A small on board nuclear power plant can provide enough electricity to manufacture methane and lox for at least a short hop to LEO.
But on a vehicle carrying 100? You need a whole different philosophy of safety, more airline, less ELV.
Quote from: john smith 19 on 08/07/2018 09:58 pmBut on a vehicle carrying 100? You need a whole different philosophy of safety, more airline, less ELV.Yes, and no For true passenger ops, you definitely need a system more dependable than any so far ever built. Achieving airliner levels of reliability is going to be a major challenge (lets not forget that the environment the vessels operate in, and the pressures and temperatures their engine tech depends on are both orders of magnitude harsher than any airliner will ever experience) but I think SpX has the best chance of anyone achieving such a lofty goal.The main issue for me, isn't the technology itself, but how the law works in the event of a tragedy.When - not if - there is a failure and lots of passengers die, the law first and foremost puts the onus on the company to PROVE that they DID EVERYTHING REASONABLE TO PREVENT THE LOSS OF LIFE.If they cannot prove that, then they will be subject to significant government penalties, which will immediately be followed by 100+ civil lawsuits from each of the estates of the deceased (and probably all the companies they represented too). And you can bet that each of those estates will be backed by the best, most expensive lawyers, because almost all passengers on BFR P2P flights are going to be 'highly cash rich' individuals.I cannot see any way for SpX to prove that they did everything possible to save human life if they are not using an abort system.Any lawyer worth his/her salt would be able to make a convincing argument that "you made one for Dragon-2, so why did you delete such an obvious safety system for BFS?"That's a horrid legal position to be in.What can you possibly say to defend against that?
Quote from: john smith 19 on 08/07/2018 09:58 pmBut on a vehicle carrying 100? You need a whole different philosophy of safety, more airline, less ELV.Yes, and no For true passenger ops, you definitely need a system more dependable than any so far ever built. Achieving airliner levels of reliability is going to be a major challenge (lets not forget that the environment the vessels operate in, and the pressures and temperatures their engine tech depends on are both orders of magnitude harsher than any airliner will ever experience) but I think SpX has the best chance of anyone achieving such a lofty goal.The main issue for me, isn't the technology itself, but how the law works in the event of a tragedy.When - not if - there is a failure and lots of passengers die, the law first and foremost puts the onus on the company to PROVE that they DID EVERYTHING REASONABLE TO PREVENT THE LOSS OF LIFE.If they cannot prove that, then they will be subject to significant government penalties, which will immediately be followed by 100+ civil lawsuits from each of the estates of the deceased (and probably all the companies they represented too). And you can bet that each of those estates will be backed by the best, most expensive lawyers, because almost all passengers on BFR P2P flights are going to be 'highly cash rich' individuals.I cannot see any way for SpX to prove that they did everything possible to save human life if they are not using an abort system.Any lawyer worth his/her salt would be able to make a convincing argument that "you made one for Dragon-2, so why did you delete such an obvious safety system for BFS?"That's a horrid legal position to be in.What can you possibly say to defend against that?The immediate follow-up point that the prosecution lawyers will make in court, is that the company chose to delete the most obvious safety system that rockets have successfully used to protect other crews, for no other reason that to increase performance and thus improve the system's economics - that they chose not to offer the ultimate protection to passengers because they put profits ahead of safety.Ouch. The press would have a field-day at SpX's expense.Regardless of whether you're a fan of SpX, or whether you like that argument or not, if you're honest wih yourself, everyone here KNOWS that's what the lawyers will ask in such a situation.SpX would have a b*tch of a time defending against that and if they can't win, the financial penalties would be vast. Probably as bad - if not worse - as Pan-Am's after Lockerbie, and those costs definitely helped to put a nail in that company's coffin. I personally do not want SpX to ever be in that situation. And that's why I will always say they still need to include a LAS in BFS, even if it does use-up 15-20 tons of the vehicle's LEO performance. To me its a no-brainer worthwhile trade to make, to protect against such an obvious existential threat to the whole company's future.Do any of the Executives really want to be sitting there a decade from now asking themselves the foolish question "why didn't we just include a LAS? The whole Mars program is in ashes now" I'd recommend going and talking with the folk who designed and operated Shuttle - with the benefit of hindsight, ask them if they'd make the same choice on whether they should have pursued a completely different design that included a LAS or not.Maybe, once they successfully fly the thing 1,000 or perhaps 100,000 times without any failures, then they could maybe consider removing the LAS. But I sure wouldn't risk the company's existence until establishing such a long-term record of safety first.Ross.
the law first and foremost puts the onus on the company to PROVE that they DID EVERYTHING REASONABLE TO PREVENT THE LOSS OF LIFE.
