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Archive for the ‘engineering’ category: Page 256

Oct 1, 2012

Debunking Antimatter Rockets for Interstellar Travel

Posted by in categories: education, engineering, physics, policy, space

Previous Post in this Debunking Series.

Why is it necessary to debunk bad or unrealistic technologies? If don’t we live in a dream world idealized by theoretical engineering that has no hope of ever becoming financially feasible. What a waste of money, human resources and talent. I’d rather we know now upfront and channel our energies to finding feasible engineering and financial solutions. Wouldn’t you?

We did the math required to figure out the cost of antimatter fuel one would require just to reach 0.1c and then cost at that velocity, never mind about reaching Alpha Centauri.

Table 2: Antimatter Rocket Fuel Costs to Alpha Centuariat 0.1c (in metric tons)
Source of Estimates Amount of Antimatter Required Maximum Velocity

Spacecraft Mass

Continue reading “Debunking Antimatter Rockets for Interstellar Travel” »

Oct 1, 2012

Debunking Conventional Rocket Interstellar Travel Once And For All

Posted by in categories: education, engineering, physics, policy, space

Previous Post in this Debunking Series.

Why is it necessary to debunk bad or unrealistic technologies? If don’t we live in a dream world idealized by theoretical engineering that has no hope of ever becoming financially feasible. What a waste of money, human resources and talent. I’d rather we know now upfront and channel our energies to finding feasible engineering and financial solutions. Wouldn’t you?

We did the math required to figure out how much fuel one would require just to reach 0.1c and then cost at that velocity until you reach Alpha Centauri and reverse thrust to orbit the star.

Table 1: Conventional Rocket Fuel Costs to travel to Alpha Centauri at 0.1c
Maximum Velocity (km/s)

1980’s cost ($/lb)

Continue reading “Debunking Conventional Rocket Interstellar Travel Once And For All” »

Oct 1, 2012

Liquor & Glass — Sellafield/BNFL Keeping a Lid on It

Posted by in categories: engineering, ethics, nuclear energy, policy, sustainability, transparency

Fukushima reawakened the world to the dangers of nuclear power, and reading back over Fearing Sellafield (2003) by Colum Kenny recently, I reflect back on how deflective and dishonest industry can be to steer clear of critical opinion. Seeing parallels suggested in other industries today, I wonder if much has really changed.

Highly Active Liquor (HAL) produced by the reprocessing of irradiated nuclear fuel at Sellafield, reached a level of 1,500 cubic meters in storage at its peak circa 2001, the capacity of a 50 meter Olympic swimming pool. Particularly unstable, a disruption to electricity & water coolant could result in such liquor boiling, overloading the ventilation filtration systems and leading to a nuclear accident. Containing about 80 times the amount released during the 1986 Chernobyl accident according to a report for the European Parliament at that time, we are rather fortunate such a serious accident never occurred. This analysis was provided by what became known as The WISE Report — so called due to associated with the World Information Service on Energy (WISE) in Paris. In response BNFL set out to reduce this liquor to a solid form known as ‘glass’ — borosilicate glass — much safer than when kept in liquid form, and put in storage — though much of it still remains to be vitrified.

In 2000/2001, the Nuclear Installations Inspectorate (NII) of the HSE published a number of reports on aspects of Sellafield that led to causes of concern. One report in particular entitled ‘an investigation into the falsification of pellet diameter data in the MOX demonstration facility at the BNFL Sellafield site and the effect of this on the safety of MOX fuel in use’ suggested deliberate dishonesty in keeping records. BNFL subsequently complied with most of these recommendations.

Authors of the WISE report however still had concerns regarding increases in levels in certain sea discharges and aerial releases, and inconsistent with the UK’s obligations under the OSPAR Convention. It stated that the deposition of plutonium within 20km of Sellafield attributable to aerial emissions has been estimated at 160–280 billion becquerels — several times the plutonium fallout from all atmospheric nuclear weapons testing, and that 250kg-500kg of plutonium from Sellafield has been absorbed as sediments on the bed of the Irish sea ‘representing a long-term regional hazard of largely unknown proportions’. The report had been treated with caution by the European Commission and conveniently dismissed by the National Radiological Protection Board in the UK by claiming that some of the conclusions drawn in the report were based on ‘lacking objectivity’. It seems that governments are always bent towards safeguarding industry first, leaving environmental concerns and the health of our Mother Ship as a secondary issue.

Sep 26, 2012

On Leaving the Earth. Like, Forever. Bye-Bye.

