Search found 2248 matches

by hanelyp
Sun Apr 21, 2019 5:23 am
Forum: General
Topic: Extraterrestrial colony companies
Replies: 30
Views: 9947

Re: Extraterrestrial colony companies

Blackbody radiation scales with the 4th power of temperature. So a 30% reduction in incoming solar energy gives less than a 9% drop in temperature. Not sure I follow your calculations. Thought it was heat loss by radiation was proportional to the 4th power of the temperature difference. Nope, black...
by hanelyp
Fri Apr 19, 2019 12:28 am
Forum: News
Topic: US navy patents exotic propulsion aircraft
Replies: 1
Views: 287

Re: US navy patents exotic propulsion aircraft

The F-302 is supposed to be ultra top secret. :wink:
by hanelyp
Fri Apr 19, 2019 12:23 am
Forum: General
Topic: Extraterrestrial colony companies
Replies: 30
Views: 9947

Re: Extraterrestrial colony companies

Blackbody radiation scales with the 4th power of temperature. So a 30% reduction in incoming solar energy gives less than a 9% drop in temperature. On the other hand, if I've got my calculations right, a planet twice the distance from the star would have a roughly Earth like temperature.
by hanelyp
Tue Apr 09, 2019 1:43 am
Forum: News
Topic: ENN Fusion Engine Challenge (FUGINE)
Replies: 3
Views: 354

Re: ENN Fusion Engine Challenge (FUGINE)

"Climate change", second sentence in the introduction. Well, there goes their credibility. Fusion energy does not need a bogus climate crisis to justify it.
by hanelyp
Tue Apr 09, 2019 1:37 am
Forum: News
Topic: Thermal battery with 6-8 times the energy density of lithium
Replies: 9
Views: 897

Re: Thermal battery with 6-8 times the energy density of lithium

I didn't see Rossi's picture in the article, but a thermal generator with only 3 moving parts? Suggests thermoelectric generator with efficiencies ranging from 6% to 15%, that doesn't seem like a very good deal to me. I've read of Stirling-electric generators with a grand total of 2 moving parts, n...
by hanelyp
Tue Mar 26, 2019 5:52 am
Forum: General
Topic: Sell The Whitehouse to Trump
Replies: 984
Views: 149183

Re: Sell The Whitehouse to Trump

Build a wall, steal a wall, who would have thunk it https://www.facebook.com/thedailyshow/videos/1164893220345695/?t=2 :lol: :lol: And...that's an argument for not building a wall? Or one for building a wall along with more border guards/troops to reinforce it and help keep it secure? If a bank get...
by hanelyp
Fri Mar 22, 2019 1:17 am
Forum: General
Topic: Sell The Whitehouse to Trump
Replies: 984
Views: 149183

Re: Sell The Whitehouse to Trump

Will the desalination and water pumping be able to match the highly variable electrical production from solar and wind?
by hanelyp
Tue Feb 12, 2019 12:33 am
Forum: General
Topic: Sell The Whitehouse to Trump
Replies: 984
Views: 149183

Re: Sell The Whitehouse to Trump

NPR => fake news.
by hanelyp
Fri Jan 25, 2019 7:07 am
Forum: News
Topic: EMC2 news
Replies: 411
Views: 150539

Re: EMC2 news

A fission reactor that can be transported by air, then set up behind local materials for radiation shielding, not a huge problem. Transporting that same reactor home after it's been operating, much harder. Fusion would be a huge improvement in longer lived induced radiation. But the polywells we've ...
by hanelyp
Fri Jan 04, 2019 4:57 am
Forum: News
Topic: SpaceX News
Replies: 2256
Views: 406352

Re: SpaceX News

As I understand it, carbon fiber produces fewer secondaries from cosmic rays than a steel structure. A matter of atomic number.
by hanelyp
Sat Dec 22, 2018 11:31 pm
Forum: News
Topic: SpaceX News
Replies: 2256
Views: 406352

Re: SpaceX News

Until we can launch despite common winds, space flight won't be where we want it.
by hanelyp
Sat Nov 10, 2018 3:38 am
Forum: General
Topic: Extraterrestrial colony companies
Replies: 30
Views: 9947

Re: Extraterrestrial colony companies

If polar regions are premium real estate on the Moon, a transfer station at L1 or L2 seems a strategic location to catch a shuttle to the lunar surface. I'm assuming a transportation architecture where using 3 specialized spacecraft and 2 transfer stations, one in LEO and the other somewhere near t...
by hanelyp
Fri Oct 19, 2018 5:59 am
Forum: Administration
Topic: possible legislative threat
Replies: 3
Views: 10542

Re: possible legislative threat

Since the original post, the bill has morphed twice, first to a mostly harmless form, then to the form of a study committee on the issue, with much harder to predict long term fallout, passed the legislature, and been vetoed. It may return in future legislative sessions in some form, as the veto was...
by hanelyp
Sat Oct 06, 2018 3:34 am
Forum: News
Topic: SpaceX News
Replies: 2256
Views: 406352

Re: SpaceX News

Launches from Vandenberg are used for polar orbits.
by hanelyp
Fri Aug 31, 2018 3:13 am
Forum: News
Topic: Deneum - deuterium/titanium interaction produces energy
Replies: 8
Views: 6353

Re: Deneum - deuterium/titanium interaction produces energy

This reminds me of the electrolytic cold fusion fiasco.

Claimed energy costs less than a tenth natural gas? That smells of a badly considered scam.

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