Quote from: john smith 19 on 07/15/2017 09:22 am...The X38 was slated to have a "flush mount" ADS with more pressure sensing pipes to cope with the surface geometry effects of being mounted in the nose. I think the X37b also uses such a system. In principal these systems can operate to much higher Mach numbers, giving a much better idea of aerodynamic forces on the vehicle. I'm not sure if the X37b has been remote piloted during its landings or if this ability to more accurately generate air data has made that unnecessary. I'm guessing some of the future vehicles like the SR-72 and any Reaction Engines Limited derivatives might use something like the BAE LASSI system, unless it's still 5 years away by the time those programs go into full development. That's assuming that technology solves some of the high mach issues. It might be coming too late for XS-1...http://www.baesystems.com/en/blog/lassi-laser-air-speed-sensing-instrument
...The X38 was slated to have a "flush mount" ADS with more pressure sensing pipes to cope with the surface geometry effects of being mounted in the nose. I think the X37b also uses such a system. In principal these systems can operate to much higher Mach numbers, giving a much better idea of aerodynamic forces on the vehicle. I'm not sure if the X37b has been remote piloted during its landings or if this ability to more accurately generate air data has made that unnecessary.
(snip)Both such systems would be very short range, and hence more "stealthy" than a UV laser, which would be very alien in the night sky.
Florida Todayreporting that Boeing is most likely negotiating with Space Florida to launch XS-1 from CCAFS, most likely either from LC-16 or -20:http://www.floridatoday.com/story/tech/science/space/2017/10/09/state-talks-bring-new-launch-system-space-coast/747875001/
Quote from: Ronsmytheiii on 10/10/2017 10:40 pmFlorida Todayreporting that Boeing is most likely negotiating with Space Florida to launch XS-1 from CCAFS, most likely either from LC-16 or -20:http://www.floridatoday.com/story/tech/science/space/2017/10/09/state-talks-bring-new-launch-system-space-coast/747875001/Huh. Where are they going to land the booster?
Quote from: envy887 on 10/11/2017 12:21 amQuote from: Ronsmytheiii on 10/10/2017 10:40 pmFlorida Todayreporting that Boeing is most likely negotiating with Space Florida to launch XS-1 from CCAFS, most likely either from LC-16 or -20:http://www.floridatoday.com/story/tech/science/space/2017/10/09/state-talks-bring-new-launch-system-space-coast/747875001/Huh. Where are they going to land the booster?Skid strip and SLF are the already reserved options as of a while ago. Also the mentions Pads were announced a mere week after the XS-1 Boeing announcement so none of this is new information.
Quote from: russianhalo117 on 10/11/2017 03:17 amQuote from: envy887 on 10/11/2017 12:21 amQuote from: Ronsmytheiii on 10/10/2017 10:40 pmFlorida Todayreporting that Boeing is most likely negotiating with Space Florida to launch XS-1 from CCAFS, most likely either from LC-16 or -20:http://www.floridatoday.com/story/tech/science/space/2017/10/09/state-talks-bring-new-launch-system-space-coast/747875001/Huh. Where are they going to land the booster?Skid strip and SLF are the already reserved options as of a while ago. Also the mentions Pads were announced a mere week after the XS-1 Boeing announcement so none of this is new information.It has enough crossrange to enter the atmosphere at Mach 10+ going downrange, turn completely around, and glide back to the Cape?
https://spaceflightnow.com/2017/06/13/boeing-darpa-to-base-xs-1-spaceplane-at-cape-canaveral/Boeing, DARPA to base XS-1 spaceplane at Cape CanaveralQuoteA reusable suborbital spaceplane the size of a business jet being developed by Boeing and the Defense Department’s research and development arm could be launching and landing at Cape Canaveral in 2020, officials said after the defense contractor won a competition last month to design and test the vehicle.QuoteThe spacecraft booster would return to land at one of two runways on Florida’s Space Coast: Kennedy Space Center’s Shuttle Landing Facility, a three-mile-long landing strip, or the Skid Strip at Cape Canaveral Air Force Station.Quote“We conducted trade studies with Blue Origin in the first phase of the program,” Sampson wrote in an email to Spaceflight Now. “Boeing selected the Aerojet Rocketdyne engine for this next phase as it offers a flight proven, reusable engine to meet the DARPA mission requirements.”QuoteAerojet Rocketdyne said it will provide two engines for the XS-1 program with “legacy shuttle flight experience to demonstrate reusability, a wide operating range and rapid turnarounds.”QuoteThe Phantom Express booster stage will have advanced, lightweight composite cryogenic tanks to hold the super-cold propellants feeding the AR-22 engine. Hybrid metallic-composite wings and control surfaces on the spaceplane will be fitted with “third-generation thermal protection” to withstand the rigors of hypersonic flight and re-entry temperatures of more than 2,000 degrees Fahrenheit (1,100 degrees Celsius), according to DARPA and Boeing.
