Quote from: woods170 on 11/05/2019 01:38 pmD. The number of flights by the time the contracts are awarded has ZERO influence on the contract award. Even the number of flights at the time of the proposals being due is of little-to-no value. It is all about HOW the contractor proposes to convince NASA that it will be safe to fly on the contractors vehicle(s).The Source selection document says that Boeing's proposed launcher has "demonstrated reliability" while SpaceX's launch vehicle has "flight heritage". It then questions Boeing's proposal for an alternative launch vehicle as that would negate the advantages of the Atlas V baseline.
D. The number of flights by the time the contracts are awarded has ZERO influence on the contract award. Even the number of flights at the time of the proposals being due is of little-to-no value. It is all about HOW the contractor proposes to convince NASA that it will be safe to fly on the contractors vehicle(s).
This is what it had to say about SNC's proposal:QuoteI also agreed with the significant strength for using a launch vehicle that has demonstrated reliability and well-known failure modes and operating environments, which facilities an integrated abort system for a crew system and results in a safer launch vehicle.https://www.nasa.gov/sites/default/files/files/CCtCap-Source-Selection-Statement-508(3).pdf
I also agreed with the significant strength for using a launch vehicle that has demonstrated reliability and well-known failure modes and operating environments, which facilities an integrated abort system for a crew system and results in a safer launch vehicle.
When will the Crew Dragon static test take place?
https://twitter.com/spacex/status/1194745251480498177QuoteFull duration static fire test of Crew Dragon’s launch escape system complete – SpaceX and NASA teams are now reviewing test data and working toward an in-flight demonstration of Crew Dragon’s launch escape capabilities
Full duration static fire test of Crew Dragon’s launch escape system complete – SpaceX and NASA teams are now reviewing test data and working toward an in-flight demonstration of Crew Dragon’s launch escape capabilities
Sorry if this has already been covered somewhere as I haven't read the entire thread.After separation, will the LV be destroyed by the FTS or will it attempt a landing on a lower suborbital trajectory?
Quote from: spacetraveler on 11/16/2019 06:02 pmSorry if this has already been covered somewhere as I haven't read the entire thread.After separation, will the LV be destroyed by the FTS or will it attempt a landing on a lower suborbital trajectory?Elon said it would almost certainly be fragged by aerodynamic forces after the abort. IIRC. Don't know what the plan is if it survives. Most likely no recovery attempt.
Quote from: punder on 11/16/2019 06:46 pmQuote from: spacetraveler on 11/16/2019 06:02 pmSorry if this has already been covered somewhere as I haven't read the entire thread.After separation, will the LV be destroyed by the FTS or will it attempt a landing on a lower suborbital trajectory?Elon said it would almost certainly be fragged by aerodynamic forces after the abort. IIRC. Don't know what the plan is if it survives. Most likely no recovery attempt.With all the extra mass from the non-functional second stage, I don't think it's possible to recover the booster.
So if this has been asked before...apologies!
At the point where Dragon and thetrunk separate, the first and second stage would become unstable and break up approximately 2–4 milesdown range from the shore
Off-nominal Scenario 3: For early aborts where Falcon 9 velocity, and hence dynamic pressure,are still relatively low, if no autonomous flight termination rules are violated, Falcon 9 mightimpact the ocean’s surface intact. For aborts closer to the abort time frame, an intact impact isunlikely. In the event of Falcon 9 intact impact, propellant is expected to be consumed in thehigher yield explosion resulting from propellant mixing upon impact.
QuoteAt the point where Dragon and thetrunk separate, the first and second stage would become unstable and break up approximately 2–4 milesdown range from the shoreIt says FTS will be installed, but doesn't say it would be used unless the vehicle strays outside of the approved flight path.QuoteOff-nominal Scenario 3: For early aborts where Falcon 9 velocity, and hence dynamic pressure,are still relatively low, if no autonomous flight termination rules are violated, Falcon 9 mightimpact the ocean’s surface intact. For aborts closer to the abort time frame, an intact impact isunlikely. In the event of Falcon 9 intact impact, propellant is expected to be consumed in thehigher yield explosion resulting from propellant mixing upon impact.
If the booster then RUD's post-abort, we end up with a scattered debris field...
Quote from: gongora on 11/18/2019 05:53 pmQuoteAt the point where Dragon and thetrunk separate, the first and second stage would become unstable and break up approximately 2–4 milesdown range from the shoreIt says FTS will be installed, but doesn't say it would be used unless the vehicle strays outside of the approved flight path.QuoteOff-nominal Scenario 3: For early aborts where Falcon 9 velocity, and hence dynamic pressure,are still relatively low, if no autonomous flight termination rules are violated, Falcon 9 mightimpact the ocean’s surface intact. For aborts closer to the abort time frame, an intact impact isunlikely. In the event of Falcon 9 intact impact, propellant is expected to be consumed in thehigher yield explosion resulting from propellant mixing upon impact.Hope we have cameras pointing at all the action, including "higher yield explosion" if it occurs!
Will the second stage be fueled to keep the rocket at the usual mass?
