Many Commitments for Electric Training Plane
07-24-2019, 11:43 AM
#11
Perennial Reserve
Joined APC: Jan 2018
Posts: 12,115
Making batteries five times more efficient (ie specific energy) than today's commercially available batteries equates to the absolute theoretical chemical max of about 1,000 Wh/Kg.
Kerosene specific energy is 12,000 Wh/Kg.
If you have an interest in electric planes, you need to understand that 12 to 1 specific energy advantage of jet fuel. And that's only with a 500% improvement in current batteries (theoretical max).
Kerosene specific energy is 12,000 Wh/Kg.
If you have an interest in electric planes, you need to understand that 12 to 1 specific energy advantage of jet fuel. And that's only with a 500% improvement in current batteries (theoretical max).
https://www.forbes.com/sites/kionasm.../#5b3e2544260a
[/RANT]
07-25-2019, 07:46 PM
#13
In a land of unicorns
Joined APC: Apr 2014
Position: Whale FO
Posts: 6,595
Making batteries five times more efficient (ie specific energy) than today's commercially available batteries equates to the absolute theoretical chemical max of about 1,000 Wh/Kg.
Kerosene specific energy is 12,000 Wh/Kg.
If you have an interest in electric planes, you need to understand that 12 to 1 specific energy advantage of jet fuel. And that's only with a 500% improvement in current batteries (theoretical max).
Kerosene specific energy is 12,000 Wh/Kg.
If you have an interest in electric planes, you need to understand that 12 to 1 specific energy advantage of jet fuel. And that's only with a 500% improvement in current batteries (theoretical max).
Still way too far out to be practical, obviously.
07-26-2019, 07:21 AM
#14
Prime Minister/Moderator
Joined APC: Jan 2006
Position: Engines Turn Or People Swim
Posts: 40,047
Still have transmission and control losses, but the inherent efficiency of electric motors would enable better use of the energy deliver to the motor. Might close the gap to 8 to 1, bearing in mind there are some incremental improvements in jet engines coming down the pipe.
07-26-2019, 07:18 PM
#15
:-)
Joined APC: Feb 2007
Posts: 7,339
Making batteries five times more efficient (ie specific energy) than today's commercially available batteries equates to the absolute theoretical chemical max of about 1,000 Wh/Kg.
Kerosene specific energy is 12,000 Wh/Kg.
If you have an interest in electric planes, you need to understand that 12 to 1 specific energy advantage of jet fuel. And that's only with a 500% improvement in current batteries (theoretical max).
Kerosene specific energy is 12,000 Wh/Kg.
If you have an interest in electric planes, you need to understand that 12 to 1 specific energy advantage of jet fuel. And that's only with a 500% improvement in current batteries (theoretical max).
07-31-2019, 01:15 PM
#16
Gets Weekends Off
Joined APC: Jun 2011
Posts: 522
My question is, what is the recharge time on these? If they are targeting the flight training market, many flights schools fly back to back flights in the same airplanes all day long. Even an hour recharge time would be a significant issue to many flight school as far as aircraft utilization goes.
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