Search found 19 matches
- Wed Aug 04, 2010 3:57 am
- Forum: General
- Topic: Halbach array fans for aeropropulsion
- Replies: 65
- Views: 51513
I have been following Inductrack for a while, and this is an obvious extension of the underlying technology. It is a brilliant passive magnetic levitation system, and as the years go by, I am increasingly surprised that it hasn't found more applications. At any rate, this was a nice find by GIThrust...
- Sun Aug 01, 2010 7:11 am
- Forum: News
- Topic: NewSpace 2010: Polywell and Vasimr
- Replies: 149
- Views: 54628
Nope, we've read a lot about space elevators. We know how many billion tons of mass must be put into GSO in order to build one. We know the tensile strengths of carbon nanotube, both theoretical and actual, and the current state of the materials science of it and how it is progressing. Both you and...
- Tue Jul 27, 2010 11:19 pm
- Forum: News
- Topic: NewSpace 2010: Polywell and Vasimr
- Replies: 149
- Views: 54628
Well, I had a fairly long post that the forum just ate when I hit the preview button. If you have concerns, the book I referenced will almost certainly address them. In summary, space elevators may be long, but they are not nearly as massive as people expect, and the seed ribbon is small enough for ...
- Tue Jul 27, 2010 7:16 pm
- Forum: News
- Topic: NewSpace 2010: Polywell and Vasimr
- Replies: 149
- Views: 54628
I'm surprised to see such strong critics of the space elevator concept in this forum. Once the ribbon material is manufacturable, it is a tractable engineering problem at a very reasonable scale, and considerably smaller than many other modern engineering projects. I have not encountered any concern...