not forthcoming and the project was eventually canceled in 1995. However, the SHARP gun continued to be used for high-speed tests in other areas of research, such as scramjet development. The concept of ballistic escape velocity is well proven. The largest challenge is maintaining such high velocities, because air resistance and aerothermal heating will significantly slow down any such object. See also Quicklaunch, proposed by SHARP scientist John Hunter. Non-rocket spacelaunch Project HARP Verneshot Operation Plumbbob References External links [Article about SHARP.] Fiscal and feasibility comparison of various Earth-based satellite launching systems including the SHARP from JOBS for the 21st Century. The flying mineshaft cover is discussed under the section Pascal-B from the nuclearweaponsarchive.org overview of atmospheric nuclear testing in Nevada. Space guns Research projects Non-rocket spacelaunch de:High Altitude Research Project#SHARP