Show BACK YARD PLANE NOW A A. POSSIBILITY DAYTON 0 O. Oct 30 Announce Announce Announcement ment from McCook aviation field that successful tests have havo been made by a reversible airplane propeller means according to officials that the day of the back yard airplane is 18 here With the new airplanes airplanes' can land nd and be brought to a a. stop within fifty feet by actual actual test officials b said I IThe The new device will also Increase the climbing speed of an airplane 40 per cent ann and permit of higher altitude flying feet being a possible limit Seth Hart lIart of ot Los Angeles is the inventor inventor the of-the of ot the |