X-15 flights were short; each lasted about ten minutes. So that the rocketplane could use all its fuel for acceleration, it was carried beneath the wing of a NASA B-52 to 45,000 feet, where it was ...

which was a modified variant of the X-15 that carried external fuel tanks for extended range, to a speed of Mach 6.7, or 7,674 miles per hour. This flight made the X-15 the fastest manned ...

The EPA has issued a waiver allowing the nationwide sale of E15 gasoline this summer, which may lead some owners to wonder if ...

The X-15 is now of great interest to the public and ... the distance between the two aircraft. Page 90. Scene 202: Fuel is not measured in inches. Correct terminology is “minimum fuel.” ...

Midwestern states, including Iowa and South Dakota, already had waivers in place to allow for summer sales of fuel blended with 15% ethanol, also known as E15. EPA’s decision Monday waives the ...