U— xMr. A, lam prepared to tell you I 

 have a different course to pursue, from 

 that whicfi j'on mention. I liave discov- 

 • red a waj' to double, quadruple and raul- 

 liply the lifting capacity of an air-ship, 

 ahnost without limit. Mind you, this can 

 he accomplished without iticreasing the 

 weight or power of the motor, or weight of 

 >iny ptirt of the air-ship. You understand 

 the different motors ax we have them now 

 in their present condition, are cajiable of 

 lifting themselves into the air and many 

 times doiihle their weight. They alrewdy 

 yield r<ntficient mechiinical power to do all 

 tliis. But in all air-ships so far, the main 

 portion of the power has been wasted, 

 bncause it has never been properly applied. 

 It has not been the plans ami forms of the 

 air-ship which were ar fait, but their pro- 

 portions and inclitie surfaces ami the like. 

 It seems that these inventors or bnildeis 

 of air-ships have not understood the laws 

 upon which their inventions were based; 

 Bird rhe ru^ult is, they have nut had those 

 laws to guide them to success. It has been 

 like trying to solve a problem in mathe- 

 luatics without a rule, 



A — But Mr. B, 1 want an explanation 

 about how you are going to increase the 

 lifting capacity of your air ship without 

 increasing the power of the sustaining 

 motor. 



B — Mr. A, it is accomplished by air 

 jets of large volume, under low pressure 

 and velocity. 



A — Mr. B, do you mean to say that 

 a jet ot air of large volume under low 

 pressure and velocity, lifts a greater 

 weight than one of smaller volume with 

 high pre.^sure and velocity, with equal 

 amounts of energy consumed per second 

 in eacli case? 



B— Yes Mr. A, that is just what I mean 

 to say ; let us force a large volume of air 

 under low pressure and velocity, through 

 passagr s of large dimensions, and we are 

 on the road to success. Forxillustration, 

 we will take two air-ships exactly alike 

 in fi)rMi ami weight, but in one the nozzles 

 and aerial p.issages throitghout contain 

 greater diameters than the other. To lie 

 exact we will say they contain just eight 

 times the area of the other. A given 

 power with the enlarged area, will lift 

 just double the weight to that in the 

 other case, nor is it necessary to increase 

 strength or weiglit of the parts upon 

 which the strain of the compressed air 

 rest-*, for the reason that as the dimensions 

 of the parts are enlargeu, the air pressure 

 per ^(juare inch is reduced proportionally. . 



A — 1 understand your theory Mr. B, 

 now I ask you to prove all this. It is 

 very easy to say this is so and so, but it 

 is another thing to prove it. 



B— you are aware of the fact Mr. A, 

 that if we double the velocity of a body 



moving through the air, we will quadruple 

 its resistance. Suppose Mr. A, we have 

 two parachutes; one has an area of one 

 hundred square feet, and the other an 

 area of four hundred square feet. We 

 place on these parachutes loads which 

 make them descend at equal velocities. 

 We place on the larger one a load of one 

 hundred pounds, and in order to make 

 them descend at e(jual rates, we place on 

 the smaller one a load of twenty-five 

 pounds, for the reason that it contains 

 only one fourth the area of the larger one. 

 Now if we place a load of one hundred 

 pounds on the smaller one, this loa^l 

 will Cause it to descend at such a rate 

 that it will be constantly meeting with 

 the same resistance from the air as that 

 of the larger one at its slower velocity. 

 And this rale will be double that of the 

 larger one, f<jr the reason that we have 

 quadrupled its resistance against the air, 

 by doubling its velocity. Thus you observe, 

 it we qt\adruple the area of a parachute, 

 it is compeiU d to descend at only one half 

 that of its former rate, in order to meet 

 with the .-ame resistance. In this case 

 of the falling parachutes, the parachutes 

 thenjselves are supposed to contain equal 

 weights. 



.Suppose Mr. A, we have a combination 

 consisting of a steam engine and boiler; 

 and on the outer end of the piston 

 rod we have fixed a broad plane hav- 

 ing an area of one hundred square feet. 

 Suppose we so ar.-ange this combination 

 that the pijtoti ro(t by the action of the 

 steam, moves the plane constantly 

 v. rtically downward sidewise against the 

 air. We will call this com'iination an il- 

 lustrative air-ship. The plane being moved 

 Vertically downward, reacts against the 

 air and ttiids to lift the ship and hold it in 

 the air. Suppose this plane has to be 

 moved downward against the air, at the 

 rate of otie hundred feet per second, in 

 order to gain sufiQcient reaction to sustain 

 a weight of one hundred poutids. W^e 

 now remove this plane and replace it with 

 one having an area of four hundred square 

 feet. Now according to the laws illustrated 

 in the case of the parachutes, the engine 

 has to move this larger plane at only 

 litty feet per second against the air, in 

 order to gain sufficient reaction to sustain 

 a weight of one hundred pounds. What 

 is this we have? A plane with an area 

 of one hundred square feet, moving 

 against the air at the rate of one hundred 

 feet per second and sitstaining a weight 

 of one liuudred pounds. And in the 

 second case a plane having an area of four 

 hundred square feet, moving at the rate 

 of fifty feet per second and sustaining a 

 weight of one hundred pounds. Now in 

 the first case, the engine has to move a 

 load of one hundred pounds, at the rate 



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