Harold White's warp drive and OA Sim Koning Posting Member Posts: 25 Threads: 5 Joined: Apr 2013 05-08-2013, 12:05 PM (This post was last modified: 05-29-2013, 09:17 AM by Sim Koning.) The Pdf on the NASA site was taken down, but I still have his paper on my computer (it was freely accessible on the NASA site). This is the bit I found most interesting. His version acts as a FTL "booster" for a more conventional propulsion system. Basically, he seems to be saying that a fusion rocket that travels at *edit* .2c will be boosted up to 20c *edit*. "The concept of operations as described by Alcubierre is that the spacecraft would depart the point of origin (e.g. earth) using some conventional propulsion system and travel a distance d, then bring the craft to a stop relative to the departure point. The field would be turned on and the craft would zip off to its stellar destination, never locally breaking the speed of light, but covering the distance in an arbitrarily short time period of time just the same. The field would be turned off a similar standoff distance from the destination, and the craft would finish the journey conventionally. This approach would allow a journey to say Alpha Centauri as measured by an earth bound observer (and spacecraft clocks) measured in weeks or months, rather than decades or centuries. A paradox identified in [6] is an issue that arises due to the symmetry of the energy density about the x = xs surface. When the energy density is initiated, the choice in direction of the +x-axis is mathematically arbitrary, so how does the spacecraft “know” which direction to go? Comparing Figure 1 to Figure 2 visually displays the asymmetry of the York Time and the symmetry of the energy density. Both sets of three frames were purposely aligned to make direct comparison easier. This asymmetry/symmetry paradox issue can be potentially resolved when considering the canonical form of the metric derived by using a gauge transformation in [6] as shown in equation 4. Using this new information, a modified concept of operations is proposed that may resolve the asymmetry/symmetry paradox. In this modified concept of operations, the spacecraft departs earth and establishes an initial sub-luminal velocity vi, then initiates the field. When active, the field’s boost acts on the initial velocity as a scalar multiplier resulting in a much higher apparent speed, = γ vi as measured by either an earth bound observer or an observer in the bubble. Within the shell thickness of the warp bubble region, the spacecraft never locally breaks the speed of light and the net effect as seen by earth/ship observers is analogous to watching a film in fast forward. Consider the following to help illustrate the point – assume the spacecraft heads out towards Alpha Centauri and has a conventional propulsion system capable of reaching 0.1c. The spacecraft initiates a boost field with a value of 100 which acts on the initial velocity resulting in an apparent speed of 10c. The spacecraft will make it to Alpha Centauri in 0.43 years as measured by an earth observer and an observer in the flat space-time volume encapsulated by the warp bubble. While this line of reason seems to resolve the paradox, it also suggests that the York Time may not be the driving phenomenon, rather a secondary result. In this physical explanation of the mathematics, the York Time might be thought of as perhaps a Doppler strain on space as this spherical region is propelled through space. A pedestrian analog to use to help envision this concept would be to consider the hydrodynamic pressure gradients that form around a spherical body moving through a fluid – the front hemisphere has a high pressure region while the rear hemisphere has a low pressure region. Analogously, the warp bubble travelling through space-time causes space to pile up (contract) in front of the bubble, and stretch out (expand) behind the bubble. « Next Oldest | Next Newest »

 Messages In This Thread Harold White's warp drive and OA - by Sim Koning - 04-20-2013, 09:09 AM RE: Harold White's warp drive and OA - by stevebowers. - 04-20-2013, 12:26 PM RE: Harold White's warp drive and OA - by Drashner1 - 04-20-2013, 01:00 PM RE: Harold White's warp drive and OA - by Sim Koning - 04-21-2013, 01:37 AM RE: Harold White's warp drive and OA - by Drashner1 - 04-21-2013, 02:23 AM RE: Harold White's warp drive and OA - by Sim Koning - 04-21-2013, 02:44 AM RE: Harold White's warp drive and OA - by Drashner1 - 04-21-2013, 08:50 AM RE: Harold White's warp drive and OA - by Sim Koning - 04-21-2013, 09:21 AM RE: Harold White's warp drive and OA - by stevebowers. - 04-23-2013, 05:50 AM RE: Harold White's warp drive and OA - by Sim Koning - 04-29-2013, 04:55 AM RE: Harold White's warp drive and OA - by Tachyon - 04-29-2013, 03:48 PM RE: Harold White's warp drive and OA - by Sim Koning - 05-08-2013, 12:05 PM RE: Harold White's warp drive and OA - by Stardust - 02-08-2014, 02:10 PM RE: Harold White's warp drive and OA - by Drashner1 - 05-10-2013, 11:31 AM RE: Harold White's warp drive and OA - by Sim Koning - 05-10-2013, 03:47 PM RE: Harold White's warp drive and OA - by Sim Koning - 05-28-2013, 10:40 AM RE: Harold White's warp drive and OA - by AmrlKJaneway - 06-01-2013, 05:23 PM RE: Harold White's warp drive and OA - by Tachyon - 06-06-2013, 04:12 PM RE: Harold White's warp drive and OA - by Sim Koning - 06-11-2013, 05:20 PM RE: Harold White's warp drive and OA - by iancampbell - 06-18-2013, 08:40 AM RE: Harold White's warp drive and OA - by Sim Koning - 07-25-2013, 09:21 AM RE: Harold White's warp drive and OA - by Dalex - 12-30-2013, 09:13 AM RE: Harold White's warp drive and OA - by Tachyon - 02-07-2014, 08:08 PM RE: Harold White's warp drive and OA - by AmrlKJaneway - 12-18-2016, 08:07 AM RE: Harold White's warp drive and OA - by stevebowers - 12-18-2016, 10:26 AM RE: Harold White's warp drive and OA - by AmrlKJaneway - 12-18-2016, 01:38 PM RE: Harold White's warp drive and OA - by stevebowers - 12-18-2016, 10:20 PM RE: Harold White's warp drive and OA - by AmrlKJaneway - 12-19-2016, 06:52 PM

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