Search found 1200 matches
- Mon Feb 03, 2014 4:24 pm
- Forum: News
- Topic: Reaction Engines
- Replies: 37
- Views: 14417
Re: Reaction Engines
Ah... you might want to cut all those numbers in half. Skylon uses two SABREs, and their combined thrust and weight are similar to the figures you provided. Accurate numbers (for SABRE 2; the latest version is SABRE 4) can be had from the C1 trajectory spreadsheet. My information is from http://en....
- Mon Feb 03, 2014 5:50 am
- Forum: News
- Topic: Reaction Engines
- Replies: 37
- Views: 14417
Re: Reaction Engines
It can be ground-tested. It can but for it to make TRL5, it needs to be tested across a broad range of environmental conditions. If that can be done someplace like Marshall, then there's an advantage to ground testing. If there is no preexisting thrust stand that can duplicate the expected environm...
Re: BLP news
Does anyone have a guess as to why BLP announced this demo in the first place if the information released so far is all they ever planned to tell the world? I mean, they could have had the same demo with the same attendees just by having a few private communications. There was no need to tell the wo...
- Sun Feb 02, 2014 5:09 am
- Forum: News
- Topic: Reaction Engines
- Replies: 37
- Views: 14417
Re: Reaction Engines
If it's a boilerplate test vehicle you're after, a Skylon-like one would probably make a lot more sense. Is that what it would be, a boilerplate test vehicle? I don't know about the name but I want a vehicle with enough hydrogen/ lox capacity to reach the flight regime where the Sabre can transitio...
- Sat Feb 01, 2014 8:58 pm
- Forum: General
- Topic: sugar battery an order of magnitude better then lithium.
- Replies: 6
- Views: 4234
Re: sugar battery an order of magnitude better then lithium.
First they used our corn to make ethanol/gasoline,
Now they are going to take our remaining corn syrup to make electricity.
Its a conspiracy against popcorn I tell ya.
Now they are going to take our remaining corn syrup to make electricity.
Its a conspiracy against popcorn I tell ya.
- Sat Feb 01, 2014 8:21 pm
- Forum: News
- Topic: Reaction Engines
- Replies: 37
- Views: 14417
Re: Reaction Engines
As for flying the engine. It does not need a Skylon to fly on. It can fly on a test vehicle. Interesting thought. What would constitute a valid flight test vehicle and where would we find one? Physically the Sabre engine is huge and it gulps propellant. Add: My vote is to build a full capacity engi...
Re: BLP news
one ten thousandths of a liter - That's one cubic centimeter, isn't it?
millions of watts of power - That's megawatts, or mega J/s, (s) > more than 0.278 kilowatt hours per second. Like 2-3 cents worth of power per second.
It should be detectable but needs to be scaled up
millions of watts of power - That's megawatts, or mega J/s, (s) > more than 0.278 kilowatt hours per second. Like 2-3 cents worth of power per second.
It should be detectable but needs to be scaled up
- Thu Jun 27, 2013 5:01 pm
- Forum: News
- Topic: New NBC/Alan Boyle fusion article
- Replies: 6
- Views: 3787
Re: New NBC/Alan Boyle fusion article
Interesting. I guess we knew that, but adding up the $ I get $10,775,504.14 from September 2009 to about now, June 2013. Two and a half million $ a year on average. Take out overhead and G & A that hardly leaves enough for salaries. If anything is being done to advance Polywell, it's being done else...
- Thu Mar 07, 2013 6:22 pm
- Forum: News
- Topic: Some guy at Google likes this
- Replies: 11
- Views: 7198
Re: Some guy at Google likes this
If/when the Navy cuts EMC2 loose, don't we expect to see some publications from EMC2? Surely the work has advanced the understanding of certain plasma physical phenomenon worthy of a paper or two.
- Tue Jan 29, 2013 5:30 am
- Forum: General
- Topic: mystery explosion at Iran's Fordow facility
- Replies: 31
- Views: 7682
- Thu Jan 10, 2013 4:04 am
- Forum: News
- Topic: Apparently we can feasibly get warp drives
- Replies: 28
- Views: 16390
- Mon Dec 31, 2012 9:50 pm
- Forum: General
- Topic: New currency?
- Replies: 48
- Views: 13354
- Thu Dec 13, 2012 3:43 pm
- Forum: General
- Topic: Under four billion
- Replies: 37
- Views: 12032
I already have the dry mass though(though it is a bit arbitrary), what I needed is the fuel mass needed to make the trip(to the moon for this case, though you can do a Mars trip by changing the delta V, engine mass, and ISP accordingly). My big concern was with ISP being pounds of thrust and propel...
- Tue Oct 16, 2012 11:06 pm
- Forum: News
- Topic: SpaceX News
- Replies: 2324
- Views: 1168625
Let us ee. E=1/2mv^2 1kg to orbit is about 1*7000^2/2~25MJ or 25000kWs 25000/3600 ~ 7kWh. At 14 cents/ kWh, that is a whopping ONE DOLLAR! $10,000/kg seems a tad inefficient. Perhaps a Kite Launcher-HASTOL duo would get closer. $1.00 is very close to the number I have seen touted as the electrical ...
- Tue Oct 16, 2012 11:06 pm
- Forum: News
- Topic: SpaceX News
- Replies: 2324
- Views: 1168625
Let us ee. E=1/2mv^2 1kg to orbit is about 1*7000^2/2~25MJ or 25000kWs 25000/3600 ~ 7kWh. At 14 cents/ kWh, that is a whopping ONE DOLLAR! $10,000/kg seems a tad inefficient. Perhaps a Kite Launcher-HASTOL duo would get closer. $1.00 is very close to the number I have seen touted as the electrical ...