Search found 118 matches

by RERT
Wed Jan 03, 2018 11:15 am
Forum: News
Topic: SpaceX News
Replies: 2203
Views: 319045

Re: SpaceX News

Not enough information. I think it depends on the relative launch costs of an F9 payload with the two platforms. Costs probably just means operating costs, as the capital cost of a launch of each is the same - a fiftieth of the cost of a BFR, if you will never replace the F9. If you always make more...
by RERT
Fri Dec 29, 2017 7:33 pm
Forum: Design
Topic: Radiation Shielding Materials Containing H, B, and N
Replies: 7
Views: 6238

Re: Radiation Shielding Materials Containing H, B, and N

I found this, seems to corroborate the above, around page 65 onwards

http://www.iaea.org/inis/collection/NCL ... 090626.pdf
by RERT
Thu Dec 28, 2017 3:53 pm
Forum: Design
Topic: Radiation Shielding Materials Containing H, B, and N
Replies: 7
Views: 6238

Re: Radiation Shielding Materials Containing H, B, and N

I've been fiddling with data from Wikipedia on p11B fusion, which suggests that the side reaction p+11B->12C+Gamma (16MeV) occurs with a 0.1 % branching probability. Given this, I think a 10MW (Th) reactor would be a source of kilowatts of 16MeV gammas, and I agree with the last post that a foot of ...
by RERT
Fri Dec 15, 2017 1:49 pm
Forum: News
Topic: laser fusion breakthrough
Replies: 3
Views: 3050

Re: laser fusion breakthrough

I asked a physics question at the LPP crowdfunding site stemming from linking to the paper from her. Eric Lerner of LPP said they had been exchanging info with this group. Also interesting to note the basic physics of the Avalanche mechanism talked about in the arxiv paper linked in the root post wo...
by RERT
Sat Dec 02, 2017 4:09 pm
Forum: News
Topic: Lawaranceville E-Newsletter
Replies: 819
Views: 213683

Re: Lawaranceville E-Newsletter

I think the right way to view this offering is as a charitable donation that comes with a lottery ticket. Structurally, you might make 100 times your money with a probability less than 1 in 10000 - my guess. However, I thought it was worth supporting when it was pure charity and more so now. You cer...
by RERT
Mon Oct 23, 2017 7:25 pm
Forum: News
Topic: Applied Fusion Systems to build prototype reactor in 3 years
Replies: 12
Views: 6028

Re: Applied Fusion Systems to build prototype reactor in 3 years

This is a wildly optimistic way to look at it, but you could equally ask why there is more than one company making IC engined cars. One way to answer: because the monopoly profits accruing to a single manufacturer would tempt in many competitors...
by RERT
Fri Aug 11, 2017 9:25 pm
Forum: News
Topic: EM Drive
Replies: 672
Views: 175194

Re: EM Drive

I agree Shawyers theory appears to be rubbish. My opinion on the accounts is that Shawyer has spent many years and many hundreds of thousands of pounds testing his concept. He should know if it works or not. He is either right, criminal, or delusional. The remark about the B37b was meant to be mildl...
by RERT
Fri Aug 11, 2017 7:59 am
Forum: News
Topic: EM Drive
Replies: 672
Views: 175194

Re: EM Drive

Except that Shawyer has (probably) sunk his own money into his company, along with that of other people willing to give him indefinite term, interest free loans - close friends. He has been paying back for a couple of years, as disclosed in related party transactions. Read the last 10 years accounts...
by RERT
Fri May 05, 2017 10:33 pm
Forum: News
Topic: More Helion Energy news....
Replies: 203
Views: 70453

Re: More Helion Energy news....

Hi Maui! Yes, you'd think the US could manage the equivalent of a cup of coffee each per YEAR on fusion research. Put like that, I think my Saturday is going to end with a stiff drink....
by RERT
Fri May 05, 2017 8:03 am
Forum: News
Topic: More Helion Energy news....
Replies: 203
Views: 70453

Re: More Helion Energy news....

The $5 bn figure seems to be politicians peddling a view by picking at the tax treatment of oil and gas and calling various things subsidies and tax breaks. In these days of partisan non-facts, it has no credibility. Every company has allowable costs for tax purposes. The belief that this amounts to...
by RERT
Thu Apr 13, 2017 4:44 pm
Forum: News
Topic: Mach Effect progress
Replies: 2667
Views: 510560

Re: Mach Effect progress

We're getting a distance from the Mach effect, but one last thought. Suppose the LGMs know they will arrive in 1000 years and are expecting a fair fight. If they can reduce economic growth on Earth by 0.3% pa, we will be 20 times poorer than we would have been by the time they get here. No longer a ...
by RERT
Thu Apr 13, 2017 7:17 am
Forum: News
Topic: Mach Effect progress
Replies: 2667
Views: 510560

Re: Mach Effect progress

Here's a book plot for you. Intelligence is transient: farming has removed all selection pressure, and brain size is already heading south very fast. All the LGMs have to do is slow progress enough, and they have a defence strategy. So: they regulate away nuclear power, nuclear rockets. Make sure fu...
by RERT
Mon Mar 06, 2017 11:04 am
Forum: News
Topic: Fission news(I know blasphemy )
Replies: 53
Views: 19765

Re: Fission news(I know blasphemy )

This response from Thorcon on the 'drain event'. After a drain , the normal procedure is to use one of the drain tank's three fluidic pumps to transfer the fuelsalt to either a) back into this Can's primary loop, or b) to the other Can in this PMOD's, or c) to the PMOD's fuelsalt transfer cask. A dr...
by RERT
Mon Mar 06, 2017 10:55 am
Forum: News
Topic: Fission news(I know blasphemy )
Replies: 53
Views: 19765

Re: Fission news(I know blasphemy )

...first P-11B fusion in small machines, then large, followed by D-D fusion, solar/ wind, D-T in smaller machines, thorium and liquid salt fission, D-T fusion in large machines similar to ITAR, and finally classical fission.... Interesting list, and seems sensible. Solar/Wind without batteries is m...
by RERT
Fri Mar 03, 2017 8:25 am
Forum: News
Topic: Fission news(I know blasphemy )
Replies: 53
Views: 19765

Re: Fission news(I know blasphemy )

The Thorcon FDT is below the 'can', which contains the reaction vessel and primary cooling circuit. The facility includes a 400 ton hoist to remove and replace the can as a unit. Once the can is removed, there is no obvious reason why the exposed FDT could not also be lifted out and reprocessed at a...

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