North American Aviation X-15A-2 with ablative coating and external tanks Published on October 2, 2012 in 3 October 1967Full resolution (1280 × 1242) Next → North American Aviation X-15A-2 56-6671, with ablative coating and external propellant tanks. (NASA)X-15A-2 with full scale ablative and external tanks installed parked in front of hanger. 4 Aug. 67