Author Topic: SNC Dream Chaser DISCUSSION Thread  (Read 424980 times)

Offline Rocket Science

  • Senior Member
  • *****
  • Posts: 7481
  • Maker of physicists and engineers…
  • Liked: 1884
  • Likes Given: 4362
Re: SNC Dream Chaser DISCUSSION Thread
« Reply #20 on: 07/16/2012 09:46 PM »
Would it possible to drop launch the DC from an aircraft at some point down the line?
You would need something along the lines of Stratolaunch plus booster stages...
“All engineering experiments generate valuable data, the failures are the ones that yield the most”
Rob

Offline BrightLight

  • Full Member
  • ****
  • Posts: 1275
  • Northern New Mexico
  • Liked: 165
  • Likes Given: 179
Re: SNC Dream Chaser DISCUSSION Thread
« Reply #21 on: 07/16/2012 10:44 PM »
Would it possible to drop launch the DC from an aircraft at some point down the line?
You would need something along the lines of Stratolaunch plus booster stages...
So, would Stratolaunch et al., be more cost effective then Atlas V?
Which one is safer?

Offline Rocket Science

  • Senior Member
  • *****
  • Posts: 7481
  • Maker of physicists and engineers…
  • Liked: 1884
  • Likes Given: 4362
Re: SNC Dream Chaser DISCUSSION Thread
« Reply #22 on: 07/16/2012 10:50 PM »
Would it possible to drop launch the DC from an aircraft at some point down the line?
You would need something along the lines of Stratolaunch plus booster stages...
So, would Stratolaunch et al., be more cost effective then Atlas V?
Which one is safer?
There is only one choice at this time for both safety and cost between the two, Atlas V…

“Actuality always trumps potentiality”… ;)
“All engineering experiments generate valuable data, the failures are the ones that yield the most”
Rob

Offline Helodriver

  • Full Member
  • ****
  • Posts: 838
  • Liked: 4201
  • Likes Given: 412
Re: SNC Dream Chaser DISCUSSION Thread
« Reply #23 on: 07/16/2012 11:11 PM »
If the nose skid actuator were built in such a way to provide extension and retraction forces, the skid would make a very effective speedbrake for control of descent rate and approach speed once in aerodynamic flight.

Offline Star One

  • Senior Member
  • *****
  • Posts: 6347
  • UK
  • Liked: 1014
  • Likes Given: 146
Re: SNC Dream Chaser DISCUSSION Thread
« Reply #24 on: 07/17/2012 01:28 PM »
Would it possible to drop launch the DC from an aircraft at some point down the line?
You would need something along the lines of Stratolaunch plus booster stages...

Thanks. I thought I had read there was some kind of plan to launch it from a future version of the White Knight.
« Last Edit: 07/17/2012 01:30 PM by Star One »

Offline Rocket Science

  • Senior Member
  • *****
  • Posts: 7481
  • Maker of physicists and engineers…
  • Liked: 1884
  • Likes Given: 4362
Re: SNC Dream Chaser DISCUSSION Thread
« Reply #25 on: 07/17/2012 01:34 PM »
Would it possible to drop launch the DC from an aircraft at some point down the line?
You would need something along the lines of Stratolaunch plus booster stages...

Thanks. I thought I had read there was some kind of plan to launch it from a future version of the White Knight.
Yes, you are correct for the test flight phase, but on the current WK2... :)
http://www.parabolicarc.com/2012/02/13/cool-images-sierra-nevadas-dream-chaser/
« Last Edit: 07/17/2012 01:38 PM by Rocket Science »
“All engineering experiments generate valuable data, the failures are the ones that yield the most”
Rob

Offline zerm

  • Hypergolic cartoonist
  • Full Member
  • ****
  • Posts: 1317
    • Klyde Morris dot com
  • Liked: 32
  • Likes Given: 8
Re: SNC Dream Chaser DISCUSSION Thread
« Reply #26 on: 07/20/2012 06:11 PM »
If the nose skid actuator were built in such a way to provide extension and retraction forces, the skid would make a very effective speedbrake for control of descent rate and approach speed once in aerodynamic flight.


Such equipment would probably cause an un-needed weight penalty as well as an un-needed addition of a series of systems/ sub-systems that could fail. Simple and lightweight is better.

Offline Rocket Science

  • Senior Member
  • *****
  • Posts: 7481
  • Maker of physicists and engineers…
  • Liked: 1884
  • Likes Given: 4362
Re: SNC Dream Chaser DISCUSSION Thread
« Reply #27 on: 07/20/2012 06:41 PM »
If the nose skid actuator were built in such a way to provide extension and retraction forces, the skid would make a very effective speedbrake for control of descent rate and approach speed once in aerodynamic flight.


