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Old 08-26-2022, 09:09 PM   #31
scc
 
Join Date: Mar 2013
Default Re: [Bio-Tech] Human Genetic Engineering When?

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Originally Posted by Fred Brackin View Post
So you're at a probable minimum of 2050 to 2060 for your vehicle to be ready.

Then 7% of c commits you to something more than 60 years for one way trips.

I will note that even 7% of c is quite hard to achieve for anything other than a reactionless drive of some description.
I was thinking slightly earlier for the launch, but your later dates might be right, I'll probably go for the 2050 one.

As for getting 7% C, for in-system transport I've settled on a system of stationary particle accelerators pushing Mag-Sail ships around, it's somewhat plausible and is interesting. I figure if a ship passes by multiple of these on it's way out the system they can get it up to 3,750 MPS, which is about 2% C and the rest can come from something like 12 fuel tanks the size of the ship for a TL10 Antimatter Plasma Rocket. This later was chosen because it makes the journey shorter over an Advanced Fusion Pulse Drive and once you account for the fact that getting the crew back is also important, costs about the same.
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Old 08-26-2022, 10:21 PM   #32
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Join Date: Jun 2005
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Default Re: [Bio-Tech] Human Genetic Engineering When?

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I was thinking slightly earlier for the launch, but your later dates might be right, I'll probably go for the 2050 one.

As for getting 7% C, for in-system transport I've settled on a system of stationary particle accelerators pushing Mag-Sail ships around, it's somewhat plausible and is interesting. I figure if a ship passes by multiple of these on it's way out the system they can get it up to 3,750 MPS, which is about 2% C and the rest can come from something like 12 fuel tanks the size of the ship for a TL10 Antimatter Plasma Rocket. This later was chosen because it makes the journey shorter over an Advanced Fusion Pulse Drive and once you account for the fact that getting the crew back is also important, costs about the same.
I don't think you'll have the external particle accelerators in the other solar system when you want to make the return trip. And it seems as if you've have used up your antimatter on the way out. Getting home may not work so well.
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Old 08-27-2022, 12:13 AM   #33
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Default Re: [Bio-Tech] Human Genetic Engineering When?

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I don't think you'll have the external particle accelerators in the other solar system when you want to make the return trip. And it seems as if you've have used up your antimatter on the way out. Getting home may not work so well.
Yes, I realized that, the slower return speed bumps it up to 86 years, except the crew will find FTL capable vessels and use them to come back faster.
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Old 08-27-2022, 05:13 AM   #34
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Default Re: [Bio-Tech] Human Genetic Engineering When?

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Yes, I realized that, the slower return speed bumps it up to 86 years, except the crew will find FTL capable vessels and use them to come back faster.
But they wouldn't have been able to plan on that faster return when they departed.
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Old 08-27-2022, 08:46 PM   #35
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Default Re: [Bio-Tech] Human Genetic Engineering When?

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But they wouldn't have been able to plan on that faster return when they departed.
Which is why I wanted to genetically engineer the crew for Hibernation and Longevity. Hibernation 4 means if the crew leaves at age 24, they arrive age 60, 10 years exploring, age 70, and then age 132 when they get back, if they make it, which is kind of likely with Longevity.
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Old 08-27-2022, 09:25 PM   #36
Fred Brackin
 
Join Date: Aug 2007
Default Re: [Bio-Tech] Human Genetic Engineering When?

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Which is why I wanted to genetically engineer the crew for Hibernation and Longevity. Hibernation 4 means if the crew leaves at age 24, they arrive age 60, 10 years exploring, age 70, and then age 132 when they get back, if they make it, which is kind of likely with Longevity.
Um, maybe. I know by now you may not want more rules details but Aging Rolls add up by doubling frm 70 til 90 and then quadrupling after 90. You'll hit a full 216 rolls for each attribute at age 129 and will have lost 4 pts from each Attribute even with Longevity. At least your rolls don't get harder as your Ht drops.