A reusable suborbital spaceplane the size of a business jet being developed by Boeing and the Defense Department’s research and development arm could be launching and landing at Cape Canaveral in 2020, officials said after the defense contractor won a competition last month to design and test the vehicle.
The spacecraft booster would return to land at one of two runways on Florida’s Space Coast: Kennedy Space Center’s Shuttle Landing Facility, a three-mile-long landing strip, or the Skid Strip at Cape Canaveral Air Force Station.
“We conducted trade studies with Blue Origin in the first phase of the program,” Sampson wrote in an email to Spaceflight Now. “Boeing selected the Aerojet Rocketdyne engine for this next phase as it offers a flight proven, reusable engine to meet the DARPA mission requirements.”
Aerojet Rocketdyne said it will provide two engines for the XS-1 program with “legacy shuttle flight experience to demonstrate reusability, a wide operating range and rapid turnarounds.”
The Phantom Express booster stage will have advanced, lightweight composite cryogenic tanks to hold the super-cold propellants feeding the AR-22 engine. Hybrid metallic-composite wings and control surfaces on the spaceplane will be fitted with “third-generation thermal protection” to withstand the rigors of hypersonic flight and re-entry temperatures of more than 2,000 degrees Fahrenheit (1,100 degrees Celsius), according to DARPA and Boeing.
Here is an interesting article on XS-1 and other related topics: "DARPA Ties XS-1 Military Space Plane Project to National Security":https://www.space.com/38558-darpa-spaceplane-will-protect-national-security.html?
Quote from: yg1968 on 10/25/2017 12:35 pmHere is an interesting article on XS-1 and other related topics: "DARPA Ties XS-1 Military Space Plane Project to National Security":https://www.space.com/38558-darpa-spaceplane-will-protect-national-security.html?2020... I predict that the program will face some "minor" delays and cost overruns, pushing it past 2020. By then a new administration will seize the opportunity to cancel it. Nothing will have been achieved other than a giant waste of tax dollars. But nobody will care and 8 years later, another administration will do another program like this. Large defense contractors need their contracts.
Quote from: envy887 on 10/11/2017 03:25 amQuote from: russianhalo117 on 10/11/2017 03:17 amQuote from: envy887 on 10/11/2017 12:21 amQuote from: Ronsmytheiii on 10/10/2017 10:40 pmFlorida Todayreporting that Boeing is most likely negotiating with Space Florida to launch XS-1 from CCAFS, most likely either from LC-16 or -20:http://www.floridatoday.com/story/tech/science/space/2017/10/09/state-talks-bring-new-launch-system-space-coast/747875001/Huh. Where are they going to land the booster?Skid strip and SLF are the already reserved options as of a while ago. Also the mentions Pads were announced a mere week after the XS-1 Boeing announcement so none of this is new information.It has enough crossrange to enter the atmosphere at Mach 10+ going downrange, turn completely around, and glide back to the Cape?I think the Mach 10 thing is just a bizarre demo requirement for single-stage suborbital point-to-point flights, isn't it?Among expendable TSTOs, Atlas V and Delta IV have staging velocities in that ballpark, but this is frequently argued to be a higher than optimal staging velocity even for expendables. Why would a flyback booster want to take on an aggressive staging velocity like this?
I think the Mach 10 thing is just a bizarre demo requirement for single-stage suborbital point-to-point flights, isn't it?
Among expendable TSTOs, Atlas V and Delta IV have staging velocities in that ballpark, but this is frequently argued to be a higher than optimal staging velocity even for expendables. Why would a flyback booster want to take on an aggressive staging velocity like this?
I think the Mach 10 thing is just a bizarre demo requirement for single-stage suborbital point-to-point flights, isn't it?Among expendable TSTOs, Atlas V and Delta IV have staging velocities in that ballpark, but this is frequently argued to be a higher than optimal staging velocity even for expendables. Why would a flyback booster want to take on an aggressive staging velocity like this?
Speculative. This isn’t the most complex of programs and is entirely doable within the timeframe given by a company like Boeing and their experience in these areas.