I'd recommend going and talking with the folk who designed and operated Shuttle - with the benefit of hindsight, ask them if they'd make the same choice on whether they should have pursued a completely different design that included a LAS or not.Maybe, once they successfully fly the thing 1,000 or perhaps 100,000 times without any failures, then they could maybe consider removing the LAS. But I sure wouldn't risk the company's existence until establishing such a long-term record of safety first.
Yeah.“I don’t care about Russian experience” = “I lost the argument.”There’s not enough spaceflight history to think we can restrict our experience to ONLY the US when it comes to safety.
Quote from: kraisee on 08/08/2018 06:10 pmI'd recommend going and talking with the folk who designed and operated Shuttle - with the benefit of hindsight, ask them if they'd make the same choice on whether they should have pursued a completely different design that included a LAS or not.Maybe, once they successfully fly the thing 1,000 or perhaps 100,000 times without any failures, then they could maybe consider removing the LAS. But I sure wouldn't risk the company's existence until establishing such a long-term record of safety first.They'll probably need 1,000 test flights just to get FAA certification (Boeing 787: 1,707 test flights), so by your own logic this would remove the need for LAS.Also I'm not sure the Shuttle example supports your point, after Challenger there were discussions about adding launch escape pods, but ultimately they decided not to do it.
Not a lawyer, but perhaps SpaceX could incorporate a different, independent P2P service company that leased BFRs from SpaceX. No SpaceX management, board people. If SpaceTran were to be sued into oblivion, SpaceX would not be affected financially. Image & reputation a different matter.I regard the above as moot because I do not see P2P happening for decades, if ever, because of reliability, time & # of flights needed to prove that BFR 5.0 or whatever really IS commercial passenger worthy, facilities costs (includes landing/takeoff ports), whatever.
If the cause of loss of life was determined to be a design defect, such as lack of LAS, then the manufacturer SpaceX will be sued. Many countries have reasonable limits to lawsuits, but you can sue over almost anything in the USA.
Quote from: philw1776 on 08/09/2018 02:54 pmNot a lawyer, but perhaps SpaceX could incorporate a different, independent P2P service company that leased BFRs from SpaceX. No SpaceX management, board people. If SpaceTran were to be sued into oblivion, SpaceX would not be affected financially. Image & reputation a different matter.I regard the above as moot because I do not see P2P happening for decades, if ever, because of reliability, time & # of flights needed to prove that BFR 5.0 or whatever really IS commercial passenger worthy, facilities costs (includes landing/takeoff ports), whatever.If the cause of loss of life was determined to be a design defect, such as lack of LAS, then the manufacturer SpaceX will be sued. Many countries have reasonable limits to lawsuits, but you can sue over almost anything in the USA.
I would be very interested to read what Virgin G attorneys have come up with.
Quote from: TripleSeven on 08/09/2018 05:51 pmI would be very interested to read what Virgin G attorneys have come up with.Informed consent and an ironclad waiver giving up any rights for anyone to sue the company or anyone related to it for anything, no doubt. If you don't want to accept the risks, then you don't fly.That's fine for thrill rides on an experimental craft. It won't work for passenger transport for hire.
Dad's theory in short is that there is no "wavier" that can be written which "out of hand" will push a motion of dismissal based on the signing of the waiver itself.
