Summer hours: mid-May to mid-September. 10 a.m. - 4 p.m. Possible early closing due to weather conditions. This is a walking tour of planes so weather is a factor - try to come early in mid-summer heat. Closed Mon. Tues. and Thurs. Winter: by appointment only. See some of the last remaining examples of World War II's mighty bombers and restored and retired transport aircraft and aerial firefighting planes.