Not much more to be said so I post the intro to the article from Centauri Dreams, about an article/Theory by James Benford. Cool…
by PAUL GILSTER on JANUARY 22, 2021
The Wow! signal has a storied history in the SETI community, a one-off detection at the Ohio State ‘Big Ear’ observatory in 1977 that Jim Benford, among others, considers the most interesting candidate signal ever received. A plasma physicist and CEO of Microwave Sciences, Benford returns to Centauri Dreams today with a closer look at the signal and its striking characteristics, which admit to a variety of explanations, though only one that the author believes fits all the parameters. A second reception of the Wow! might tell us a great deal, but is such an event likely? So far all repeat observations have failed and, as Benford points out, there may be reason to assume they must. The essay below is a shorter version of the paper Jim has submitted to Astrobiology.
So one of the things that has kept me a little bit sane this last 9 months is SpaceX, Starship, and 24 Falcon launches… All I have to say is WOW and thank you Elon!
I’m in the periphery of the electric car business and have been for over twenty years now. The only thing that made me a believer was Tesla.
I’ve been watching space since I sat in front of the telly as Armstrong stepped off the lunar lander. The first time I believed that the final frontier finally within grasp was watching SpaceX doggedly pursuing landing Falcon boosters.
I’ve been a big believer in sub surface transportation, in particular for cargo and rapid medium distance, since high school! And the first time I saw it really taken seriously was Elon’s Boring Company.
It is really hard to think of another great innovator who had such a broad impact in the world. Brunel maybe (Victorian England) Edison, Tesla, Marconi, the Wrights, Sikorsky, Johnson…they all did great things only Brunel had as broad as Elon Musk. Maybe some of the other engineer entrepreneurs of the 1850’s to 1950’s working in what would become industrial powerhouses might have been similar but a different time and public culture hid them…maybe it’s just that Elon’s working today and as a geek I gravitate to him and the search engines feed my observer bias.
Formula One dominator Sebastian Vettel gave short shrift Saturday to the new, electric Formula E series, saying it would be far too quiet and was “not the future”.
Flying hybrid: This two-seater electric-gas airplane may be the first of many to take to the skies
Read more at MIT TR :Once a Joke, Battery-Powered Airplanes Are Nearing Reality
UVa’s Sustinere design for a 50-seat jet eschews batteries in favor of a turboelectric distributed propulsion (TeDP) concept – two 2,500shp turboshaft engines under the wing generating electrical power to drive six 3,300lb-thrust fans arrayed in a duct that wraps around the upper fuselage.
Read more at AWST: Battery or Superconductor – FAA Picks Hybrid Winners
The EADS IW concept uses a single large turbine engine to generate electricity to power six ducted fans that provide thrust. This allows propulsive and thermal efficiency to be optimized separately. The turbine engine can be optimized for thermal efficiency (turning fuel into shaft power) while the ducted fans increase effective bypass ratio and therefore propulsion efficient (turning shaft power into thrust).
Read more at AWST : eConcept – EADS’s Hybrid-Electric Airliner
Two years after Honeywell and Safran announced plans to develop an electric-drive system, the team is preparing to demonstrate a proof-of-concept system on an Airbus A320 at this year’s Paris air show.
Read more at AWST : Electric Taxi Puts On A Show At Paris By Guy Norris
The result of close collaborations with Finmeccanica companies – Selex ES, Ansaldo Breda, and Ansaldo Energia – and partner companies from Italy, UK, U.S. and Japan, the aircraft embeds some unuque features: aesthetically pleasing styling and aerodynamically unique tiltrotor configuration; carbon graphite exterior surfaces; High-Integrity Flight Control Computer and Actuator Control Unit; custom produced electric motor inverter and motor control algorithm; axial flux permanent magnet electric motors.
Read more at : http://theaviationist.com/2013/03/21/project-zero-images/
From: http://www.wired.com/autopia/2013/06/e-fan-electric-airplaneA tiny ducted fan aircraft, only about 40 hp and it can do aerobatics, 1 hour touring around or about 30 min of loops etc.
People still say that battery technology is throttling eTech but I see huge amounts of work based an nano tech, material tech, graphene / carbon tech, etc which points to continued significant improvements in battery energy density etc for many years to come. Along with the rapid improvement in light strong structures, much of it fueled by carbon fibre technology, the improvements in electric propulsion, electronics, sensors, etc one wonders if the Jetsons are really all that far off…
When the light turns green and the two-lane road begins an ess turn, it’s clear the Zero DS is a true motorcycle, not just a scooter with sport bike pretensions. This is an electric hoon machine that will put you ahead of almost anything on four wheels. Going from a standstill to 60 mph takes a tick over five seconds, and high-end torque slings the bike through on-ramps with aplomb. The Zero has the power to inspire that smirk of speed euphoria I crave from a bike — something that hasn’t been lost with the removal of a traditional internal combustion engine.
As a two-wheeled electric vehicle, the Zero DS is perfect. The engineering has accounted for everything important in a transportation vehicle. Riding the Zero, you think, this is how a civilized society should move about. This is a lithe and efficient vehicle, and an exemplar of what motorized travel should be: four-hundred pounds of weight moving between destinations silently, parking unobtrusively, and most of all, forcing the rider to be deliberate and unwasteful. Take only what can fit in the storage space and travel knowing that you have a finite range and must act resourcefully. Those restrictions, again, keep the Zero from being a true all-around motorcycle, but I like the idea of noble asceticism so long as the thrill of speed remains.