March 4 Lockheed Concept Posted bysaemiller May 24, 2021April 26, 2021 Lockheed’s 21st Century Mach 4 airliner – Estimated 200 passengers at an altitude of 120,000 feet.
Lockheed’s 21st Century Mach 4 airliner – Estimated 200 passengers at an altitude of 120,000 feet.