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  • Posted in: Open Forum

    Hello Mark, an energy density of 3 kwh/kg of battery weight would be  - equal to kerosene-, diesel- or gasoline-driven engines with 30% efficiency   - the 10-fold density of state-of-the-art lithium-ion batteries  - the 5-fold density of next-generation ...

  • Posted in: Open Forum

    It can efficient enough that we have some STOL designs which are entirely solar- and battery-powered. The latest is a 90-foot-long cargo plane which is designed to fly 4,000 miles on batteries alone, and which is skinned with 48%-efficient multi-junction ...

  • Posted in: Open Forum

    Hello Nicolas, your question keeps me busy since a couple of years – and I have two answers: When I just look at low-quantity short- and midrange transportation of people and goods mainly in and between urban areas – up to approx. 1.000 ...

  • Posted in: Open Forum

    Hi everyone, I was wondering if anyone had any numbers as to how efficient electric aviation is especially compared to EVs? I've been asked to justify why I write so much about it when it takes so much energy. I thought I'd answer it with numbers and ...

  • Posted in: Open Forum

    We've updated the all-star line-up for our acoustics panel at Heli-Expo. In addition, we now have the information on the HAI Urban Air Mobility Forum discussion. See update below, or check www.vtol.org/evtol-revolution for the latest details. (The VFS ...

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