Many Commitments for Electric Training Plane
07-24-2019 | 11:43 AM
#11
Perennial Reserve
Joined: Jan 2018
Posts: 14,272
Likes: 260
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
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07-25-2019 | 07:46 PM
#13
In a land of unicorns
Joined: Apr 2014
Posts: 7,073
Likes: 103
From: Whale FO
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: Jan 2006
Posts: 45,179
Likes: 807
From: Engines Turn or People Swim
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: Feb 2007
Posts: 7,339
Likes: 1
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
Line Holder
Joined: Jun 2011
Posts: 527
Likes: 0
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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