OCR Text |
Show Motor Peculiarity That airplane motors operate more efficiently at early morning thaa at any other time is one of the mysteries of mechanics which automotive au-tomotive engineers have vainly tried to solve. It Is an established fact that for a period slightly before lawn at the earth's surface to aa hour afterward an airplane motor aperates at its highest efficiency. A ilmllar although modified effect s aoted for a like period immedlfccelj ifter sunset. Automobile motors oa the ground are affected, but la. teser degree. o |