Meanwhile at Zadar, Croatia. Since 2008..An update:
They have their first public trial installation down now. It doesn't seem to be working out quite the way they thought...
If only it were just hundreds of thousands. At last count, between local/state government agencies and the Obama Administration they've received just over 2 million taxpayer dollars. $1.6 million in the form of two $750K SBIR grants from the US DOT plus an initial $100K SBIR grant. https://en.wikipedia.org/wiki/Solar_Roadways#HistorySo after giving them hundreds of thousands of taxpayer's money, it turns out the project cracks at the points where it was expected.
Great use of public funds there!
Half a million dollars for just this installation and this is what they produce?Sebastian Anthony noted in ExtremeTech that the cost to replace all roads in the United States with Solar Roadways panels would come to approximately $56 trillion, based on Scott Brusaw's cost estimate of $10,000 for a 12?12-foot section. The USDOT announcement of Phase IIB funding in December 2015 mentioned that because the solar cells were still manufactured by hand, they were "very costly to produce".
The first installation for Solar Roadways SR3 panels in Sandpoint, Idaho covered a walking only area of 150 square feet, at an estimated cost of $500,000. This is 50 times Brusaw's cost estimate for a similar sized area of roadway.
Circular runways stop making sense when you remember one element of reality is "crosswinds." Also when you remember how an airplane actually turns.The circular runways make some sense. Solar Roadways is a case of too much sugar combined with a bad acid trip.
Beat me to it. To add to that, runways are typically arranged in such a fashion that planes take off into a headwind to increase lift and decrease the distance one has to travel on the ground.Circular runways stop making sense when you remember one element of reality is "crosswinds." Also when you remember how an airplane actually turns.
There are no crosswinds in a runway with literally any direction of take off possible. If the winds blow from 265, there would be ways to calculate according to your planes performance, to start the take off run from somewhere in the circle so you are at Vr at the point where your nose is pointing at roughly 265. Landing would be the same thing.Beat me to it. To add to that, runways are typically arranged in such a fashion that planes take off into a headwind to increase lift and decrease the distance one has to travel on the ground.
they should stack several runways on top of each other! just like a carpark, then you don't have this problemYou couldn't have 2 or 3 airplanes taking off and landing at the same time if winds are over, say, 5 or 10 kts though, one of them would be landing with a tail wind and that's not ideal