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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif'><o:p> </o:p></span></p><p class=MsoNormal><b><span style='font-size:11.0pt;font-family:"Calibri",sans-serif'>From:</span></b><span style='font-size:11.0pt;font-family:"Calibri",sans-serif'> extropy-chat [mailto:extropy-chat-bounces@lists.extropy.org] <b>On Behalf Of </b>William Flynn Wallace<br><b>Sent:</b> Sunday, October 30, 2016 5:31 PM<br><b>To:</b> ExI chat list <extropy-chat@lists.extropy.org><br><b>Subject:</b> [ExI] that's a big battery!<o:p></o:p></span></p><p class=MsoNormal><o:p> </o:p></p><div><div><p class=MsoNormal><span style='color:black'></span><span style='font-size:18.0pt;font-family:"Georgia",serif;color:black'> Within five years, according to the white paper, Uber expects the market to produce a fully electric, vertical-takeoff-and-landing plane that can fly 100 miles at about 150 mph, carrying multiple passengers and a pilot. (from <a href="http://wired.com">wired.com</a>)</span><span style='color:black'><o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:18.0pt;font-family:"Calibri",sans-serif'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:18.0pt;font-family:"Calibri",sans-serif'>OK I expect it will not. Not five years from now, not later than that. <o:p></o:p></span></p><p class=MsoNormal><span style='font-size:18.0pt;font-family:"Calibri",sans-serif'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:18.0pt;font-family:"Calibri",sans-serif'>Vertical takeoff and landing takes crazy high power, not compatible with stored electric energy. Internal combustion is hard to beat for carrying energy aloft. I don’t think we are close to fully electric aircraft. <o:p></o:p></span></p><p class=MsoNormal><span style='font-size:18.0pt;font-family:"Calibri",sans-serif'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:18.0pt;font-family:"Calibri",sans-serif'>A 40 passenger VTOL is difficult even with modern turbojet engines such as those found on the V-22 tilt-rotor. Those engines are lower efficiency than high-bypass turbos because they need to produce peak power on takeoff.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:18.0pt;font-family:"Calibri",sans-serif'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:18.0pt;font-family:"Calibri",sans-serif'>spike<o:p></o:p></span></p></div></div></div></body></html>