Author Archives: gravityloss

SpaceX Did It – What It Should Do Next

Congratulations to SpaceX who landed the first stage intact. Assuming cost is roughly related to stage mass and engine count, reusing the first stage saves 9/10 of the whole rocket cost. If they can run the stage ten times, that … Continue reading

Posted in Architecture, Depot, Design, engines, industry, Launchers, Lunar, RLV:s, Spacecraft, SpaceX, Transportation | Leave a comment

“Space Is Hard” Is The Wrong Answer

They say “Space is hard” Orbital Sciences crashed a rocket equipped with two 40 year old engines. Physically that old. They were an interim solution and they were working towards new engines. We don’t know at this point if the … Continue reading

Posted in Design, engines, Homebuilt, industry, Journalism, RLV:s, Suborbital | Tagged , , , , | Leave a comment

Building rockets like disposable gloves

There’s two fundamental approaches to lower space launch cost: K-strategy: Building sophisticated reusable rockets that can fly quickly again after landing. r-strategy: Instead building simple expendable rockets by the mass as cheaply as possible. Firefly, looks to do just the … Continue reading

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Trying tumblr again

http://splitwire.tumblr.com

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Skysails

These ram air kites by Skysails power flying in a figure eight circuit can develop power and also work as ship propulsion. Ideas like this have probably been toyed by many, it’s nice to see some execution. The biggest current product is … Continue reading

Posted in airplane, Energy, Transportation | Tagged , , , | 3 Comments

Elon Musk’s Hyperloop

What is it? A new mode of transportation that’s supposed to be very fast like Concorde, on ground level and requires no rails. What could it be? Dylan thinks it’s a tube mail system. Jacques thinks so as well, and says … Continue reading

Posted in Transportation, Uncategorized | Tagged , , | 3 Comments

Long time no post

Haven’t really had the time and stuff feels so clunky. WordPress feels quite old-fashioned. With modern blogging platforms you ought to be able to drag photos to upload in the background and whatever. I have valtteri.openphoto.me for occasional photos but … Continue reading

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Flynano prototype shown to public

Flynano, the sub-70 kg carbon fiber seaplane designed to go around regulations by sheer lack of mass. Their first prototype that was retired and is now exhibited at verkkokauppa in Jätkäsaari, Helsinki, Finland. I took a few photos, more after … Continue reading

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Cameras and physics of light

This should be highschool level deduction. The basics In short: Assuming equivalent sensor technology where read noise or thermal noise doesn’t dominate: 1. Low light performance (low noise in low light photos) is dependent on absolute aperture size 2. Dynamic … Continue reading

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Winter Bicycling in Style

http://kristakeltanenblog.com/2012/02/winter-tweed-run-helsinki-2012/ …

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