I reckon the first 6 words of that article capture his ideas perfectly.
From: Aus-soaring [mailto:aus-soaring-boun...@lists.base64.com.au] On Behalf Of Mike Borgelt Sent: Wednesday, September 28, 2016 10:48 AM To: Discussion of issues relating to Soaring in Australia. Subject: Re: [Aus-soaring] electric supersonic airliners At 09:47 AM 9/28/2016, you wrote: Me thinks someone needs to speak to luke regarding the availability of big wings. http://newatlas.com/axial-stack-battery-supersonic-electric-airliners/45537/ Methinks Mr Workman has never heard of aerodynamic heating when talking of SSTs. Yes, the pouch form factor battery is better for energy storage than the cylindrical one. Here's a rough guide to energy densities of various fuels/batteries. Even allowing for thermodynamic losses in heat engines, batteries have a long way to go to match hydrocarbon fuels. https://en.wikipedia.org/wiki/Energy_density For the spaceflight enthusiasts, Elon unveiled his plans for getting to Mars this morning. https://www.youtube.com/watch?v=_sY_5vSxmLQ Truly a BFR and a BFS. About 4 times the thrust and mass of the Saturn V Moon rocket. That won't be done electrically although a New Zealand/US company called Rocket Lab is using Lithium - ion batteries to drive the turbopumps in the engines of their small satellite launcher. Mike Borgelt Instruments - design & manufacture of quality soaring instrumentation since 1978 www.borgeltinstruments.com <http://www.borgeltinstruments.com/> tel: 07 4635 5784 overseas: int+61-7-4635 5784 mob: 042835 5784 : int+61-42835 5784 P O Box 4607, Toowoomba East, QLD 4350, Australia
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