Navy and AFPlanes Collidea*oGVAitSTOCKTON, Calif,t Dec. 2. lt;AP) βAn Air Force hospital plane and a Navy trainer were badly damaged in an unexplained ccollision at 6,000 feet near here yesterday but both limped to safe landings.Tlie .hospital plane, on a training mission from Texas with only a four-man crew aboard, landed at Travis Air Force Base minus a propel!or. The right side cf the huge 051 was badly scuffed.The Navy plane, its tail surface* and right wingtip damaged, landed at Alameda Naval Air Station, guided by an air rescue plane from Hamilton Air Force Base.Aboard the Navy plane were the pilot, Lt. J. L_ Scoggins and Lt. R. Taylor, the copilot, of Berkeley. The hospital plane, on a training mission from Brooks Air Force Base, Texas, was piloted by Capt. Leslie E. Kassebaum of Brooks.fittalsteitclt;7;ittcirnseti