outer end of which wereto be wheels to roll over the ground. These legs were tobe so adjusted in length that the apparatus should presentan angle of incidence of about 20 to the horizon, and uponbeing put into forward motion, at the rate of about 20miles per hour by the screw, it was expected to rise uponthe air and to enter upon its llight, the latter being regu-lated b
. American engineer and railroad journal . or rubber cloth. Beneath it were to be hingedthree hollow legs, which might either be folded up orallowed to hang down. Strong springs inside of themwere to carry rods or feet, at the outer end of which wereto be wheels to roll over the ground. These legs were tobe so adjusted in length that the apparatus should presentan angle of incidence of about 20 to the horizon, and uponbeing put into forward motion, at the rate of about 20miles per hour by the screw, it was expected to rise uponthe air and to enter upon its llight, the latter being regu-lated by the horizontal tails and by the vertical rudder. The motor might be steam, electricity, or some otherprime mover, and it was estimated that 6 would berequired for an apparatus ; weighing one ton. This was avery great underestimate, forihe proposed plan of drivingthe machine over the ground by means of the aerial screwwould largely increase the resistance, and sufTicient speedcould not be obtained to rise upon the air. Ri^AR PROGRESS IN FLYING MACHINES. By O. Chanute, {CoHtinueii/rotm pa^e 30S.) The next apparatus to be noticed was thoroughly ex-perimentetl with, and years were spent in the endeavor toput it into practical operation. It was rirst patented byM. I-elix (lit Ti-inf>le, a French naval officer, in 1857, andis shown in fig. 4t ; the top figure representing an endview from the rear and the lower figure being a top consisted in two fixed wings of silk fabric, stretched bycurved spars of wood or metal, and firmly attached to a 41.—DU TEMPLE—1S57-1S77. M. Du TempU tried many experiments with modelsshaped like birds, and his patent indicates that he hadcarefully considered the question of stability, for he placesthe preponderance of weight toward the front of the car,provides for a diedral angle during llight by the flexibilityand shape of the wings, and produces a slight turning upof the rear edge by making il flexible, all muc
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectrailroadengineering
