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Official Armadillo Q&A thread
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Space Station Commander ![]() ![]()
Joined: Sat May 22, 2004 8:59 am
Posts: 578 Location: Zurich |
John Carmack wrote: The test flight went perfectly, so I did a mid-week update: http://www.armadilloaerospace.com/n.x/Armadillo/Home/News?news_id=263 Incredible, to see that video of your vehicle going up out of shot and then come down again ... it didn't seem real ... amazing job. Was there any negative "impact" on the landing configuration at 1 m/s? With a larger vehicle do you intend to reduce landing speed further? _________________ Per aspera ad astra |
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Spaceflight Trainee ![]()
Joined: Tue Jun 15, 2004 10:26 am
Posts: 44 Location: Switzerland |
Incredible video! It looked like a very controlled touch-down.
Two small questions: 1. what's the whistling sound on warm-up? 2. is it possible to mount a camera on it like on the previous vehicle (the "lander")? |
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Spaceflight Trainee ![]()
Joined: Tue Dec 23, 2003 12:32 pm
Posts: 46 |
Absolutely awesome flight... Glad to see a N. Texas space entrepreneur succeed. Anybody else remember the Beal corp?
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Space Walker ![]()
Joined: Tue Apr 13, 2004 9:42 am
Posts: 191 Location: Cider country, England. |
That video is brilliant. Well done team Armadillo.
_________________ It was like that when I found it. Honest. |
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Space Station Commander ![]()
Joined: Mon Oct 06, 2003 9:22 pm
Posts: 858 Location: New York, NY |
beautiful..... just beautiful. SS1 may be a prettier ship, but there's a certain elegance to seeing something take off and land well while completely under automatic control.
_________________ Cornell 2010- Applied and Engineering Physics Software Developer Also, check out my fractals |
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Moon Mission Member ![]()
Joined: Tue Jul 15, 2003 8:46 pm
Posts: 1204 Location: Kapellen, Antwerp, Belgium, Europe, Planet Earth, the Milky Way Galaxy |
I have a question maybe also other people could tell me;
With a powered landing as shown on the latest movie, if the rocket would come from orbit. Won't this stop the reentry problem in the earth's atmosphere ? I think if scaled wants to go higher they are very limited.. but if I'm right. with Armadillo their concept, it seems they won't have a height limitation.. do they ? except from fuel storage of course.. Btw, the latest movie really looked promising. _________________ Heavier-than-air flying machines are impossible. - Lord Kelvin, 1892 |
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Space Walker ![]()
Joined: Tue Apr 13, 2004 9:42 am
Posts: 191 Location: Cider country, England. |
From the little I understand, I don't believe a VTOL ability can be used to prevent re-entry heating. If I do understand this right, you have to use the thrust in the opposite direction to that of travel, therefore adjacent to the Earth's surface, to reduce speed to leave orbit. It is this action that leads to the descent into the atmosphere while still travelling at a fair old whack. I can only imagine you would need two off-set main engines and a shed load of fuel to carry out a controlled descent to sub-orbital flight, if indeed it is even possible. Dr Keith probably knows.
_________________ It was like that when I found it. Honest. Last edited by luke.r on Wed Jun 16, 2004 2:27 pm, edited 1 time in total. |
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Spaceflight Enthusiast ![]()
Joined: Wed Jun 16, 2004 2:12 pm
Posts: 1 |
I know this is a QA thread - I don't have any pressing questions - but I had to offer my congratulations to the Armadillo team on a great boosted hop! Also, thank you John for the frequent and regular public updates - they are highly appreciated.
Best of luck. |
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Space Station Commander ![]() ![]()
Joined: Sat May 22, 2004 8:59 am
Posts: 578 Location: Zurich |
Sigurd wrote: I have a question maybe also other people could tell me; With a powered landing as shown on the latest movie, if the rocket would come from orbit. Won't this stop the reentry problem in the earth's atmosphere ? I think if scaled wants to go higher they are very limited.. but if I'm right. with Armadillo their concept, it seems they won't have a height limitation.. do they ? except from fuel storage of course Actually JC is the one who should answer this ... but in the meantime I'll give it a whack ... I imagine they would have to deal with increased heat shielding like anyone else wanting to return from higher up, and if you are going to burn fuel to reduce descent speed ... well, that's a lot of extra fuel to lug up there in the first place. Besides, I thought Carmack wants to switch his engines entirely off during descent until landing preps. Basically, what luke.r said already ... although I'm not sure if it's considered impossible to use thrusters to slow descent in order to offset heating, I think it's just accepted that for the mass of fuel required for it to work you can use heat shielding instead and save (a lot of?) weight. _________________ Per aspera ad astra |
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Rocket Constructor ![]()
Joined: Tue Apr 06, 2004 8:42 am
Posts: 9 |
That movie certainly brought a big grin to my face!
