Search found 5930 matches

by Skipjack
Wed Oct 17, 2018 1:02 pm
Forum: News
Topic: Z-Pinch Renaissance
Replies: 18
Views: 12325

Re: Z-Pinch Renaissance

7 papers on Uri Shumlak's Sheared Flow Stabilized Z- Pinch FuZE will be presented at the upcoming 60th Annual Meeting of the APS Division of Plasma Physics in November. Among them interesting topics like scaling the output up to reactor conditions and a paper on how it can be used as a propulsion sy...
by Skipjack
Thu Oct 11, 2018 1:26 pm
Forum: News
Topic: SpaceX News
Replies: 2175
Views: 289588

Re: SpaceX News

Let's not forget that congress cut the funding for commercial crew by 67% between 201 to 2013 and continued to underfund it thereafter, which resulted in the delays of commercial crew and the continued reliance on Russian Soyuz.
by Skipjack
Mon Oct 08, 2018 4:35 pm
Forum: News
Topic: SpaceX News
Replies: 2175
Views: 289588

Re: SpaceX News

Yeah, I saw :(
Well, lets hope for better luck next time!
by Skipjack
Mon Oct 08, 2018 2:49 am
Forum: News
Topic: SpaceX News
Replies: 2175
Views: 289588

Re: SpaceX News

Pretty launch tonight. Uneventful, but pretty. Wonder whether they caught themselves a fairing today :)
by Skipjack
Wed Oct 03, 2018 5:44 pm
Forum: News
Topic: EMC2 news
Replies: 358
Views: 80335

Re: EMC2 news

Some of the units in that PDF look odd?
by Skipjack
Wed Oct 03, 2018 9:24 am
Forum: News
Topic: EMC2 news
Replies: 358
Views: 80335

Re: EMC2 news

Thanks Joe! This does look really interesting! Looks like they have all the pieces together and just need to get the funding to build more test devices. Let's hope that this comes along. Maybe they can get funding from ARPA-E like so many others did. NIAC seems to be a means to get small funding as ...
by Skipjack
Tue Oct 02, 2018 10:02 pm
Forum: News
Topic: More Helion Energy news....
Replies: 202
Views: 61914

Re: More Helion Energy news....

Yes, I presume that we won't see results for Helion's new device before some time next year. Would be exciting to see them reach break even in 2019! The others are not that far behind either and we might see several contenders reach break even in the coming 5 years. Given the currently known timelin...
by Skipjack
Tue Oct 02, 2018 2:38 pm
Forum: News
Topic: More Helion Energy news....
Replies: 202
Views: 61914

Re: More Helion Energy news....

Not much new information, but still worth a post:
https://www.nextbigfuture.com/2018/10/h ... -year.html
by Skipjack
Fri Sep 28, 2018 2:54 pm
Forum: News
Topic: MIT claim they will build the SPARC
Replies: 7
Views: 3683

Re: MIT claim they will build the SPARC

I think that Dennis Whyte and his team at the MIT have done a great job at making Tokamaks interesting again.
That said, I think Tokamak Energy will beat CFS and their reactor design is even more compact.
by Skipjack
Thu Sep 27, 2018 11:08 pm
Forum: News
Topic: NantEnergy announces zinc-air battery
Replies: 6
Views: 391

Re: NantEnergy announces zinc-air battery

However, the fact that they have supposedly been testing these batteries in applications that don't require high energy density certainly makes me question that their batteries are. Add to that the fact that they are touting manufacturing price, but say nothing of density. Perhaps the breakthrough ...
by Skipjack
Thu Sep 27, 2018 7:20 pm
Forum: News
Topic: NantEnergy announces zinc-air battery
Replies: 6
Views: 391

Re: NantEnergy announces zinc-air battery

What is the energy/power density of these? I mean, generally, they should be better than Lithium Ion but it could be different for these particular types of cells. Also it seems like Zinc Air batteries usually are not very efficient (only 50% efficiency vs 80+ for other types). Wonder if this applie...
by Skipjack
Wed Sep 26, 2018 4:21 am
Forum: News
Topic: 2018 NIAC Symposium
Replies: 9
Views: 480

2018 NIAC Symposium

Lot's of interesting items at this years NIAC symposium. Today Woodward presented the latest results of the Mach Effect Research. Stephanie Thomas presented more work PSS and PPPL did on the FRC based Direct Fusion Drive. Ryan Weed of Positron Dynamics presented some information on their Positron ca...
by Skipjack
Mon Sep 24, 2018 11:06 am
Forum: News
Topic: SpaceX News
Replies: 2175
Views: 289588

Re: SpaceX News

paperburn1 wrote:
Giorgio wrote:
Skipjack wrote:

well every added KG would mean 2.7 KG less payload.

How is that? Technically it does not matter whether the kg is payload or space ship mass.
by Skipjack
Fri Sep 21, 2018 9:23 pm
Forum: News
Topic: SpaceX News
Replies: 2175
Views: 289588

Re: SpaceX News

A quick google disclosed that the weight of the 4 landing legs of the F9 is around 2500 Kg which is a little bit more than 10% of the empty weight of the F9 rocket and 20% of LEO/ 50% of GTO payload. It is a bit less than 10% of the whole rocket. The second stage has about 4 tonnes, the first stage...
by Skipjack
Wed Sep 19, 2018 6:13 pm
Forum: News
Topic: SpaceX News
Replies: 2175
Views: 289588

Re: SpaceX News

Slipjack has conjecture about increased clearance that I do buy. Still, fins would not be needed for increased leg length, only longer legs. From a static, dynamic and mechanical point of view, the fins are a much better solution than using longer legs in the original position. Indeed, with longer ...

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