SpaceShipOne Back in Action 200
JoeSilva writes "After a 3 month wait,
Scaled Composites' SpaceShipOne is
back in the skies above Mojave! Not only is it patched up from a failed landing gear, it's got a 'thermal protection system' installed.
Looks like high temp insulation on the leading edges. Also they have a picture of it with 'the rocket motor for the flight 13p'. This was the 12th SpaceShipOne flight."
Already slashdotted (Score:-1, Informative)
Combined White Knight / SpaceShipOne Flight Tests
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Combined Flight Test Legend:
C = Captive Carry
L = Launch
G = Glide
P = Powered
The first letter represents the intended mission for the flight and the second letter, if present, represents the actual mission flown. For example, first glide will for the space ship will be 03G. If the flight aborts or doesn't release for whatever reason, the nomenclature becomes 03GC.
Flight 49L / 12G
Date: 11 MAR 04 Flight Time: 1.3 hours / 18 mins 30 secs
White Knight Pilot: Binnie White Knight Copilot: Stinemetze
White Knight Flt Engineer:
SpaceShipOne Pilot: Siebold
High Chase-Starship Pilot: Karkow
Low Chase-Extra Pilot: Melvill / Coleman
Objectives:
The twelfth flight of SpaceShipOne. Objectives included: pilot proficiency, reaction control system functionality check and stability and control and performance of the vehicle with the airframe thermal protection system installed. This was an unpowered glide test.
Results:
Slashdot's editors are facists.
Launch conditions were 48,500 feet and 125 knots. All systems performed as expected and the vehicle landed successfully while demonstrating the maximum cross wind landing capability.
Flight 43L / 11P
Date: 17 Dec 03 Flight Time: 1.2 hours / 18 mins 10 secs
White Knight Pilot: Siebold White Knight Copilot: Bird
White Knight Flt Engineer:
SpaceShipOne Pilot: Binnie
High Chase-Starship Pilot: Karkow
Low Chase-Extra Pilot: Melvill / Coleman
Objectives:
The eighth flight of SpaceShipOne and first powered flight. 15 second burn of the rocket motor and supersonic flight. Motor light off at altitude and inflight engine performance. Vehicle handling qualities through transonics and feather performance from altitude.
Results:
Launch conditions were 47,900 feet and 112 knots. Motor light off was achieved at 44,400 feet and 0.55M. Burnout occurred at 1.2M and apogee was 67,800 feet. There was no noted flight control flutter or buzz during the climb. Feather recovery exhibited a +/-30 roll initially and then settled down into the familiar falling bathtub mode. The wing was de-feathered and locked by 35,000 feet. A nominal landing pattern was flown but touchdown caused the left main gear to collapse and the vehicle rolled to a stop off the runway in the soft sand. Although the damage was not major, repairs are expected to take approximately three weeks to complete.
Flight 42L / 10g
Date: 4 Dec 03 Flight Time: 1.3 hours / 13 mins 14 secs
White Knight Pilot: Siebold White Knight Copilot: Stinemetz
White Knight Flt Engineer:
SpaceShipOne Pilot: Binnie
High Chase-Starship Pilot: Karkow
Low Chase-Extra Pilot: Melvill / Coleman
Objectives:
The seventh glide flight of SpaceShipOne and new pilot check out. Full functional check of the propulsion system by cold flowing nitrous oxide. Completed airspeed and positive and negative G-envelope expansion.
Results:
Launch conditions were 48,400 feet and 115 knots. All propulsion components, displays and functionality performed as designed. The feather was extended after a 4G pull-up to the vertical at 24,500 feet and rudder used to induce sideslip and yaw rates while "going-over-the-top". The vehicle recovered to a stable attitude and descent after only a single oscillation. The landing pattern was flown following established procedures resulting in a satisfactory touchdown.
Flight 41L/09G
Date: 19-Nov-03 Flight Time: 2.1 hours / 12 mins 25 secs
White Knight Pilot: Binnie White Knight Copilot: Bird
White Knight Flt Engineer:
SpaceShipOne Pilot: Melvill
High Chase-Starship Pilot: Siebold
Low Chase-Duchess Pilot: Coleman / Stinemetze
Objectives:
The sixth glide flight of SpaceShipOne.
For those who don't know (Score:5, Informative)
WOOHOO!!!
Check out the test updates here. [scaled.com]
AFAIK, these guys are the closest to winning the X-Prize- go team!!!
Photos (Score:5, Informative)
Re:X Prize is impossible (Score:4, Informative)
Re:mirror / karma whoring (Score:4, Informative)
i know, i suck at slashdot
Re:Lucky 13? (Score:5, Informative)
That's not to say they couldn't go to space unofficially, before going for the big money; in fact they probably will, as part of their test series.
--riney
Re:For those who don't know (Score:4, Informative)
There's no hand to tip because they already did that. SpaceShipOne had flown it's first powered flight back in December [slashdot.org].
