Popular Science Mont lily 



417 



HAN GAR. S- 



i 



Power house wtiere 

 current Is qeneraled 



Repair -ihedf 



Fbwerful electric lampi set in two shallow trencher 

 covered with heavy non-breakable plate (^larr 



LANDING G-R.OUND 200 '^ds. 



I 



< 500 ^ds. y! 



' \i'H^ \Jli4/ ).*'V,^ if^'^'fiJty nV'''*^ .v^''''//, yW,/,^ 



^ I o |— 3; o |— I o> I— I o %—l o |— 5; o 1— I o I 



^''V'ri'r •'^'/'i'';^ '■'/im-'f" 'Wirt*^ '''•"/n'\"'* ■'■"/r;'^'" %,iiiS;'^ 



70O yds. 



GASOLINE FLAR.es 

 Tin qasketi containinq raqs 

 and rope fed '»/ith qasoline 



General arrange- 

 ment of a German 

 aerodrome showing 

 the position of the 

 gasoline flares and 

 the trenches cover- 

 ed with unbreaka- 

 able plate glass 

 through which elec- 

 tric lights shine 



E 



Pole 20 Teet hiqh 

 with red llqht on 

 top -(electric) 



the Germans, not content with the gaso- 

 line flares, dug two shallow trenches, both 

 five hundred yards long and set two hun- 

 dred yards apart inside the "L." These 

 they lined with bright metal to serve as a 

 reflector. A row of powerful electric 

 lights was set in each trench. Over the 

 top, heavy, unbreakable plate-glass was 

 laid on a level with the surface of the 

 ground. The pilot has only to glide down 



on top of the glass in order to make a good 

 landing. If the power-plant should break 

 down, so that no current can be obtained 

 for the lamps, then the flares can be used. 

 The system betrays itself, however. 

 The Allies fly over the illuminated aero- 

 drome at night and drop bombs upon it. 

 As a result, the Germans have had to 

 use their lights only intermittently, and 

 in some cases they had to abandon them. 



are placed covered with heavy, unbreakable plate-glass. The pilots have simply to follow the 

 light and to land on the glass in safety. In addition to electric lights, gasoline flares are used 



