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Re: Independent and Tramp Traders | |
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by SJLee » Thu Mar 17, 2016 9:46 pm | |
SJLee
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Let me see if I can synthesize some of the replies.
There seems to be some suggestion that there are smaller freighters operating in the Honorverse that hasn't really been specifically explored until CS2. Given the marginal nature of the Hali Sowle it's probably fair to say that it might represent one margin, it has a tiny crew, it was literally a pile of scrap that was saved for a brief mission. Costs and crew size are relatively fixed, in a way. The only way to get beneath say 30 crew would be to run risks, or automate, which would cost more. The average tramp is probably owned by parent company to cover the initial cost, which is in the 10s, or 100s of millions M$. Independent traders would either have to be quite wealthy or well-connected, or inherit their ship. I wonder what type of ships were going around the Rembrandt Trade Union before Lynx. The Partner Captains were probably operating smaller freighters. It seems like some of the elements of the Honoverse make the traditional depiction of "Space Truckers" in science fiction very rare. |
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Re: Independent and Tramp Traders | |
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by kzt » Fri Mar 18, 2016 1:22 am | |
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I think you underestimate the cost. All the freighter prices we have are in the many hundred of millions M$, ranging to a couple of billion. You might get an old piece of junk that is a century old with a needed maintenance list that is pages long and is only space-worthy if you have a death wish for that, but nodes still cost enormous amounts of money to replace when they wear out. The smallest freighter noted in the books seems to be a million tons, and David has mentioned that ships that small are fairly rare. Can't find that off-hand, but here's a comment on freighter size. "Nor, for that matter, did Pirates' Bane. At around five million tons, the freighter was of little more than average size for most regions of space, although she did tend towards the upper end of the tonnage range here in Silesia." |
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Re: Independent and Tramp Traders | |
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by Jonathan_S » Fri Mar 18, 2016 8:26 am | |
Jonathan_S
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well we do also see 40k-ton yachts - Honor's Star Falcon(?)-class. i assume that's based off a slightly enlarged dispatch boat design. But with near dispatch boat speed (implying military grade impellers, hyper-gen, and shielding) it probably costs more to operate than an 8 m-ton freighter. After all, even on these scales, steel is cheap. There may be some specialized freighter designs that are sub m-ton, and curtains passenger liners seem to be, but the upfront and operational costs of freighters would be very close for them whether they were 1 m-ton or 10. The exrptra space is almost all just more cargo hold; you shouldn't need a bigger engineering space, nor a significantly more powerful wedge, nor noticeably more crew. The systems and habitable space would be pretty similar. A bigger life support system if you need the ability to provide habitable atmosphere in all cargo holds simultaneously; otherwise the extra space is just more steel wrapped around approximately the same guts. The operational costs per ton of cargo should drop quickly in a larger design, so economics tend to push for the largest practical freighter. (Though routes using busy wormholes might push back against that if the tolls strongly penalize ships large enough to cause delays due to destabilizing the wormhole longer than the normal transit interval between ships) |
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Re: Independent and Tramp Traders | |
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by Michael Everett » Fri Mar 18, 2016 2:03 pm | |
Michael Everett
Posts: 2619
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Bolding mine. I don't think that transit intervals are a problem with civilian starships. Given how you can never be sure how good civilian pilots are (multiple star systems each with differing ideas of what "good piloting" is), the gap between transiting starships is probably two or three times the actual destabilization interval just to make sure that the idiot behind the helm has enough time to remember to hit the right button to go from Sails to Wedge before the next ship appears and runs into its stern. Military transits are different because you can be pretty certain that the helms-people have a good clue as to what they are doing. ~~~~~~
I can't write anywhere near as well as Weber But I try nonetheless, And even do my own artwork. (Now on Twitter)and mentioned by RFC! ACNH Dreams at DA-6594-0940-7995 |
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Re: Independent and Tramp Traders | |
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by Theemile » Fri Mar 18, 2016 2:08 pm | |
Theemile
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Even then we've seen warships run into each other during minimum duration transits. White Haven had 2 DDs bump during his famous double transit, and he had tugs waiting for such an event because he expected even more occurrences due to how close he was shaving margins. ******
