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  #51  
Old 02-12-2021, 05:55 AM
David Z David Z is offline
 
Join Date: Aug 2010
Location: Thunder Bay Ontario
Posts: 562
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Nuclear fusion is 30 years away (still). By 2050, we'll be charging our EV-x for 65 cents.
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  #52  
Old 02-12-2021, 07:06 AM
YvesCH YvesCH is offline
 
Join Date: Feb 2015
Location: Basel, Switzerland
Posts: 229
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Quote:
Originally Posted by rv8ch View Post
Salty! and true. When I was a kid in the 70s we were sure we'd have flying cars before 1999. Not sure how they were supposed to be powered - I should have been paying more attention in school.

No doubt dead dinos are amazingly energy dense.

Look at the solar impulse - they kind of proved the concept of an electric aircraft - now it's up to the rest of us to take that work and run with it.

https://aroundtheworld.solarimpulse.com/

Some of the guys that built that are on this forum building RVs - I'm sure that they can chime in with their views.
Come on Mike,

I am not building anymore I am flying...

And yes Solarimpulse was quite a extreme project and not very userfriendly for the pilot.. But we also had to fly through the night several days in a row.

Some of my ex-colleagues are now working on small propulsion systems for GA aircraft but still there is no chance in more than 90min of flight.
check out https://www.h55.ch/products

Cheers Yves
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  #53  
Old 02-24-2021, 02:58 PM
kaa kaa is offline
 
Join Date: Dec 2013
Location: Boulder, CO
Posts: 112
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Quote:
Originally Posted by scsmith View Post
I canít prove this but my suspicion is that as battery energy density increases, the potential hazards increase too. Li-ion are already pretty dangerous. After working on an electric V-TOL for a couple of years At Zee.Aero I decided against an electric self-launch sailplane. The folks I worked with were top in the field and we had a couple of spectacular accidents. Boeing and Tesla have both had big mishaps and you can bet they really know what they are doing.
It is not a realm for amateurs. It is really easy to turn a $20,000 battery into hazmat.
Interesting, could you elaborate your thinking about sailplane? Is it the fact that high-density batteries don't tolerate being damaged or shorted or is there something more subtle to this?
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