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Japan's HTV spacecraft follow-on: HTV-R (Returnable)


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#1 DocM

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Posted 08 November 2013 - 19:49

Now that JAXA has announced the coming end if the existing HTV cargo carrier for ISS program they're working on the next phase: HTV-R (HTV-Returnable), which would be capable of ISS cargo return instead of being disposable.

Take a close look at the new alternative layout - we've seen this layout before (SpaceX's Dragon) :)

Makes one wonder if they chose this configuration because it's pretty much shown bootstrap-able into a crewed configuration.

Concept PDF: http://archive.ists....f/2013-g-16.pdf

HTV-R concept
htv-r1.png

htv-r2.jpg

Capsule concept
jaxa-crew-capsule.jpg


#2 SALSN

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Posted 11 November 2013 - 14:31

Wow, if I saw that last picture with out context, I would say that was the dragon capsule.



#3 Beittil

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Posted 11 November 2013 - 14:49

Wow, if I saw that last picture with out context, I would say that was the dragon capsule.

Except, this thing seems to be internally flipped upside-down compared to Dragon. (Avionics, propellant & thrusters at the top rather than the bottom of the capsule).



#4 OP DocM

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Posted 11 November 2013 - 15:13

It's not quite exact, HTV-R having a 20° sidewall angle vs. Dragon's 15°, but it's close.

That flip severely limits the main interior space vs. putting the tanks etc. in the otherwise harder to use corners below. On Dragon that lower space is also where the life support and environmental controls go. Top storage also makes for a narrow access tunnel to the hatch.

#5 SALSN

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Posted 12 November 2013 - 12:12

As far as I can remember, the thrusters are also placed a little differently.

Anyway, shouldn't we hear something more about Dragon 2 seen? I seem to remember something about more details, coming in the fall, and that is pretty much over by now?!



#6 OP DocM

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Posted 12 November 2013 - 14:45

I have a pic of the pressure vessel for the pad abort test Dragon, showing the crew hatch and deeper bottom section where the life support is. No pics of the outside yet though. I'll hunt it down.