RFC said "refitting a Beowulfan SD to Manticoran standards would be just as difficult as refitting a standard SLN SD to those standards. In other words, it would be cheaper and faster to build new ships." |
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Re: Independent and Tramp Traders | |
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by saber964 » Fri Mar 18, 2016 4:19 pm | |
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After WWII the U.S. government sold off hundreds of merchant ships, namely Liberty ships and for a few years after kept building the larger and faster Victory ships. Those ships that were sold off were used to rebuild or strengthen the merchant fleets of several countries like France Holland England Germany and Japan. They operated for over a decade after the war. |
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Re: Independent and Tramp Traders | |
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by Jonathan_S » Fri Mar 18, 2016 4:57 pm | |
Jonathan_S
Posts: 8792
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You're could be right. Minimum allowed by Manticoran Junction Traffic Control, IIRC, is 60 second intervals. And IIRC Junction Control doesn't normally need to go that tight; on what is probably the busiest wormhole in existence. (The DDs that collided were going through a minimum possible 10 second intervals; since they weren't big enough to destabilize it for longer than that). OTOH we're told an old SD (say 8.5 mtons) will destabilize a wormhole for 113 seconds. If my math is correct a 10 mton freighter would block it for 154 seconds (~2 1/2 minutes) and a theoretical 16 mton monster for 394 seconds (~6 1/2 minutes). I could see some extra fees for a ship that blocks the wormhole for what's probably 3 times the normal 'safe' interval; or 6 times the minimum 'safe' interval. But maybe other economic factors keep ships from growing that large so the issue has never come up. <shrug> |
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Re: Independent and Tramp Traders | |
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by darrell » Fri Mar 18, 2016 10:57 pm | |
darrell
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Where do you get a 10MT freighter at? The biggest freigher I have ever seen in the honorvers is 8.5M tons, the same size as the largest SD.
Same goes for a "theoretical 16 mton monster" which would be the same size as a junction fort. The grayson compensators are more efficient, meaning that they allow a faster acceleration for the same ship size. They are not more powerful, meaning that the biggest ship size you can effectively use compensators on remains 8.5M tons.
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Logic: an organized way to go wrong, with confidence. |
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Re: Independent and Tramp Traders | |
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by munroburton » Fri Mar 18, 2016 11:36 pm | |
munroburton
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Actually, maximum size has been creeping up all along. If you read HoS, it's pretty clear the Sphinx morphed into the Gryphon, then the Steadholder Denvenski and finally the Benjamin the Great class. There's a ~300,000 ton difference between Sphinx and BtG. There was only a tiny difference between the BtG and the Medusa, despite the radical design differences. However, the Harrington-II is 8.8m tons, just ahead of the Invictus. That's a growth of 600,000 in 20 years. That increase may not be entirely attributable to the Grayson compensators - the tonnage ceiling went up 1.8 million tons in about 150 years before Grayson came onto the interstellar scene. The rapid growth in that 20 years may be down to Manticore's need to build individually superior units to Haven's(the Haven-class SDs apparently only massed 7.9mt and the preceding DuQuesne class was 7.2mt). As for a 10MT freighter, I think that one's theoretical too. |
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Re: Independent and Tramp Traders | |
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by Jonathan_S » Sat Mar 19, 2016 1:24 am | |
Jonathan_S
Posts: 8792
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Should have been clearer - the 16 m-ton in specific was just a semi-arbitrary "way larger than anything we've seen yet" size (as you note; similar to the size of some forts). The biggest warship we've seen is the Invictus class at just under 8.8 mtons. But assuming pre-Grayson compensators[1] either of those big ships would have a max accel of a fort; around 75-80g using grav plates instead of a compensator. (The crossover point where grav plates beat out a compensator was right on 9.25 mtons). Oops I should have run those numbers; I'd intended the 10 mton to be big and slow; just not that slow. Though I guess an 80g freighter actually isn't the end of the world. It still reaches it's max cruising velocity in about 53 hours; compared to 13 hours for a 8.5 mton freighter w/ normal safety margin. So it's less than 2 days slower on most point to point trips. (I'm ignoring the 10x accel boost a compensator gets while in a grav wave). At since most trips are weeks long a couple days to double the cargo capacity might make sense on a few specific routes. [1] And that seems a safe assumption for the moment. Nobody would be happy about the security risk of putting top secret military compensator technology on a civilian freighter |
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