Posted by in categories: asteroid/comet impacts, cosmology, defense, engineering, existential risks, futurism, human trajectories, lifeboat, military, singularity, space


Technology is as Human Does

When one of the U.S. Air Force’s top future strategy guys starts dorking out on how we’ve gotta at least begin considering what to do when a progressively decaying yet apocalyptically belligerent sun begins BBQing the earth, attention is payed. See, none of the proposed solutions involve marinade or species-level acquiescence, they involve practical discussion on the necessity for super awesome technology on par with a Kardeshev Type II civilization (one that’s harnessed the energy of an entire solar system).

Because Not if, but WHEN the Earth Dies, What’s Next for Us?
Head over to Kurzweil AI and have a read of Lt. Col. Peter Garretson’s guest piece. There’s perpetuation of the species stuff, singularity stuff, transhumanism stuff, space stuff, Mind Children stuff, and plenty else to occupy those of us with borderline pathological tech obsessions.

[BILLION YEAR PLAN — KURZWEIL AI]
[U.S. AIR FORCE BLUE HORIZONS FUTURE STUFF PROJECT]

Sep 22, 2012

Debunking the Black Hole Interstellar Drive

Posted by in categories: business, engineering, fun, physics, policy, space

Louis Crane and Shawn Westmoreland co-authored the paper Are Black Hole Starships Possible? (http://arxiv.org/abs/0908.1803) that suggested that one could use Small Black Holes to propel starships close to the velocity of light for interstellar travel. To give them credit, they stated that this is at the “edge of possibility” and would only be possible in the very distant future:

“The purpose of this paper is to investigate whether it is possible to build artificial BHs of the appropriate size, and to employ them in powerplants and starships. The conclusion we reach is that it is just on the edge of possibility to do so, but that quantum gravity effects, as yet unknown, could change the picture either way… Many questions which arise in this program lead to calculations in general relativity which have not been done. Whatever the other merits of our proposal, we are confident it will pose many interesting problems for classical and quantum relativity.”

Note, BH = Black Holes

That is it. Crane & Westmoreland were presenting an academic exercise to pose “many interesting problems for classical and quantum relativity”.

Continue reading “Debunking the Black Hole Interstellar Drive” »

Sep 11, 2012

Only One Interstellar Travel Community Will Succeed

Posted by in categories: engineering, finance, philosophy, physics, space

There four camps that comprise the present day interstellar travel community and only one camp will succeed.

The first camp, the conventional rocket camp, believes it is possible using conventional rockets (chemical, ion, nuclear or antimatter) to realize interstellar travel to our nearest star Alpha Centauri. One of the problems is the costs, estimated at an unthinkably large $238,596 billion and upwards. It is several thousand times greater if we choose to use antimatter.

Further, John Eades, a former senior scientist with CERN, in his March/April 2012 Skeptical Inquirer article “Antimatter Pseudoscience”, lays down the reasons why antimatter based propulsion will never be technologically feasible.

Black Hole of wealth. One down three to go.

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Sep 6, 2012

Flexible Path Flim Flam revised

Posted by in categories: asteroid/comet impacts, biotech/medical, business, counterterrorism, defense, economics, education, engineering, ethics, events, existential risks, futurism, geopolitics, habitats, human trajectories, life extension, lifeboat, media & arts, military, nuclear weapons, open source, physics, policy, space, transparency

I do not regret voting for this President and I would and will do it again. However.……I am not happy about our space program. Not at all. One would think there would be more resistance concerning the privatization of space and the inferior launch vehicles being tested or proposed. Indeed there would be objections except for a great deception being perpetrated on a nation ignorant of the basic facts about space flight. The private space gang has dominated public discourse with very little answering criticism of their promises and plans.
This writer is very critical of the flexible path.

It is a path to nowhere.

Compared to the accomplishments of NASA’s glory days, there is little to recommend the players in the commercial crew game. The most fabulous is Space X, fielding a cheap rocket promising cheap lift. There is so little transparency concerning the true cost of their launches that one space-faring nation has called the bluff and stated SpaceX launch prices are impossible. The Falcon 9, contrary to stellar advertising, is a poor design in so many ways it is difficult to know where to begin the list. The engines are too small and too many, the kerosene propellant is inferior to hydrogen in the upper stage, and promising to reuse spent hardware verges on the ridiculous. Whenever the truth about the flexible path is revealed, the sycophants begin to wail and gnash their teeth.