Such equipment would probably cause an un-needed weight penalty as well as an un-needed addition of a series of systems/ sub-systems that could fail. Simple and lightweight is better.
I agree with you Wes. The HL-20 was tested with vaious combinations of control sufaces to act also as speed brakes. We may yet see something like a split rudder in it's final configuation....

~Robert
“All engineering experiments generate valuable data, the failures are the ones that yield the most”
Rob

Offline BrightLight

  • Full Member
  • ****
  • Posts: 1275
  • Northern New Mexico
  • Liked: 165
  • Likes Given: 179
Re: SNC Dream Chaser DISCUSSION Thread
« Reply #28 on: 07/27/2012 03:00 PM »
screen capture from video (around 49:35) dated 7/26/12 shows the crew access tower at LC-41 for either CST-100 or DC.

Online Orbiter

  • Senior Member
  • *****
  • Posts: 2114
  • Florida
  • Liked: 335
  • Likes Given: 832
Re: SNC Dream Chaser DISCUSSION Thread
« Reply #29 on: 07/28/2012 11:56 PM »
Out of curiosity, does SNC plan on Dream Chaser to utilize TAL abort sites in the unlikely event they are necessary? Haven't heard it addressed.

Orbiter
Attended space missions: STS-114, STS-124, STS-128, STS-135, Atlas V "Curiosity", Delta IV Heavy NROL-15, Atlas V MUOS-2, Delta IV Heavy NROL-37, SpaceX CRS-9, SpaceX JCSAT-16, Atlas V GOES-R.

Offline Rocket Science

  • Senior Member
  • *****
  • Posts: 7481
  • Maker of physicists and engineers…
  • Liked: 1884
  • Likes Given: 4362
Re: SNC Dream Chaser DISCUSSION Thread
« Reply #30 on: 07/29/2012 01:03 AM »
Out of curiosity, does SNC plan on Dream Chaser to utilize TAL abort sites in the unlikely event they are necessary? Haven't heard it addressed.

Orbiter
Any city airport with a 7000' runway should suffice for any landing...
“All engineering experiments generate valuable data, the failures are the ones that yield the most”
Rob

Online Orbiter

  • Senior Member
  • *****
  • Posts: 2114
  • Florida
  • Liked: 335
  • Likes Given: 832
Re: SNC Dream Chaser DISCUSSION Thread
« Reply #31 on: 07/29/2012 01:20 AM »
Out of curiosity, does SNC plan on Dream Chaser to utilize TAL abort sites in the unlikely event they are necessary? Haven't heard it addressed.

Orbiter
Any city airport with a 7000' runway should suffice for any landing...

True, but they really can't land it anywhere they please overseas without permission. Maybe I should rephrase as will Dream Chaser use TAL or will they just ditch it in the event of a failure going uphill?

Orbiter
Attended space missions: STS-114, STS-124, STS-128, STS-135, Atlas V "Curiosity", Delta IV Heavy NROL-15, Atlas V MUOS-2, Delta IV Heavy NROL-37, SpaceX CRS-9, SpaceX JCSAT-16, Atlas V GOES-R.

Offline zt

  • Member
  • Posts: 89
  • Liked: 10
  • Likes Given: 13
Re: SNC Dream Chaser DISCUSSION Thread
« Reply #32 on: 07/29/2012 01:27 AM »
How can the Dream Chaser be transported back to the launch/processing site after landing at some random airport? It can't take off on it own, it doesn't fit on a truck (is that right?), and AFAIK it doesn't have a special transporter plane and mounting harness.

Offline Rocket Science

  • Senior Member
  • *****
  • Posts: 7481
  • Maker of physicists and engineers…
  • Liked: 1884
  • Likes Given: 4362
Re: SNC Dream Chaser DISCUSSION Thread
« Reply #33 on: 07/29/2012 01:28 AM »
Out of curiosity, does SNC plan on Dream Chaser to utilize TAL abort sites in the unlikely event they are necessary? Haven't heard it addressed.

Orbiter
Any city airport with a 7000' runway should suffice for any landing...

True, but they really can't land it anywhere they please overseas without permission. Maybe I should rephrase as will Dream Chaser use TAL or will they just ditch it in the event of a failure going uphill?

