engine Beechcraft flies through was made  of thin balsa wood, except for a thicker frame for support. Stunt  pilot Frank Tallman (qv) had to fly the aircraft directly through  the center of the billboard or the thicker frame would shear off a  wing. Since the shattered wood would clog and stop both engines, the  billboard was built just off the end of the runway at the Chino (CA)  airport. After flying through the billboard, Tallman simply lowered  the landing gear and safely touched down on the runway.