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Author Topic: Dream Chaser for CEV requirement  (Read 44329 times)

Offline Flyaway

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Re: Dream Chaser for CEV requirement
« Reply #90 on: December 19, 2018, 11:48:31 pm »
those appear to be cargo-only.  Any news on when they might fly crewed?

Not anytime soon the only customer contract(s) they have for is cargo.

Offline sferrin

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Re: Dream Chaser for CEV requirement
« Reply #91 on: December 20, 2018, 03:20:34 am »
those appear to be cargo-only.  Any news on when they might fly crewed?

Not anytime soon the only customer contract(s) they have for is cargo.

Are they even working on man-rating the thing?
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Offline TomS

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Re: Dream Chaser for CEV requirement
« Reply #92 on: December 20, 2018, 05:34:16 am »
those appear to be cargo-only.  Any news on when they might fly crewed?

Not anytime soon the only customer contract(s) they have for is cargo.

Are they even working on man-rating the thing?

Not much, AFAIK, although they still talk about doing it eventually and have the old engineering test article (used for glide and landing tests) in storage. 

The current configuration is probably impossible to human-rate, since it launches inside a payload shroud.


Offline sferrin

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Re: Dream Chaser for CEV requirement
« Reply #93 on: December 20, 2018, 06:33:04 am »
The current configuration is probably impossible to human-rate, since it launches inside a payload shroud.

Which is really strange as the OML still has the shape of the cockpit.
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Offline TomcatViP

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Re: Dream Chaser for CEV requirement
« Reply #94 on: December 20, 2018, 06:54:11 am »
Savings (R&D cost)

Offline Moose

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Re: Dream Chaser for CEV requirement
« Reply #95 on: December 20, 2018, 07:31:50 am »
Savings (R&D cost)
And they can point to the cargo version's performance as an indicator of how the manned DC will perform next time they're in a competition for NASA/Space Force/whatever funding.

Offline Flyaway

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Re: Dream Chaser for CEV requirement
« Reply #96 on: April 08, 2019, 11:55:40 pm »
Images on links.

https://twitter.com/SierraNevCorp/status/1115011424475127811

Quote
SNC’s Dream Chaser® spacecraft looks a little different these days. We now have more white Thermal Protection System tiles than black. Aside from protecting Dream Chaser against high re-entry temps, they’ll protect against an impact from space junk moving faster than 20,000 mph.

https://twitter.com/sierranevcorp/status/1115056679115161602

Quote
The materials that make up Dream Chaser[emoji2400] spacecraft’s Thermal Protection System tiles can survive temperatures up to 3,200F while maintaining the underlying structure temperature below 350F, protecting the spacecraft from re-entry heat.

Short video on this link.

https://mobile.twitter.com/SierraNevCorp/status/1114936030707310592
« Last Edit: April 08, 2019, 11:58:40 pm by Flyaway »

Offline Archibald

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Re: Dream Chaser for CEV requirement
« Reply #97 on: April 14, 2019, 09:28:21 am »
The X-38 was similar - it had the shape of the old *piloted* HL-10, the cockpit "hump" still included, just not to change the overall shape too much.
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Offline Mark Nankivil

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Re: Dream Chaser for CEV requirement
« Reply #98 on: April 14, 2019, 04:34:56 pm »
Protecting from junk moving faster than 20,000 mph?!  Good luck with that....

Enjoy the Day!  Mark
« Last Edit: April 14, 2019, 04:43:47 pm by Mark Nankivil »

Offline TomS

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Re: Dream Chaser for CEV requirement
« Reply #99 on: April 14, 2019, 06:40:50 pm »
Protecting from junk moving faster than 20,000 mph?!  Good luck with that....

Enjoy the Day!  Mark

Depends on how big the object is that it can protect against.  That's a typical speed for micrometeorites and the Shuttle (for example) got hit with dust to sandgrain sized particles regularly.

Offline sferrin

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Re: Dream Chaser for CEV requirement
« Reply #100 on: Yesterday at 05:13:54 am »
Protecting from junk moving faster than 20,000 mph?!  Good luck with that....

Enjoy the Day!  Mark

Depends on how big the object is that it can protect against.  That's a typical speed for micrometeorites and the Shuttle (for example) got hit with dust to sandgrain sized particles regularly.

Saw a "rock chip" in one of the Shuttles' windscreens.  When they analyzed it it turned out to be a paint fleck from some other spacecraft.
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Offline martinbayer

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Re: Dream Chaser for CEV requirement
« Reply #101 on: Yesterday at 06:55:25 am »
The X-38 was similar - it had the shape of the old *piloted* HL-10, the cockpit "hump" still included, just not to change the overall shape too much.

The X-38 was actually based on the X-24A configuration, see https://www.nasa.gov/centers/armstrong/news/FactSheets/FS-038-DFRC.html, not the HL-10.
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Offline archipeppe

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Re: Dream Chaser for CEV requirement
« Reply #102 on: Today at 04:12:39 am »
The X-38 was similar - it had the shape of the old *piloted* HL-10, the cockpit "hump" still included, just not to change the overall shape too much.

The X-38 was actually based on the X-24A configuration, see https://www.nasa.gov/centers/armstrong/news/FactSheets/FS-038-DFRC.html, not the HL-10.

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Offline martinbayer

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Re: Dream Chaser for CEV requirement
« Reply #103 on: Today at 06:36:33 am »
Excellent overview, Archipeppe - thanks!

Martin
« Last Edit: Today at 06:42:06 am by martinbayer »
Would be marching to the beat of his own drum, if he didn't detest marching to any drumbeat at all so much.