Tek-Tips is the largest IT community on the Internet today!
Members share and learn making Tek-Tips Forums the best source of peer-reviewed technical information on the Internet!
-
Congratulations TugboatEng on being selected by the Eng-Tips community for having the most helpful posts in the forums last week. Way to Go!
Search results for query: *
- Users: BennyMic
- Order by date
-
Solar Sails - may not work
The Casimir effect has been measured and agrees within the error limits of the experiment. It involves the reflection of virtual photons by conducting sheets. Basically is the radiation pressure from the virtual photons on a conducting surface. They cannot be absorbed by the atom permanently...- BennyMic
- Post #33
- Forum: Spacecraft engineering
-
Solar Sails - may not work
The bottom line is radiation pressure (solar or otherwise) has been observed in accordance with the current theory in many ways, many times. As I said before, when one designs a spacecraft, extra stationkeeping propellant must be added to offset the deltaV from solar radiation pressure. The...- BennyMic
- Post #30
- Forum: Spacecraft engineering
-
Solar Sails - may not work
A rebuttal from someone in the know: http://www.planetary.org/solarsail/ss_and_physics.html I'll just add, the most compelling argument that Dr Gold is wrong, is that every s/c is designed with solar radiation pressure in mind...- BennyMic
- Post #6
- Forum: Spacecraft engineering
-
If not an engineer then what (& role of non-PE's)
BobPE(and any others who can help), How is getting a PE going to help me as an Aerospace engineer? This is not a sarcastic question, it's just that you state that it will many times in this thread, so could you tell me why or point me to a thread or post that does? Personally I think more laws...- BennyMic
- Post #34
- Forum: How to Improve Myself
-
Solar Sails - may not work
They could be by redshifting. The photon would actually be absorbed then emitted I guess, by the electron sea in the metal. Once abosrbed the sail is moving ever so slightly as compared to its previous rest frame. Thye emitted photon would be reshifted relative to it(the previous frame of the...- BennyMic
- Post #4
- Forum: Spacecraft engineering
-
Solar Sails - may not work
I'm guessing he is wrong as it would imply some very basic notions we have are wrong(Occam's razor). Reading his paper he isn't very rigorous in his analysis. He also makes no references or citations other than to Carnot. http://arxiv.org/html/physics/0306050 I'm betting the problem here is...- BennyMic
- Post #2
- Forum: Spacecraft engineering
