TAKIXG Ol'l- ()¥ AKROPl-AXES. 



245 



Thereby the h)ad of ])eti()l may be reduced (iiid smalleit 

 machines may be used.* 



AVith regard to (3), as far as I know, all such device,'-^ 

 of forced draug-ht into the engine that have been tried under 

 European conditions have not been found to give extra horse 

 power commensurate Avith their extra weight. It is, however, 

 a question worthy of consideration Avhether under the different 

 conditions of this country some such device may not be worth 

 while adopting. 



* It is interesting to compare the recent flight of Mr. Bert Hinkler 

 on liis Baby Avro (35 h.p. (ireen engine) from London to Turin Avithout 

 a stop. The distance (600 miles) is about the same as the Bulawayo- 

 Pretoria st?"etch. On this wonderful flight, wliich included the crossing 

 of the Alps. 25 gallons of petrol were carried and only 20 gallons xised. 

 Compare this with the 400 gallons of petrol on the Bulawayo flight. 



Fit 



