Show 00 PLANES S SET AFIRE i BY EXHAUST PIPE I I I i WASHINGTON Jan 9 Dy 9 By The The Associated Press Army Press Army air ex- ex exports ex experts ports believe that in the tho exhaust stack they have found lound the firebug largely responsible tor for the tend tend- tendency tendency ency of ot crashed planes to burst buret Into flames and which has cost many lives The much repeated flaming coffins designation ot of otI I certain old types of o army armr planes by Colonel William Mitchell arose I Crom this tendency An An air all service report said aId that I ISO 30 crash tests were conducted on obsolete airplanes It was discos discovered ered Bred that the exhaust stack was a avery avery very ery serious sellous source ot of o fire Ire and that If 1 11 it were possible to go so der de- tie sign sign an exhaust stack slack that lint hat It would IJo be cold cold old enough to prevent the self self Ignition I Ignition ot of gasoline or oil spraYEd Into the stack stock the number number would be very greatly reduced I |