Quote from: yg1968 on 10/28/2017 02:45 pmEuropean space officials outline desired contribution to Deep Space Gateway:http://spacenews.com/european-space-officials-outline-desired-contribution-to-deep-space-gateway/In that article their emphasis seems to be on a space tug, presumably SEP. Might be within their capability.
European space officials outline desired contribution to Deep Space Gateway:http://spacenews.com/european-space-officials-outline-desired-contribution-to-deep-space-gateway/
Got a link to that study? 3 months seems awful long for chemical unless they're using some fancy low energy transfer (but then 6 tons sounds low...)
Quote from: brickmack on 11/07/2017 05:28 pmGot a link to that study? 3 months seems awful long for chemical unless they're using some fancy low energy transfer (but then 6 tons sounds low...)Quick 3day transfer to DSG is about 3.7km/s, slow 3 month transfer is about 3.1 km/s.
Quote from: TrevorMonty on 11/07/2017 05:34 pmQuote from: brickmack on 11/07/2017 05:28 pmGot a link to that study? 3 months seems awful long for chemical unless they're using some fancy low energy transfer (but then 6 tons sounds low...)Quick 3day transfer to DSG is about 3.7km/s, slow 3 month transfer is about 3.1 km/s.3.1 km/s only gets it a Hohmann transfer to EML1 altitudes, how does it insert to NRHO?
Why even bother with such a slow transfer when the 3 day one only requires 600 m/sec more delta V?
Quote from: savuporo on 10/15/2017 02:32 amBob Zubrin is totally not on board. I'm shocked <video link elided -- Proponent>Thanks much -- that was actually quite interesting. Zubrin tears into DSG, pointing out, among other things, that never before in the history of planning for missions to Mars (or the moon), dating back to von Braun, has anyone said that a cis-lunar station is desirable.
Bob Zubrin is totally not on board. I'm shocked <video link elided -- Proponent>
A couple of notes on DSG:QuoteCrusan: "for the first time ever, we have refueling baselined in our human space flight architecture." Finally. Whoo hoo!! #leag2017https://twitter.com/george_sowers/status/917744545340764161QuoteJason Crusan asked how DSG is fueled. His answer: "I do not care where the fuel comes from" for Deep Space gateway. #LEAG2017 https://twitter.com/NASAWatch/status/917743640730132480
Crusan: "for the first time ever, we have refueling baselined in our human space flight architecture." Finally. Whoo hoo!! #leag2017
Jason Crusan asked how DSG is fueled. His answer: "I do not care where the fuel comes from" for Deep Space gateway. #LEAG2017