J42 



TAKING OFF OF AKUOri-AXKS. 



Table IV. 



Heavy load, llatio of run to that required at sea-level. 



From the above results Ave see that at ]3ulawayo, foi" 

 example, with a temj)erature of 90° 1\, an aerodrome in every 

 direction nearly twice as large as under ordinary European 

 conditions Avould be required ; while at places of altitude 

 G,000 feet with a temperature of 100° F. the linear dimensions 

 of the aerodrome should be two and a half times those of the 

 aerodrome in England required for the same machine. 



lY. EaTE (JF ClIMJ! from the •AeR0])R(JME. 



Hardly second in importance to the leno'th of run to 

 take off is the rate at which the machine will ( liml) out ot' 

 the aerodrome, i^ot only has it to clear obstacles such as 

 trees on the boundary, but it must rise sufhcieptly liig-h tri 

 be out of the disturbed condition of the atmosjdiere in the 

 neighbourhood of surrounding hills and kopjes. The rate of 

 climb under different conditions of altitude and temj^erature 

 can be calculated from the cui-A-e in Fig. 8. In Figs. 4, 5, 0, 7 

 we have the curves giving the rate of climb for any ground 

 horse power per thousand pounds and for the six dift'erent 

 temperatures and four different altitudes, the curve for 

 sea-level being given in each case for purposes of com])arison. 



Calculation of the rate of climb under the different 

 conditions leads to the following results : — 



Table Y. 



Yickers-Yiniy. Light load. Total Aveight = 8,820 lbs. Rate 



of climb in feet per minute : at sea -level, 845 feet per minute. 



