id	author	title	date	pages	extension	mime	words	sentences	flesch	summary	cache	txt
51481	Ennis, William D. (William Duane)	Flying Machines Today			.txt	text/plain	33932	2050	69	AIR AND THE WIND.--Sailing Balloons.--Field and Speed 43 The supporting power of a heavier-than-air machine decreases a dirigible balloon or flying machine, the sensation is that of being The air ship is like a submarine--the dirigible balloon Wright machine had 500 square feet of wings and a speed of forty machine at ten miles per hour we should need a sail area of 8000 square _dirigible_ balloon be _PB_, the wind velocity _PV_, then the actual this possibly objectionable increase in lifting power, balloons are modern forms carry the car, motor, and propeller below the balloon total weight of the machine was nearly 1200 pounds, and its speed lifting power of an aeroplane increases as the angle of inclination The air pressure, direct and frictional resistances, and power depend The aeroplane designed for a forty mile speed may then face this wind To increase present speeds of dirigible balloons from thirty to	./cache/51481.txt	./txt/51481.txt