That assumes HT 10 and medical TL of 10 and anormal Aging Roll of 16. Give them 1 more pt of Ht (or tL or whatever) and you hit a special rule in the Aging ruls in Campaigns where you only lose an attribute pt on a natural 18. That'll get you to 132.
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Old 08-27-2022, 11:28 PM   #37
scc
 
Join Date: Mar 2013
Default Re: [Bio-Tech] Human Genetic Engineering When?

Well first of all I mucked up on my last post, per the plan they'll be 128 when they get home, less if they hibernate while moving between survey targets, which is likely.
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Originally Posted by Fred Brackin View Post
Um, maybe. I know by now you may not want more rules details but Aging Rolls add up by doubling frm 70 til 90 and then quadrupling after 90. You'll hit a full 216 rolls for each attribute at age 129 and will have lost 4 pts from each Attribute even with Longevity. At least your rolls don't get harder as your Ht drops.

That assumes HT 10 and medical TL of 10 and anormal Aging Roll of 16. Give them 1 more pt of Ht (or tL or whatever) and you hit a special rule in the Aging ruls in Campaigns where you only lose an attribute pt on a natural 18. That'll get you to 132.
TL10 and HT10 mean aging rolls of 17, at least at first, so they'll only lose one per stat, on average, and if they have higher HT or (Very) Fit, which I consider likely for this mission, they'll stay above that threshold even longer.
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Old 08-28-2022, 06:25 AM   #38
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Default Re: [Bio-Tech] Human Genetic Engineering When?

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TL10 and HT10 mean aging rolls of 17, at least at first, so they'll only lose one per stat, on average, and if they have higher HT or (Very) Fit, which I consider likely for this mission, they'll stay above that threshold even longer.
Are you taking into account that a roll of 17 is always a failure?
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Old 08-28-2022, 09:14 AM   #39
Fred Brackin
 
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Default Re: [Bio-Tech] Human Genetic Engineering When?

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Are you taking into account that a roll of 17 is always a failure?
There's a special exception to that on 444 of Campaigns. It says that if you have Longevity and your modified HT for the Aging Roll is 17+ only an 18 fails.

I'm not sure if this is a good idea but it's pretty explicitly the RAW.
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Old 08-28-2022, 09:50 AM   #40
Varyon
 
Join Date: Jun 2013
Default Re: [Bio-Tech] Human Genetic Engineering When?

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Drive is developed in 2020, megastructure is discovered this year or next.
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... I'll probably go for the 2050 one.

... and the rest can come from something like 12 fuel tanks the size of the ship for a TL10 Antimatter Plasma Rocket.
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TL10 and HT10 mean aging rolls of 17, at least at first, so they'll only lose one per stat, on average, and if they have higher HT or (Very) Fit, which I consider likely for this mission, they'll stay above that threshold even longer.
So from this I'm assuming the society manages to go from TL 8 to TL 10 in several fields in the short 30 years between 2020 and 2050. That is an incredible rate of advancement. 2050 is when UT had TL 10 starting on the Accelerated path... but that also had us reaching TL 9 in 2020. You'll need an alternate history setting, probably with the point of divergence around 2007 (when UT was published) at the latest and then go with the Accelerated path... which if it holds will mean the society that sends them will have advanced to TL 11 by the time they arrive, and will have advanced to TL 12 by the time they would have returned if they didn't discover FTL travel at the alien megastructure.

I'm reminded a bit of a short story I read a while back, about a sleeper ship that is sent to colonize a habitable world that is discovered some distance from Earth. When they awaken in the target system, they are shocked to find it already colonized. It turns out that some time after their ship launched, new breakthroughs allowed the creation of a colonization ship that would be able to arrive before the first one did, and a new colonization vessel was launched. Of course, they didn't make it there first either - turns out there were multiple such advances, and each time another ship was launched to arrive before the previous one. This ultimately culminated in the system being colonized a few years before the first ship even launched, due to the last set of colonists to leave using a drive that distorted time, and then the rest trickled in in reverse order of when they launched.
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