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seruriermarshal said:X-37B Orbital Test Vehicle-3 Lands at Vandenberg AFB
;D
quellish said:seruriermarshal said:X-37B Orbital Test Vehicle-3 Lands at Vandenberg AFB
;D
Intriguing nozzle is still intriguing
sferrin said:You mean it being offset or something else? I also thought this discoloration was interesting.
DSE said:quellish said:sferrin said:You mean it being offset or something else? I also thought this discoloration was interesting.
That's consistent with previous flights, the bay door TPS may just pick up more soot or oxidation on reentry.
Or possibly visualization of the flow heated by a detached shock wave off the wing leading edge at the root?
Archibald said:Does anybody knows why and when did they swapped the AR-2/3 keroxide engine for plain old hypergolics ? (sorry if that point has been treated before in the thread!)
New experiments
The Air Force Rapid Capabilities Office has collaborated with several partners to test new experiments on this fourth flight for the X-37B program.
The forthcoming mission will test the performance of an experimental propulsion system jointly developed by the Air Force Research Laboratory and Space and Missile Systems Center. In addition, the X-37B craft will carry a NASA advanced materials investigation.
“We’re very pleased with the experiments lined-up for our fourth OTV Mission OTV-4,” Walden said. “We’ll continue to evaluate improvements to the space vehicle’s performance, but we’re honored to host these collaborative experiments that will help advance the state-of-the-art for space technology.”
TomS said:Given that the two orbits are steeply inclined to each other, their relative velocities would be very high even if there was a relatively close approach. A kinetic kill vehicle would need far too much delta-v to make an intercept from one to the other. And in the immensely improbable chance that there was an intercept, the impact would have shattered the North Korean satellite into tiny pieces. Since it was seen to be intact (albeit tumbling) after that point, we can discount the possibility.
Also, the X-37B launch was scheduled long in advance of the North Korean launch. How could the US have known that this launch would work and not the earlier windows? If they'd been even an hour or two off, that "close" approach might have been half a planet apart instead.
starviking said:TomS said:Given that the two orbits are steeply inclined to each other, their relative velocities would be very high even if there was a relatively close approach. A kinetic kill vehicle would need far too much delta-v to make an intercept from one to the other. And in the immensely improbable chance that there was an intercept, the impact would have shattered the North Korean satellite into tiny pieces. Since it was seen to be intact (albeit tumbling) after that point, we can discount the possibility.
Also, the X-37B launch was scheduled long in advance of the North Korean launch. How could the US have known that this launch would work and not the earlier windows? If they'd been even an hour or two off, that "close" approach might have been half a planet apart instead.
Could some kind of electronic attack be a possibility?
bobbymike said:Or is that totally science fiction?
bobbymike said:I was thinking of something that could launch out of the payload bay, fly and attach to a satellite and then a small rocket would fire driving the satellite out of orbit or even back into the atmosphere to burn up? Then no debris and it looks like a sat failure.
Modify one of these?
https://www.youtube.com/watch?v=LC97wdQOmfI
Or is that totally science fiction?
starviking said:TomS said:Given that the two orbits are steeply inclined to each other, their relative velocities would be very high even if there was a relatively close approach. A kinetic kill vehicle would need far too much delta-v to make an intercept from one to the other. And in the immensely improbable chance that there was an intercept, the impact would have shattered the North Korean satellite into tiny pieces. Since it was seen to be intact (albeit tumbling) after that point, we can discount the possibility.
Also, the X-37B launch was scheduled long in advance of the North Korean launch. How could the US have known that this launch would work and not the earlier windows? If they'd been even an hour or two off, that "close" approach might have been half a planet apart instead.
Could some kind of electronic attack be a possibility?
fredymac said:Nobody seems to be able to identify what type of payload would be worth the cost of return. The argument
quellish said:fredymac said:Nobody seems to be able to identify what type of payload would be worth the cost of return. The argument
Huh? How about risk reduction for a many-billions of dollars program?
The X-37B is a reusable, returnable satellite bus. It is ideal for testing technologies that are high technical risk in an operationally relevant space environment.
For example, the space-deployable membrane optics of DARPA MOIRE could be tested using X-37B and brought back for inspection. Did the system deform over 300 days? Did debris damage it? What could be improved before more money is spent on the program?
quellish said:fredymac said:Nobody seems to be able to identify what type of payload would be worth the cost of return. The argument
Huh? How about risk reduction for a many-billions of dollars program?
The X-37B is a reusable, returnable satellite bus. It is ideal for testing technologies that are high technical risk in an operationally relevant space environment.
For example, the space-deployable membrane optics of DARPA MOIRE could be tested using X-37B and brought back for inspection. Did the system deform over 300 days? Did debris damage it? What could be improved before more money is spent on the program?
fredymac said:If I were a program manager for a publicly disclosed development effort and I wanted to conduct a space based hardware test, I wouldn't seek out a classified launch system.
quellish said:fredymac said:If I were a program manager for a publicly disclosed development effort and I wanted to conduct a space based hardware test, I wouldn't seek out a classified launch system.
.....Like METIS?
Flyaway said:Strangely low orbit & inclination, far different from the previous flights. Probably significant of some element it's testing & certainly not anything to do with the two payloads that were announced.
antigravite said:Steve Mushynsky made interesting comments on this discussing spaceflighow's article: this flight would seemingly be testing a new type of propulsion system whose familly first conceptualized way back in 1958 by Demetriades. The breakthrough engine would be the so called ELF or "Electrodeless Lorentz Force Thruster" funded by DoD and MSNW Corp.
ouroboros said:antigravite said:Steve Mushynsky made interesting comments on this discussing spaceflighow's article: this flight would seemingly be testing a new type of propulsion system whose familly first conceptualized way back in 1958 by Demetriades. The breakthrough engine would be the so called ELF or "Electrodeless Lorentz Force Thruster" funded by DoD and MSNW Corp.
Demetriades, as in the PROFAC guy? But one iteration of PROFAC was an atmosphere skimming orbital ramjet hypersonic cruiser...
sferrin said:Almost forget those things are up there they stay up so long. Wonder if they'll ever have both up at the same time.