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Skylab-II 3.0; An SLS three Barrow LH2 tank derived space station with an attached Tranqulity derived module with a Bigalow/water shroud for radiation sheltor

June 16, 2017

(A)(1) Skylab-II with 3 barrows and two domes instead of just 2 SLS propellant tank barrows should fit in an SLS 10 meter payload fairing SLS payload planners guide 

Space Launch System Core Stage

 

The planner’s guide states that the 10 m diameter PLF concept has 15.32 Meters cylindrical while the proposed Skylab-II is 11.5 meters high.So it appears a 3 barrow Skylab-II would fit in this space.Please note that on page 58 of the SLS payload planners guide there is another 11.12 meters tapered payload fairing geometry.Is it possible to fit an ISS module on top of the SLS propellant tanks? The tapered geometry makes it possible to make a radiation shelter as proposed in the Skylab-II paper; “a possible solution is to place an ISS US Lab size module within the Skylab II leaving approximately 2 meters between shells (Figure 6). If the void were filled with water the mass of water alone would be 389 mt. For water mass only, this would take 4-5 launches using the 95 mt SLS” Skylab-II proposal 

“Skylab II; Making a Deep Space Habitat from a Space Launch System Propellant Tank”  Griffen & Smitherman Et al

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This image is of Centaur lofting Cygnus to the ISS

We propose that the 3 Barrows Skylab-II with an attached ISS module on the forward dome of the LH2 could be enshrouded within a Bigalow that would inflate on orbit.Distributed launch of water would follow.If we are using a 8 meter long ISS module then the Bigalow inflatable would encapsulate that prior to inflation and fit in the remaining tapered 11.12 meters of the SLS 10  meter circumference payload fairing.****

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The Diameter of the ISS Tranquility module is 4.48 meters and an inflated Bigalow B330 is 6.7 meters so this leaves 2.22 meters for salt water and Kelp as a radiation barrier.A Bigalow enshrouded  ISS module atop the Skylab-II should be less volume than the proposed 389 metric tons of the ISS module inside a Skylab-II proposal

In our Rappolee flowers proposal, we suggested payload fairings with attached mesh as a deployed solar array; SLS 10 meter fairing that’s a total of 27.43 meters on a side for deployed fairings still attached to the spacecraft so 27.43 x 2 = 54.86 meters diameter of our Rappolee flower

r=27.43 m =2363.749706365 m2     172.34777297594 m c The ISS USOC solar arrays are 1500 M 2 since the Payload fairings are concave in shape then 2363 M 2 is under the true surface area.

weight

(1) Skylab-II 47,432 Kg? Full capability C 2 Figure 15 20140012883

(2) ISS Tranquility module 19,000 Kg

(3) B330 20,000 Kg

(4) SLS 10 meter fairing brought to LEO Kg?

(4) solar voltaic cells lining 10-meter fairing and deployable mesh Rappolee (flower) Kg?

SLS has payload ranges  70  90 130 metric tons to LEO

SLS first stage O2 tank has another 9.5 meter barrow segment and this sounds like our 3 barrow proposal? so 11.5 meters plus 9.5 meters? “The current SLS upper stage H2 tank weighs 4200 kg (9240 lbm). This is an exceptionally lightweight pressure vessel; equivalent to two sport utility vehicles. The simplest approach is to use a tank off the production line then outfit it as a DSH. Figure 12 shows other options include using the first stage oxygen tank or the end domes of the first stage hydrogen tank welded to a shortened barrel section. Either approach offer the same diameter with the oxygen tank providing a 9.5 m (373 in.) barrel section and thus greater volume than the upper stage hydrogen tank”

pressure vessel; equivalent to two sport utility vehicles. The simplest approach is to use a tank off the production line then outfit it as a DSH. Figure 12 shows other options include using the first stage oxygen tank or the end domes of the first stage hydrogen tank welded to a shortened barrel section. Either approach offer the same diameter with the oxygen tank providing a 9.5 m (373 in.) barrel section and thus greater volume than the upper stage hydrogen tank”

 

 

According to this Youtube, each SLS LH2 Barrow is 6.7056 Meters X 5 barrows plus two domes 135 feet total or 41.148 meters.A 41 meter space station payload wil not fit in the NASA space vehicle assembly building.

26.44 meters is the 10 meter PLF concept so subtracting 2 LH2 Barrows makes for a 3 segment plus 2 domes Skylab-II just a little too big for the 10 meter PLF

 

**** A discovery, a paper from the NASA NTRS archive that speaks of a “full capability Skylab-II or C-2 it is 16.5 meters tall and would need the 10 meter PLF? Habitat Concepts for Deep Space Exploration

This is close I think to the Skylab-II MAX that I blogged about earlier last year.Except Skylab MAX is an entire SLS LH2 tank inserted into LEO and this would be a 40 meter tall payload on top of the SLS!

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From → SLS/Skylab-II

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