The latest craze is the Falcon “heavy.” The space shuttle hardware lifted far more, though most of the lift was wasted on the orbiter. With 27 engines the faux heavy is a throwback to half a century ago when clusters of small engines were required due to nothing larger being available. The true heavy rocket of the last century had five engines and the number of Falcon engines it would take to match the Saturn V proves just how far the mighty have fallen.

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Sep 5, 2012

Questioning the Foundations of Physics to Achieve Interstellar Travel: Part 3

Posted by in categories: business, defense, engineering, physics, space

Part 2 Here

Need For New Experiments To Test Quantum Mechanics & Relativity
We now have a new physics, without adding additional dimensions, that challenge the foundations of contemporary theories. Note very carefully, this is not about the ability of quantum mechanics or relativity to provide exact answers. That they do extremely well. With Ni fields, can we test for which is better or best?

A better nomenclature is a ‘single-structure test’, a test to validate the structure proposed by a hypothesis or theory. For example, Mercury’s precession is an excellent single-structure test for relativity, but it does not say how this compares to say, quantum gravity. On the other hand, a ‘dual-structure’ test would compare any two different competing theories. The recent three photon observation would be an example of a dual-structure test. Relativity requires that spacetime is smooth and continuous but quantum gravity requires spacetime to be “comprised of discrete, invisibly small building blocks”. This three photon observation showed that spacetime was smooth and continuous down to distances smaller than predicted by quantum gravity. Therefore, suggesting that both quantum foam and quantum gravity maybe in part or whole invalidated, while upholding relativity.

Therefore, the new tests would authenticate or invalidate Ni fields as opposed to quantum mechanics or relativity. That is, it is about testing for structure or principles not for exactness. Of course both competing theories must first pass the single-structure test for exactness, before they can be considered for a dual-structure test.

Continue reading “Questioning the Foundations of Physics to Achieve Interstellar Travel: Part 3” »

Sep 3, 2012

Questioning the Foundations of Physics to Achieve Interstellar Travel: Part 2

Posted by in categories: business, defense, engineering, physics, space

Part 1 of this Essay is here

The Missing Link, The Ω Function
General Relativity is based on separation vectors. Splitting this separation vector into two equations, gives one part a function of mass and the other a vector-tensor function. This gives rise to the question, can the mass part be replaced by something else say an Ω function, where Ω is as yet undefined but not a function of mass? Maybe the Ω function should be a description of quark interaction, and not mass?

Now it becomes obvious that the theoretical physics community has focused on the vector-tensor part to the complete omission of the Ω function. That is, there is definitely the opportunity to question the foundations of physics.

Looking at the massless equation for gravitational acceleration g = τc2, change in time dilation divided by the change in distance is what describes a gravitational field. A small body orbiting the Earth has a certain velocity which can be converted to time dilation. Change the orbital radius of the small body by a small amount, less or more, gives a new orbital velocity and a new time dilation. Therefore, divide this change in time dilation by the change in height and multiply by the velocity of light squared, gives the gravitational acceleration present. The same is with a centripetal motion. Use the velocity along the radius at any two points. Determine the change in time dilation then divide this change in time dilation by the change in radius, the distance between the two points. Then multiply by the velocity of light squared, gives the acceleration present.

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Sep 2, 2012

Verne, Wells, and the Obvious Future Part 3

Posted by in categories: biotech/medical, counterterrorism, defense, education, engineering, ethics, events, futurism, geopolitics, life extension, media & arts, military, policy, robotics/AI, space, sustainability, transparency

A secret agent travels to a secret underground desert base being used to develop space weapons to investigate a series of mysterious murders. The agent finds a secret transmitter was built into a supercomputer that controls the base and a stealth plane flying overhead is controlling the computer and causing the deaths. The agent does battle with two powerful robots in the climax of the story.

Gog is a great story worthy of a sci fi action epic today- and was originally made in 1954. Why can’t they just remake these movies word for word and scene for scene with as few changes as possible? The terrible job done on so many remade sci fi classics is really a mystery. How can such great special effects and actors be used to murder a perfect story that had already been told well once? Amazing.

In contrast to Gog we have the fairly recent movie Stealth released in 2005 that has talent, special effects, and probably the worst story ever conceived. An artificially intelligent fighter plane going off the reservation? The rip-off of HAL from 2001 is so ridiculous.

Fantastic Voyage (1966) was a not so good story that succeeded in spite of stretching suspension of disbelief beyond the limit. It was a great movie and might succeed today if instead of miniaturized and injected into a human body it was instead a submarine exploring a giant organism under the ice of a moon in the outer solar system. Just an idea.

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