Stop modding this up (Score:1, Informative)
Heat shielding is minor compared to orbital craft (Score:5, Informative)
The kinetic energy required to accelerate a gallon of gasoline to orbital speed is more than the chemical energy contained in the gasoline.
By contrast, "merely" lifting something up 100km doesn't require much energy at all.
So, er, no, leading-edge heat shields ought to be just fine. Fiberglass or carbon-fiber composites might even survive a flight or two without any shielding at all.
Re:heat shielding (Score:3, Informative)
The Space Shuttle comes in a lot faster and through far more atmosphere (Think angle of attack, not just vertical height). These guys are just barely getting out into "space", and aren't anywhere near the altitude or velocity required to get to even low earth orbit, so they don't need much heat shielding at all.
Of course LEO isn't a requirement for the X-prize.
Why yes, I am a rocket scientist.
Re:Global Flyer (Score:5, Informative)
Talk about similar designs... Burt Rutan designed Voyager.
Re:missing flights? (Score:3, Informative)
10G 4 Dec 03
09G 19-Nov-03
08G 14-Nov-03
Maybe they've updated the page since you looked, but they're all clearly there right now.
Re:heat shielding (Score:3, Informative)
If you read thier site (after the slashdotting subsides) you will see that the wings fold up 90 degrees during reentry which gives them a very large amount of drag, while maintaining a stable angle of decent.
Re:Lucky 13? (Score:5, Informative)
Re:Already slashdotted (Score:2, Informative)
[...]
Results:
Slashdot's editors are facists.
Launch conditions were 48,500 feet and 125 knots. All systems performed as expected and the vehicle landed successfully while demonstrating the maximum cross wind landing capability.
If it's for the good of the community, then don't put in your personal opinion in the middle of the post.
There may have been more random crap in there, this was the first one I saw. Feel free to remod the karma whore appropriately.
Re:heat shielding (Score:3, Informative)
Spaceship One will only generate temperatures of about 1000 degrees, and since they don't need to use an angle of attack of 40 degrees like the shuttle, they only need to protect the leading edge. The max speed is only about mach 3.5, and the decelleration is 70 seconds. The shuttle on the other hand decellerates from orbital velocity for 20 minutes.
Re:Needed: Improved Fuels (Score:5, Informative)
The 1970's NERVA nuclear rocket program managed to get about twice the Isp of our best chemical rockets with a decent amount of thrust. Ion drives might give you an order of magnitude improvement over chemical rockets, but they don't have the thrust to be used in launch vehicles.
The only propulsion system I've seen proposed that could realistically produce 2 to 3 orders of magnitude increase in efficiency is the Orion drive. The government doesn't like the idea of building hundreds of small, clean nukes, though. Greenpeace gets a bit riled up about it, too.
Of course, if I had my way, they'd be welcome to protest right at the launch site.
Re:Lucky 13? (Score:3, Informative)
With the results and proof that nothing has knocked SSO out of the contest, I do think that is perfectly possible for them to do this.
NeoThermic
Re:Heat shielding is minor compared to orbital cra (Score:5, Informative)
The energy content of gasoline is about 42e6 J/kg.
Orbital velocity (at the surface of the earth) is about 8000 m/s. Kinetic energy of 1 kg at 8000 m/s is 32e6 J. (That is, you need about 32 MJ/kg)
However for those who want the whole story, the parent to this is correct: to get all that energy out of the kg of gasoline, you *also* need about 2.8 kg oxygen. Gasoline-oxygen gets you about 11 MJ/kg, which is about a third of what you need to hit orbital velocity.
To get to 100 km altitude, you need only 0.96 MJ/kg, which is no problem for gasoline-oxygen.
Re:Despite what it looks like... (Score:5, Informative)
Re:Armadillo Dreamin' (Score:5, Informative)
Three people not necessary (Score:5, Informative)
The ship only has to have accomodations for three people. The rules allow for substituting ballast for the passenger's weight and letting the single pilot go up alone. The relevant rule [xprize.com] is
Re:Armadillo Aerospace (Score:4, Informative)
Re:Photos (Score:3, Informative)
Re:Heat shielding is minor compared to orbital cra (Score:2, Informative)
For LEO (200 km), circular orbit velocity is 7789 m/s. KE is 30.3 MJ. PE for 200 km altitude (from earth's surface to orbit) is 60.7 MJ. If you launch at the equator, prograde, then you gain 464 m/s, for an intial KE of 0.1 MJ.
So total energy required to transport 1 kg to 200 km LEO from stationary at earth's equator, is 90.9 MJ.
Of course, if you're burning the fuel along the way the energy requirement drops as mass decreases, and you also have to add in oxidizer mass, but I don't know the equations for that.
Re:Global Flyer (Score:3, Informative)
Re:Minimal info (Score:2, Informative)
http://scaled.com/projects/tierone/New_Index/news