Orbiter
I say this as a pilot. If the declare a "mayday", permissision will be granted to land in any friendly nation. The TAL sites are still there but it will not need all the support crew convoy like Shuttle did the "safe" the vehicle.
“All engineering experiments generate valuable data, the failures are the ones that yield the most”
Rob

Offline Rocket Science

  • Senior Member
  • *****
  • Posts: 7481
  • Maker of physicists and engineers…
  • Liked: 1884
  • Likes Given: 4362
Re: SNC Dream Chaser DISCUSSION Thread
« Reply #34 on: 07/29/2012 01:28 AM »
How can the Dream Chaser be transported back to the launch/processing site after landing at some random airport? It can't take off on it own, it doesn't fit on a truck (is that right?), and AFAIK it doesn't have a special transporter plane and mounting harness.
WK2
“All engineering experiments generate valuable data, the failures are the ones that yield the most”
Rob

Offline Jason1701

  • Senior Member
  • *****
  • Posts: 2238
  • Liked: 70
  • Likes Given: 39
Re: SNC Dream Chaser DISCUSSION Thread
« Reply #35 on: 07/29/2012 01:34 AM »
How can the Dream Chaser be transported back to the launch/processing site after landing at some random airport? It can't take off on it own, it doesn't fit on a truck (is that right?), and AFAIK it doesn't have a special transporter plane and mounting harness.
WK2

That would likely require a special agreement with Virgin, as all WK2s should be in regular use by the time DC flies. I wonder if one will be forthcoming.

Offline Rocket Science

  • Senior Member
  • *****
  • Posts: 7481
  • Maker of physicists and engineers…
  • Liked: 1884
  • Likes Given: 4362
Re: SNC Dream Chaser DISCUSSION Thread
« Reply #36 on: 07/29/2012 01:36 AM »
How can the Dream Chaser be transported back to the launch/processing site after landing at some random airport? It can't take off on it own, it doesn't fit on a truck (is that right?), and AFAIK it doesn't have a special transporter plane and mounting harness.
WK2

That would likely require a special agreement with Virgin, as all WK2s should be in regular use by the time DC flies. I wonder if one will be forthcoming.
Skycrane then...
“All engineering experiments generate valuable data, the failures are the ones that yield the most”
Rob

Offline manboy

  • Senior Member
  • *****
  • Posts: 2082
  • Texas, USA, Earth
  • Liked: 122
  • Likes Given: 539
Re: SNC Dream Chaser DISCUSSION Thread
« Reply #37 on: 07/29/2012 01:39 AM »
Out of curiosity, does SNC plan on Dream Chaser to utilize TAL abort sites in the unlikely event they are necessary? Haven't heard it addressed.

Orbiter
Any city airport with a 7000' runway should suffice for any landing...

True, but they really can't land it anywhere they please overseas without permission. Maybe I should rephrase as will Dream Chaser use TAL or will they just ditch it in the event of a failure going uphill?

Orbiter
Most likely the former.

How can the Dream Chaser be transported back to the launch/processing site after landing at some random airport? It can't take off on it own, it doesn't fit on a truck (is that right?), and AFAIK it doesn't have a special transporter plane and mounting harness.
I'm guessing by boat.
"Cheese has been sent into space before. But the same cheese has never been sent into space twice." - StephenB

Offline manboy

  • Senior Member
  • *****
  • Posts: 2082
  • Texas, USA, Earth
  • Liked: 122
  • Likes Given: 539
Re: SNC Dream Chaser DISCUSSION Thread
« Reply #38 on: 07/29/2012 01:45 AM »
How can the Dream Chaser be transported back to the launch/processing site after landing at some random airport? It can't take off on it own, it doesn't fit on a truck (is that right?), and AFAIK it doesn't have a special transporter plane and mounting harness.
WK2

That would likely require a special agreement with Virgin, as all WK2s should be in regular use by the time DC flies. I wonder if one will be forthcoming.
Skycrane then...
Skycrane doesn't have the range to transport it across the Atlantic.
« Last Edit: 07/29/2012 01:45 AM by manboy »
"Cheese has been sent into space before. But the same cheese has never been sent into space twice." - StephenB

Offline Rocket Science

  • Senior Member
  • *****
  • Posts: 7481
  • Maker of physicists and engineers…
  • Liked: 1884
  • Likes Given: 4362
Re: SNC Dream Chaser DISCUSSION Thread
« Reply #39 on: 07/29/2012 01:47 AM »
How can the Dream Chaser be transported back to the launch/processing site after landing at some random airport? It can't take off on it own, it doesn't fit on a truck (is that right?), and AFAIK it doesn't have a special transporter plane and mounting harness.
WK2

That would likely require a special agreement with Virgin, as all WK2s should be in regular use by the time DC flies. I wonder if one will be forthcoming.
Skycrane then...
Skycrane doesn't have the range to transport it across the Atlantic.
Once again WK2...
“All engineering experiments generate valuable data, the failures are the ones that yield the most”
Rob

Tags: