Lockheed Martin SR-72 have the same range, with entry into service by 2030. The SR-72 follows the US Air Force's hypersonic road map for developing a hypersonic strike weapon by 2020, and a penetrating ISR aircraft by 2030. At the time of the concept's unveiling, Lockheed Martin had engaged in talks with government officials, but has not secured funding for the demonstrator or engine. On 13 November 2013, Air Force Chief of Staff General Mark Welsh revealed that the service was interested in the SR-72's hypersonic capabilities, but had not spoken with Lockheed Martin about the aircraft. Its high speed appeals to the
Lockheed Martin X-44 (UAV) Lockheed Martin X-44 (UAV) The Lockheed Martin X-44 is an unmanned aerial vehicle (UAV) technology demonstrator built by the Lockheed Martin Skunk Works. After the 1999 cancellation of the RQ-3 Darkstar, Lockheed Martin decided to build a technology demonstrator for a potential family of flying wing UAVs that could be used for combat and non-combat roles. The resulting X-44 (designation previously allocated to the X-44 MANTA) was built in 1999 and first flew in 2001, representing an interim design between the Darkstar and P-175. However, Lockheed Martin kept the X-44 under wraps until February 2018. The X-44 is reportedly made