4 ms·
In my experience, specs are omitted in technical articles IFF somebody is trying to hide something. Like super short flight time. The MIT battery primer [1] st
by donquichotte 7y ago
In my experience, specs are omitted in technical articles IFF somebody is trying to hide something. Like super short flight time.
The MIT battery primer [1] states a specific energy of 150Wh/kg for Li-Ion cells. 150kWh would therefore weigh 1000kg.
Even at double the specific energy, the battery would still weigh in at 500kg, almost 80% of the maximum takeoff weight.
If there is a future for electric airplanes, it is going to be in fixed-wing applications.
[1] http://web.mit.edu/2.009/www/resources/mediaAndArticles/batteriesPrimer.pdf http://web.mit.edu/2.009/www/resources/mediaAndArticles/batt...
- simonvc 7y agoAnother project the "BYE" electric trainer is getting FAA certification right now, with 260Wh/kg Li-Ion
- simonvc 7y agohttps://www.byeaerospace.com/bye-aerospace-announces-first-flight-of-sun-flyer-2/ https://www.byeaerospace.com/bye-aerospace-announces-first-f...
- beenBoutIT 7y agoBell's Rocket Belt still looks impressive until somebody mentions the price and 30 second maximum flight time.
- FrojoS 7y agoBut it is fixed wing! Anyway, thanks for looking into it and doing the math.
- fock 7y agowhich means it's a little less stupid than what airbus is doing...