Quote from: envy887 on 08/09/2018 06:12 pmQuote from: TripleSeven on 08/09/2018 05:51 pmI would be very interested to read what Virgin G attorneys have come up with.Informed consent and an ironclad waiver giving up any rights for anyone to sue the company or anyone related to it for anything, no doubt. If you don't want to accept the risks, then you don't fly.That's fine for thrill rides on an experimental craft. It won't work for passenger transport for hire.My father is a private pilot, it runs in the family even before him...and I have talked to him about Virgin Galatic...Dad's theory in short is that there is no "wavier" that can be written which "out of hand" will push a motion of dismissal based on the signing of the waiver itself. Or one "tough enough" to make a motion of summary judgment successful based on the signing of the waiverHE Points to the Virgin Galactic accident as something that would have "pierced" any "waiver" or "informed consent" signing. The failure of one of the flight crew to have followed established procedure would have made the company "severely" liable for negligence in the performance of duties by one of its employees and negligence in the design and operation of the vehicle.his explanation of this to a layman (me) was that it didnt matter that the airplane/whatever was experimental or the company had said "you could die" just by riding this...the negligence (or lack of ordinary care) in the performance of the duty...was the cause of the accident, and no one can get that waived.I agree completely with your last sentence
what will happen if this ever gets going (and as you can tell by my comments here I am true skeptic is that at some point the FAA (most likely) will be legislated to regulate this in some fashion. The FAA will then sit down to write some kind of performance and certification criteria for the "vehicles" and their operation; much as it has done (as either the FAA or the CAA) for airplanes for a very long period of time
Quote from: TripleSeven on 08/09/2018 06:23 pmQuote from: envy887 on 08/09/2018 06:12 pmQuote from: TripleSeven on 08/09/2018 05:51 pmI would be very interested to read what Virgin G attorneys have come up with.My father is a private pilot, it runs in the family even before him...and I have talked to him about Virgin Galatic...Dad's theory in short is that there is no "wavier" that can be written which "out of hand" will push a motion of dismissal based on the signing of the waiver itself. Or one "tough enough" to make a motion of summary judgment successful based on the signing of the waiverHE Points to the Virgin Galactic accident as something that would have "pierced" any "waiver" or "informed consent" signing. The failure of one of the flight crew to have followed established procedure would have made the company "severely" liable for negligence in the performance of duties by one of its employees and negligence in the design and operation of the vehicle.his explanation of this to a layman (me) was that it didnt matter that the airplane/whatever was experimental or the company had said "you could die" just by riding this...the negligence (or lack of ordinary care) in the performance of the duty...was the cause of the accident, and no one can get that waived.I agree completely with your last sentenceI'm sure Virgin is well prepared for any legal battles that might occur, and is not too worried about getting a case dismissed out of hand.IANAL, but my understanding is that a well-constructed waiver (with appropriate and clear descriptions of the risks) will stand up against suits for simple negligence. They would not for gross negligence, but that is generally much more difficult to prove, depending on the state. I haven't seen any definition of gross negligence that fits the SS2 accident. The pilot made a mistake, and the design wasn't proofed against that particular mistake. But that doesn't include things like "and act or omission with extreme risk" or "conscious indifference" which are generally required for gross negligence.
Quote from: envy887 on 08/09/2018 06:12 pmQuote from: TripleSeven on 08/09/2018 05:51 pmI would be very interested to read what Virgin G attorneys have come up with.My father is a private pilot, it runs in the family even before him...and I have talked to him about Virgin Galatic...Dad's theory in short is that there is no "wavier" that can be written which "out of hand" will push a motion of dismissal based on the signing of the waiver itself. Or one "tough enough" to make a motion of summary judgment successful based on the signing of the waiverHE Points to the Virgin Galactic accident as something that would have "pierced" any "waiver" or "informed consent" signing. The failure of one of the flight crew to have followed established procedure would have made the company "severely" liable for negligence in the performance of duties by one of its employees and negligence in the design and operation of the vehicle.his explanation of this to a layman (me) was that it didnt matter that the airplane/whatever was experimental or the company had said "you could die" just by riding this...the negligence (or lack of ordinary care) in the performance of the duty...was the cause of the accident, and no one can get that waived.I agree completely with your last sentence
Quote from: TripleSeven on 08/09/2018 05:51 pmI would be very interested to read what Virgin G attorneys have come up with.