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SpaceX - Launch UP



 
 
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  #1  
Old April 19th 15, 12:57 AM posted to sci.space.policy
William Mook[_2_]
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Default SpaceX - Launch UP

Launch & Land & Re-Launch
https://www.youtube.com/watch?v=yypBjVpDJZY

  #2  
Old April 21st 15, 06:53 AM posted to sci.space.policy
William Mook[_2_]
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Default SpaceX - Launch UP

On Saturday, April 18, 2015 at 7:57:25 PM UTC-4, William Mook wrote:
Launch & Land & Re-Launch
https://www.youtube.com/watch?v=yypBjVpDJZY


With 50 launches at $35 million to build, along with $1.4 million to recover and refurbish, a total of $105 million per booster and 50 launches - $2.1 million per launch, vs. $35 million per launch.

With one launch per week, this is 700 people to the build side and 700 people to the reuse/operations side and $22 million in raw materials and purchased parts.

Nano sat costs are extremely cost-effective.

13 tonnes per launch $2,692 per kg drops to $162 per kg. A 50 kg nano-sat payload drops from $134,600 to $8,100 as a secondary payload.

Off-world telecom unit

I mentioned earlier that a 50 kg nano-sat array costs $4.38 million. So, either of these costs is acceptable.

Off world power

A 13 tonne payload generating 20,000 Watts/kg orbits a 260 MW space based power plant. $35 million per launch adds $0.134 per watt. $2.1 million per launch adds $0.008 per watt.

The world spent $6 trillion on 143,851 terawatt hours in 2008. This likely has risen to 196,870 terawatt hours in 2015 and cost $10 trillion per year.. At 260 MW per power station it will require 86,378 power satellites on orbit.

With a 70% conversion efficiency, each power sat is a thin film concentrator that's 588 meters in diameter. Now the length of the geostationary orbit around Earth is 265,000 km. So each of these 588 m diameter stations are separated 3 km center to center. It will take 10 years launching at a rate of 1 per day, to provide for all of humanity's present needs with beamed power from space.

The value of this $155.7 million per year per station. This is $0.445 per watt-year. This is $0.05 per kWh.

A Tesla S stores 85 kWh and travels 265 miles. The average motorist travels 16,550 miles per year. This is 62.45 charges totaling 5,308.5 kWh per year. One billion electric vehicles replacing 1 billion internal combustion engines requires 5,308 terawatt hours. Now with an fuel economy of 24.6 mpg the average motorist consumes 642.76 gallons. Each gallon contains 33,700 watt-hours. So, each vehicle consumes 21.66 megawatt hours. 1 billion vehicles consume 21,660 terawatthours.

So, this shows the efficiency of an electric vehicle!

Fuel Energy Equivalent Electric
642.76 billion gallons -- 21,660 terawatt hours -- 5,308 terawatt hours


Similar savings in fuel are achievable with similar re-design for efficiency. This also avoids 6.2 billion tons of carbon dioxide per year.

47 pounds of Lithium in a Tesla S translates to 23.5 million tons of Lithium for a billion motor vehicles. There are 39 million tons of proven reserves of lithium. At present 600,000 tons per year are produced at present.

About 20 ppm by weight of average rock is lithium. Substantial lithium is recoverable from these sources if we can use the 7.5% of lithium that is in the form of lithium-6 to produce aneutronic fusion.

http://large.stanford.edu/courses/2010/ph240/eason2/

It takes about 40 MJ to process a kg of rock down to the atomic level. To get a kg of Lithium requires the processing of 50 tonnes of rock. This requires the release of 556 MWh of energy. This also retrieves 49.99 tonnes of other material that is very useful. At $0.05 per kWh this is $27,800 per kg of lithium, if everything else is free. If the lithium pays for 1% of the cost, and the other materials pay for 99% of the cost, lithium is $278 per kg.

http://ntrs.nasa.gov/search.jsp?R=19780044024

Another approach is to use powered road ways something along these lines.

https://www.scribd.com/doc/125565702...l-Power-Supply

To reduce or eliminate lightweight battery packs.

Of course, sodium sulfur batteries use much more abundant salt and sulfur, and were developed initially by Ford for an electric car in the 1960s.

http://40.media.tumblr.com/c0691844d...rijeo1_500.jpg

With the same advantages to overall energy use as the Tesla S.

Electric aircraft also save energy in the same manner. High flying aircraft that receive power directly from space whilst flying above the clouds, have the potential to radically alter aviation.

http://wordlesstech.com/2013/07/10/e...tric-aircraft/
http://lasermotive.com/products/uav-power-links/

The aircraft takes off under battery power, and acquires a beam from a satellite. The aircraft rides along powered by the beam for as long as necessary, then disengages, and uses battery power to make a powered touch down.

Drone aircraft that are smaller than today's airliners, combined with VTOL capabilities, provide flight on demand anywhere on Earth.

You signal an aircraft with your GPS enabled smartphone. An aircraft appears in the sky above, and lands at any convenient location. When you signal the aircraft, you enter your destination using a Google Earth type app. Time distance and rest breaks are all computed in, along with pricing. You approve the charges, and a lift-off time, and the aircraft flies to meet you.

This is the future of aviation, made possible with off-world laser beaming power sats, in combination with advanced battery systems and advanced drone technology.

Of course, packages are also delivered automatically the same way.

http://www.businessinsider.com.au/ma...drones-2014-11

I predicted this in these posts 30 years ago.




 




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