Looks like the Japanese people working on the RVT project might be *very* impressed by this! Your team is inspiring thousands of people, I'm sure. Burt's approach, while very elegant, still has somewhat of a big corporation aura around it, you guys are more the "kids in the shed" type, and i think a lot of youngsters are simply lapping it up. Future engineers will quote your project as a mayor incentive for them entering college, I'm sure. Thank you John. For getting this team together! For making it work! |
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Space Station Member ![]() ![]()
Joined: Mon Apr 12, 2004 4:16 am
Posts: 322 |
That new testflght movie.. all I can say is "WOW!"
I feel like the DC-X has been reincarnated. |
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Spaceflight Trainee ![]()
Joined: Mon Jun 14, 2004 6:14 pm
Posts: 42 Location: Florida |
luke.r wrote: From the little I understand, I don't believe a VTOL ability can be used to prevent re-entry heating. If I do understand this right, you have to use the thrust in the opposite direction to that of travel, therefore adjacent to the Earth's surface, to reduce speed to leave orbit. It is this action that leads to the descent into the atmosphere while still travelling at a fair old whack. I can only imagine you would need two off-set main engines and a shed load of fuel to carry out a controlled descent to sub-orbital flight, if indeed it is even possible. Dr Keith probably knows. Forward firing rocket motors are an effective way to reduce re-entry heating. NASA has looked at the method for use during aerobraking maneuvers on interplanetary missions. The limit of course is the size of the propellant tanks. |
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Spaceflight Trainee ![]()
Joined: Mon Jun 14, 2004 6:14 pm
Posts: 42 Location: Florida |
Dr_Keith_H wrote: Sigurd wrote: I have a question maybe also other people could tell me; With a powered landing as shown on the latest movie, if the rocket would come from orbit. Won't this stop the reentry problem in the earth's atmosphere ? I think if scaled wants to go higher they are very limited.. but if I'm right. with Armadillo their concept, it seems they won't have a height limitation.. do they ? except from fuel storage of course Actually JC is the one who should answer this ... but in the meantime I'll give it a whack ... I imagine they would have to deal with increased heat shielding like anyone else wanting to return from higher up, and if you are going to burn fuel to reduce descent speed ... well, that's a lot of extra fuel to lug up there in the first place. Besides, I thought Carmack wants to switch his engines entirely off during descent until landing preps. Basically, what luke.r said already ... although I'm not sure if it's considered impossible to use thrusters to slow descent in order to offset heating, I think it's just accepted that for the mass of fuel required for it to work you can use heat shielding instead and save (a lot of?) weight. http://www.designation-systems.net/dusr ... print.html In regards to atmospheric heating it is informative to consider the case of the Sprint missile, the second stage of which attained Mach 10+ at altitudes below 100,000 feet. |
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Rocket Constructor ![]()
Joined: Thu Jun 17, 2004 12:01 am
Posts: 8 Location: Austin, TX |
Your work is very personally inspiring.
My question is this: In making an x-prize attempt, do you intend to send up three people, or are you going to send one person and a payload of wieght that is equivalent to two additional people? Though I may be incorrect, I remember reading somewhere that a single pilot and a sufficient payload would satisfy the requirements for the x-prize. I haven't verified that fact, however. Secondly, though I am notably inexperienced in phyisics theory, I thought I had read somewhere that certain factors in a physical scenario change with scale. If this is true, do you think you will have to do significant work on the software that controls the landing when you test it on the full size vehicle? Thank you for your time and effort in regards to publishing reports and making media available for download. Watching private space travel take its first steps is a very profound and invigorating experience. |
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Space Station Commander ![]()
Joined: Mon Oct 06, 2003 9:22 pm
Posts: 858 Location: New York, NY |
Forrest wrote: In making an x-prize attempt, do you intend to send up three people, or are you going to send one person and a payload of wieght that is equivalent to two additional people? Though I may be incorrect, I remember reading somewhere that a single pilot and a sufficient payload would satisfy the requirements for the x-prize. I haven't verified that fact, however. you are correct. in fact, i'm pretty sure all the teams only plan on having one person on the flights, due to the fact that the ship will not be fully tested when they occur. _________________ Cornell 2010- Applied and Engineering Physics Software Developer Also, check out my fractals |
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