The global economic environment combined with the rapid pace of technology advancement is placing importance on reducing the cost and increasing the responsiveness of access to space systems. Based on decades of practical experience with rocket-only launch vehicles, current technology is operated close to theoretical limits and only marginal further efficiency improvement is achievable. In order to further improve the efficiency of access-to-space vehicles, new propulsion systems will be required. Airbreathing engines, and scramjets in particular, are considered the most promising alternative. Scramjets have an advantage over rocket propulsion in terms of a significantly higher specific impulse; other benefits of airbreathing propulsion for access-to-space are increased launch flexibility, such as shorter time to rendezvous with a target spacecraft, and increased launch window duration and number of opportunities. This project investigates the use of a three-stage rocket-scramjet-rocket system for transporting payloads of approximately 500 kg to a Sun Synchronous Orbit. It is believed that this mission profile meets the requirements of many missions, such as responsive surveillance of man-made and natural disasters and several earth science missions.
The US Air Force agreed to pay $3 million to a Las Vegas tanning parlor to fix a hole in one of its spacesuits. They’re fixing it so well that it will be ready for use just in time for the next space shuttle launch.
Back up your backups. Make sure you have a good copy of all your personal files and programs before you start your new job. Reinstall your operating system and make sure you have up-to-date patches.
Every time somebody asks you a question, take a minute to think about the answer before providing one. The difference between a good answer and a bad answer is about a five-word sentence: “Do you want it that way or do you want it better?”
Losing anything is always a hassle. The best advice is to keep up to speed on where your stuff is and what happened to it. Never assume that if a friend says they have something you want, it’s in their house. Just take a moment and double-check. d2c66b5586