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NASA's X-43D Was Designed to Hold Mach 15 — About 11,000 Miles per Hour, 3 Miles Every Second — for 30 Seconds of Powered Flight. Development Was to Begin in Fiscal Year 2005, Run 4 Years, and End in 3 Flights a Year Apart. Not One Vehicle Was Ever Built.
38+ min ago (682+ words) Thirty seconds at Mach 15 generates heat no conventional structure survives. The X-43D was not a faster X-43A. It was a new aircraft that needed active cooling, and it priced itself out....
How US Navy Nuclear Submarines Stay Underwater for Months Without Surfacing
23+ hour, 31+ min ago (476+ words) A nuclear submarine makes its own air and its own drinking water. The only two things that force it back to the surface are the food it can carry and the people aboard....
Japan's Electromagnetic Railgun Has Fired More Than 100 Shots Without Replacing Its Rails. The US Navy Spent About $500,000,000 on Its Own Railgun and Shut the Program Down in 2021.
1+ day, 3+ hour ago (709+ words) At times, the electromagnetic railgun has looked like the future of naval warfare. Replacing gunpowder and rocket propulsion with electrical currents that generate magnetic forces sufficient to accelerate a projectile down two conductive rails, the railgun promised to offer so…...
A Laser Shot Costs a Few Dollars. The US Navy Estimates the First Real Shipboard Laser Program Would Cost About $1,000,000,000 Before a Single Destroyer Is Fitted With One.
1+ day, 7+ hour ago (730+ words) The Navy’s reasons for pursuing laser weaponry are obvious. Conventional air defense systems rely on expensive physical ammunition. For example, an Arleigh Burke-class destroyer can carry roughly 90–96 missiles in its Vertical Launch System (VLS) cells. Once those missiles are depleted,…...
NASA Spent About $230,000,000 Over 8 Years and Flew the X-43A 3 Times. Its Scramjet Held Mach 9.68 for About 10 Seconds on 16 November 2004, and the Funding Ended Within Weeks — Before the Team Had Published the Results.
1+ day, 11+ hour ago (1210+ words) The X-43A set the air-breathing speed record on 16 November 2004 with a 10-second burn at Mach 9.68. Hyper-X funding ended within weeks, before the results were written up....
The US Space Force X-37B Spaceplane Is 29 Feet Long, Weighs 11,000 Pounds and Has a Payload Bay 7 Feet Long. Nobody Outside the Program Has Ever Been Told What Goes Inside It.
2+ day, 6+ hour ago (463+ words) The X-37B is 29 feet long, weighs 11,000 pounds and carries a 7-foot payload bay. The Space Force announces when it launches and when it lands, and nothing in between....
Chinese Researchers Ran the US Air Force B-21 Raider Stealth Bomber Through Their Own Simulation Software Using Nothing but Public Photographs, and Say They Found Aerodynamic Flaws in It.
2+ day, 11+ hour ago (680+ words) Months ago, Chinese aerospace researchers said they have identified potential aerodynamic and stability weaknesses in the US Air Force’s next-generation stealth bomber, the B-21 Raider. The claim comes from a study conducted at the China Aerodynamics Research and Development Centre,…...
Forget the F-35 Stealth Fighter: At 87,000,000,000 Operations Per Second, the US Air Force F-15EX Eagle II Is a Real Flying Supercomputer
3+ day, 5+ hour ago (264+ words) The F-15EX Eagle II runs a processor performing 87,000,000,000 functions a second, carries 12 missiles and flies at Mach 2.5. The stealth F-35 manages Mach 1.6, the F-22 Mach 2.25....
NASA Spent About $230,000,000 Over 8 Years on the Mach 9.6 X-43A Hypersonic Scramjet. It Flew 3 Times, the First 1 Was Destroyed by Its Own Booster, and the Engine Ran for Roughly 11 Seconds.
3+ day, 5+ hour ago (575+ words) NASA's Hyper-X program cost about $230,000,000 over 8 years and produced 3 flights. The first was destroyed. The other 2 set records no air-breathing aircraft has beaten since....
In June 1985 Russia Flew 2 Balloons Through the Sulfuric Acid Clouds of Venus. They Rode 150-Mile-an-Hour Winds for 46 Hours and 11,600 Kilometers, and No Balloon Has Flown on Another Planet Since.
3+ day, 9+ hour ago (913+ words) In June 1985, the Soviet Union did something that still sounds impossible. It flew two balloons through the clouds of another planet. Not landers built to ride out the surface, but drifting aerial probes, released high in Venus’s atmosphere into a…...