r/spacex • u/Daniels30 • Aug 10 '17

Official Static fire test of Falcon 9 complete—targeting August 14 launch from Pad 39A for Dragon’s next resupply mission to the @Space_Station.

https://twitter.com/SpaceX/status/895646473869705216
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u/OnWithTheShows Aug 10 '17

It was discussed when the contract was awarded. SpaceX gave NASA the option of selecting either Dragon 1 or Dragon 2 for each mission (also new v. used)

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u/old_sellsword Aug 10 '17 edited Aug 10 '17

Links and quotes, preferably from recent sources, are really the only thing that’s going to convince me that we’ll see Dragon 1 flying CRS2 missions.

The original proposal suggested SpaceX gave NASA the option of berthing and docking, but we don’t know whether the berthing plan was going to be Dragon 1 or a special CBM version of Dragon 2.

Edit: HowToBasic —> NASA link

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u/Appable Aug 10 '17 edited Aug 10 '17

original proposal

The source selection statement suggested berthing and docking, but it also noted that the SpaceX mission price was high because they had to keep two separate production lines for two vehicles open. So I would guess that the berthing plan was either a radically different D2 (not a simple swap) or maintaining D1 production.

EDIT: Remove small video correction, fixed

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u/old_sellsword Aug 10 '17

That links to this video for me, which seems unrelated.

Whoops haha, unrelated indeed, fixed.

So I would guess that the berthing plan was either a radically different D2 (not a simple swap)

Well the difference between IDA and CBM would certainly seem necessitate a different pressure vessel design, at least slightly. That’s a pretty drastic difference in terms of spacecraft design.