Search found 2777 matches
- Sat Jun 18, 2016 3:43 am
- Forum: News
- Topic: SpaceX News
- Replies: 2324
- Views: 1182186
Re: SpaceX News
Speculation, but an engine failure could be simply due to running out of fuel/ oxidizer. Resultant vapor lock or other cause of decreased fuel mixture flow leads to lower thrust. How syncronized is fuel starvation to the three landing engines (or is it on?)? Would plumbing, tilt, etc. allow one engi...
- Mon Jun 13, 2016 4:05 am
- Forum: News
- Topic: SpaceX News
- Replies: 2324
- Views: 1182186
Re: SpaceX News
I wonder if it would make more sense to launch the first reused booster with a consumable payload for the ISS ahead of the scheduled ones. Such a payload is very likely a lot cheaper than a satellite and sending one up before it's needed would mean it's loss wouldn't be a big problem if it fails. T...
- Sat Jun 11, 2016 5:47 am
- Forum: News
- Topic: SpaceX News
- Replies: 2324
- Views: 1182186
Re: SpaceX News
My money saving scenario is supposition but it does seem likely. I also speculate that using a used first stage with minimal modifications, appropriate ballast, etc. could be used to boost the Dragon II for spacecraft escape testing. I think Space X currently plans to use a modified second stage for...
- Sat Jun 11, 2016 5:34 am
- Forum: News
- Topic: cheap, high performance, thermo electric material discoverd
- Replies: 44
- Views: 32123
Re: cheap, high performance, thermo electric material discoverd
Solar photovotaics have historically been narrow bandpass- using only a relatively narrow wavelength range compared to the total solar radiation. But wider bandpass materials and multiple staged bandpass materials are being pursued. While not a power harvester per say, I was intrigued by a proposed ...
- Fri Jun 10, 2016 3:25 am
- Forum: News
- Topic: cheap, high performance, thermo electric material discoverd
- Replies: 44
- Views: 32123
Re: cheap, high performance, thermo electric material discoverd
I don't know if this is redundant or useful but the advancement of harvesting heat energy continues... http://phys.org/news/2016-06-electricity-dimensions.html I am a fusion fan boy, but as I have mentioned in the past, as photovoltaics and thermal conversion of Solar output improves, any fusion out...
- Fri Jun 10, 2016 2:49 am
- Forum: News
- Topic: SpaceX News
- Replies: 2324
- Views: 1182186
Re: SpaceX News
Risks are in proportion to benefits. SpaceX apparently have highly instrumented rockets- this allowed them to quickly pinpoint the failed component in their RUD launch last year. Also, ground testing puts stresses on the spacecraft that again presumably gives substantial information and predictive p...
- Fri Jun 03, 2016 4:19 am
- Forum: News
- Topic: New IEC design from University of Sydney
- Replies: 6
- Views: 7154
Re: New IEC design from University of Sydney
PS: I am getting in the habit of using the term of diffusion for ExB losses. This is because it is much like gas diffusion except for the quantification due to the B field strength and associated gyroradius jumping. Transport is also commonly used, and I think it is included in the group of 'classic...
- Fri Jun 03, 2016 3:48 am
- Forum: News
- Topic: New IEC design from University of Sydney
- Replies: 6
- Views: 7154
Re: New IEC design from University of Sydney
Some interesting interactions pushed. Problems may be m ostly scaling. An ion rich core contained by physical magnetically shielded cathodes seems reasonable, but... Bussard stressed that for useful fusion power independant of Q you must have a considerable density of ions. This is one of the keys ...
- Fri Jun 03, 2016 3:41 am
- Forum: News
- Topic: New IEC design from University of Sydney
- Replies: 6
- Views: 7154
Re: New IEC design from University of Sydney
Some interesting interactions pushed. Problems may be m ostly scaling. An ion rich core contained by physical magnetically shielded cathodes seems reasonable, but... Bussard stressed that for useful fusion power independant of Q you must have a considerable density of ions. This is one of the keys o...
- Sat May 28, 2016 9:04 pm
- Forum: News
- Topic: SpaceX News
- Replies: 2324
- Views: 1182186
Re: SpaceX News
It would seem to me that this is something one could plan for and easily repair or just shim up According to Musk, the crush core can be replaced easily. Indeed replacement back at the Cape is probably trivial. A temporary fix while at sea might utilize jacks and shims. Probably easy with calm seas...
- Sat May 28, 2016 8:51 pm
- Forum: News
- Topic: SpaceX News
- Replies: 2324
- Views: 1182186
Re: SpaceX News
deleted
- Fri May 20, 2016 7:45 pm
- Forum: News
- Topic: Small Tri Alpha news blurp
- Replies: 255
- Views: 265016
Re: Small Tri Alpha news blurp
If I remember correctly, Tri Alpha roughly achieved 1keV plasma temperature so far. Pulsed FRC devices like some of Helion's prototypes have routinely achieved over 5 keV. So it seems relatively plausible that Tri Alpha will achieve the temperatures, they need. What worries me a bit, is that their ...
- Fri May 20, 2016 7:24 pm
- Forum: News
- Topic: SpaceX News
- Replies: 2324
- Views: 1182186
Re: SpaceX News
People are already over interpreting this comment. We do not know how bad the damage really was or how much of that stage can be reused. All that Musk said was that the stage is now their now baseline for ground testing since it was the one that was damaged the most of the 3. Merely speculation bas...
- Thu May 12, 2016 12:55 pm
- Forum: News
- Topic: H-B11 inertial fusion: LENR that maybe works :)
- Replies: 7
- Views: 13307
Re: H-B11 inertial fusion: LENR that maybe works :)
Very quick compression of a fusion substrate may produce a plasma of such density that the few alphas produced would not escape but thermalize with the fuel and drive a progressive heating of the plasma till the fuel was depleted (or some useful subset). This chain reaction concept seems simple. Geo...
- Fri May 06, 2016 7:03 pm
- Forum: News
- Topic: SpaceX News
- Replies: 2324
- Views: 1182186
Re: SpaceX News
As a tangential consideration- I wonder if the cluster of 9 engines on the Falcon 9 has any effect of the effective nozzle exhaust expansion of the engines. Sort of like Arospike designs where performance in dense atmosphere and space both are optimized. The images of the Falcon 9 in the latter stag...