Author Topic: From HL-20 to Dream Chaser, the long story of a little spaceplane  (Read 25833 times)

Offline GClark

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Giuseppe,

First of all, thank you for this.  Very well done.

A couple of suggestions:

1 - On slide 6, the school should be NC A&T (North Carolina A&T).

2 - I noticed you did not include either the origin of Spiral, the Tsybin PKA, or the sub-scale BOR-1, -2, -3, or -6?

V/R,

Offline archipeppe68

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Thanks a lot for your suggestions GClark.

1 - I take a note on this, find out info about the famous HL-20 was quite difficult and I misunderstood the University name, my bad..

2 - I was tempeted to include the whole Spiral development family, but it lead to a too much complex slide, even graphically, so I choose to left behind those information since I reputed they were slightly off topic (regarding the HL-20/Dream Chaser development history).

Anyway thanks again.

Ciao
Giuseppe

Giuseppe,

First of all, thank you for this.  Very well done.

A couple of suggestions:

1 - On slide 6, the school should be NC A&T (North Carolina A&T).

2 - I noticed you did not include either the origin of Spiral, the Tsybin PKA, or the sub-scale BOR-1, -2, -3, or -6?

V/R,


Offline GClark

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I understand.  It is quite the development tree, to be sure.

I live in Southeastern Virginia and I'd never heard of NC A&T either until I read about the HL-20 test article.

As I said, very nice work.  Much appreciated.

Offline john smith 19

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Having a single provider would defeat the biggest advantage of commercial crew which is redundancy.

I think the competition between 3 providers may have been quite helpful as well.  :)

However just because going single provider would defeat that advantage does not mean is not how it will end up.

Decision making has not always been sensible.  :(

But to return to topic...
"Solids are a branch of fireworks, not rocketry. :-) :-) ", Henry Spencer 1/28/11  Averse to bold? You must be in marketing."It's all in the sequencing" K. Mattingly.  STS-Keeping most of the stakeholders happy most of the time.

Offline yg1968

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Very cool.  Just curious for people's opinion, but what are the chances that Dream Chaser actually makes it to crewed flights?
Various sources have stated that there will likely only one provider chosen to deliver crew and erioladastra has stated that Dream Chaser is behind Beoing and SpaceX.

Actually, NASA has left open the possibility of certifying two commercial crew systems even if they end up using only one of them for CTS.
« Last Edit: 01/04/2013 11:06 PM by yg1968 »

Offline Rocket Science

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Let's not forget about the little known "Yellowbird" that very few people  ever write about. I see it as the beginning of the concept for a reusable taxi to an orbital space station.

http://forum.nasaspaceflight.com/index.php?topic=27178.0
"The laws of physics are unforgiving"
~Rob, Physics instructor, aviator, vintage auto racer

Offline archipeppe68

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Here it is the updated slide 8 since I've done a couple of errors (LaRC not DFRC while it was developed in 1993 rather than 1997).

I wanna thanks Dr. Ted Talay to allow me correcting the HL-42 infos.


Ciao
Giuseppe
« Last Edit: 05/19/2013 11:13 AM by archipeppe68 »

Offline Lobo

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Here it is the updated slide 8 since I've done a couple of errors (LaRC not DFRC while it was developed in 1993 rather than 1997).

I wanna thanks Dr. Ted Talay to allow me correcting the HL-42 infos.


Ciao
Giuseppe


Yea, be interesting to think about an alternative history where HL-20, and then HL-42 was developed to fly axially on some type of ELV, specifically to service a space station.
Would have been a much more moderate first stab at reusability and space planes than going from Apollo to the Shuttle.


Offline archipeppe68

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Yea, be interesting to think about an alternative history where HL-20, and then HL-42 was developed to fly axially on some type of ELV, specifically to service a space station.
Would have been a much more moderate first stab at reusability and space planes than going from Apollo to the Shuttle.


I agree.

If HL-20/42 would put into service, Shuttle would be retired earlier. No Columbia loss and for sure HL-42 would be in service still today.
 
As side effect no gap between Shuttle retirement and next commercial crew service and also no U.S. need for Soyuz seats (which cost so much!!). Probably HL-42 would also serve as lifeboat instead of the planned X-38 and instead of the current Soyuz capsules.

Offline CitabriaFlyer

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Much has been made about Dream Chaser's advantages in terms of being able to land at a benign environment on many runways around the world but I have not read anything about its performance during a boost phase.  In the event of an engine shutdown during the boost phase does Dream Chaser have a better chance of getting to an East Coast runway and NOT dumping the crew into the North Atlantic?

Offline JBF

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Much has been made about Dream Chaser's advantages in terms of being able to land at a benign environment on many runways around the world but I have not read anything about its performance during a boost phase.  In the event of an engine shutdown during the boost phase does Dream Chaser have a better chance of getting to an East Coast runway and NOT dumping the crew into the North Atlantic?

It has been studied with the HL-20. Do a search on "Launch pad abort of the HL-20 lifting body"  I can't seem to find a copy available for free. Anyone have a real link?

"In principle, rocket engines are simple, but thatís the last place rocket engines are ever simple." Jeff Bezos

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