Search found 6180 matches

by KitemanSA
Wed Sep 06, 2023 8:56 am
Forum: News
Topic: Vortex rocket engine: lighter, more efficient, more reusable
Replies: 24
Views: 26927

Re: Vortex rocket engine: lighter, more efficient, more reusable

Giorgio wrote:
Wed Jul 31, 2019 8:05 am

They are running cool enough to allow them to increase the pressure to the turbine head up to an incedible 650 Bar, which in turn will allow them to reach the expected 300 Bar in the combustion chamber.
SpaceX recently ran Raptor 3 at a sustained 350 bar. Not bad!
by KitemanSA
Wed Sep 06, 2023 8:51 am
Forum: News
Topic: Cross Border Power / XNRGI
Replies: 4
Views: 9816

Re: Cross Border Power / XNRGI

A new Canadian company with roots in Vermont has emerged from stealth mode and has ambitious plans to roll out a new grid-scale battery in the year ahead. The longshot storage technology, targeted at utilities, offers four times the energy density and four times the lifetime of lithium-ion batterie...
by KitemanSA
Wed Sep 06, 2023 5:34 am
Forum: General
Topic: We lost so many members :(
Replies: 48
Views: 20001

Re: We lost so many members :(

I am back after about a decade.
I will now wait while everyone thinks “who cares”!
by KitemanSA
Wed Sep 06, 2023 4:33 am
Forum: News
Topic: Water based propulsion for deep space efforts
Replies: 14
Views: 19653

Re: Water based propulsion for deep space efforts

Yes, I am reprising a VERY old thread, but…
Seems to me that O2 would be a better fuel. O2 is in EVERYTHING, water not so much. Indeed, we would use the H2 from water to get the O2 out of lots of things.
Just a thought!
by KitemanSA
Tue Sep 05, 2023 10:57 pm
Forum: Design
Topic: Wikipedia Still Wrong
Replies: 2
Views: 369

Wikipedia Still Wrong

I’ve been away for many years but when I looked at the Wiki page on Polywell, the cusp designations are STILL wrong. What they show as the “funny” cusp is really just a point cusp, and what they show as a line cusp becomes a funny cusp as the magnets take on the idealized square shapes that result f...
by KitemanSA
Thu Mar 14, 2019 4:40 am
Forum: General
Topic: HOW DID YOU FIND OUT ABOUT POLYWELL?
Replies: 22
Views: 34728

Re: HOW DID YOU FIND OUT ABOUT POLYWELL?

Tom Liton’s paper in Analog, but it had a cliff hanger ending that took quite a while to resolve.
by KitemanSA
Mon Jul 09, 2018 6:59 pm
Forum: News
Topic: New John Goodenough battery with high (too high?) energy density
Replies: 12
Views: 26899

Re: New John Goodenough battery with high (too high?) energy density

Why? A simple probability calculation: How many battery breakthroughs a week do we have? How many find their way into a working commercially available unit? Your maths are a bit off there. The numerator should be “How many battery breakthroughs a week by the original inventor of the Li-ion battery ”.
by KitemanSA
Mon Jul 09, 2018 6:48 pm
Forum: News
Topic: SpaceX News
Replies: 2324
Views: 1154697

Re: SpaceX News

ladajo wrote:https://www.teslarati.com/spacex-mr-ste ... rendering/

How to catch a fairing... try, try, again...
If it is ejected at about the same time as the first stage, and has a parachute, why not a ramchute and fly it back to the launch site?
by KitemanSA
Sat Jun 16, 2018 11:50 pm
Forum: News
Topic: The list of duds
Replies: 17
Views: 29083

Re: The list of duds

If you want a high capacity “flywheel”, look up info on the “launch loop” Properly suspended you can get ~8km/sec of velocity for your kinetics equation.
by KitemanSA
Thu May 03, 2018 8:05 pm
Forum: News
Topic: Lawaranceville E-Newsletter
Replies: 880
Views: 527178

Re: Lawaranceville E-Newsletter

Investment club anyone?
by KitemanSA
Thu May 03, 2018 2:27 pm
Forum: General
Topic: Donald Trump - Time Lord.
Replies: 4
Views: 16230

Re: Donald Trump - Time Lord.

TARDIS, not pelvic thrust.
by KitemanSA
Tue Apr 24, 2018 8:46 am
Forum: News
Topic: SpaceX News
Replies: 2324
Views: 1154697

Re: SpaceX News

ladajo wrote:And another boring launch...

<yawn>
Sorry dude but that much power is NOT boring.
by KitemanSA
Thu Feb 01, 2018 8:03 pm
Forum: News
Topic: EMC2 news
Replies: 440
Views: 453657

Re: EMC2 news

What about handing the hardware over to other scientists to allow them to confirm the findings and/or explore the concept further with additional experiments that might not have been contemplated during their original testing of the concept? I'm sure there are other people who would love a chance t...
by KitemanSA
Thu Feb 01, 2018 7:58 pm
Forum: News
Topic: SpaceX News
Replies: 2324
Views: 1154697

Re: SpaceX News

What make ANYONE think it is “lost”. Gone stealth, maybe. But lost?
by KitemanSA
Wed Jan 31, 2018 9:41 pm
Forum: General
Topic: Comets can’t explain weird ‘alien megastructure’ star after all
Replies: 29
Views: 52712

Re: Comets can’t explain weird ‘alien megastructure’ star after all

How is this for speculation. There is a smallblack hole or neutron star orbiting the visible star and it keeps the orbital debris from coalescing. Then, on occasion, it gravity lenses the star light toward earth.