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Electrified wingsuit from BMW reaches 186MPH on first flight

robbreport.com

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Re: Electrified wingsuit from BMW reaches 186MPH on first flight

#201

Earlier quoted context omitted.

Haven’t bothered :) Only “toy” EDF models, performance from an 8KW system revving at 60K rpm at 10S (10 lipo cells in series) swinging a 19” folding prop is on par with a mini turbine in terms of performance (0-> 180mph+ in under 2 seconds). Granted this is for 2 meter gliders, but I would expect similar efficiencies in larger scale applications (the bmw EDF is not that much larger than RC).

That's crazy. For a non-RC dude, how much thrust does that produce, and how much did it cost?

The $ sounds high, but it’s nothing compared to the time that goes into building and preparing... https://youtu.be/oCS84I8vJK8

Re: Electrified wingsuit from BMW reaches 186MPH on first flight

#202
post #140

Earlier quoted context omitted.

They're outside and (in the last congratulatory shot) almost all wearing masks. I think that is defensible.

It's not defensible, because you still have to social distance even when outside.

FWIW, this paper (on the danger of thanksgiving dinners...) has some graphs showing the difference between transmission during indoors vs. outdoor meetings. The difference is tremendous.

Slide 6 - the barely visible brown line hugging the x-axis is outdoors.

https://drive.google.com/file/d/1xmN0e4svqi6QZQtzmSjXU12znWB...

Re: Electrified wingsuit from BMW reaches 186MPH on first flight

#203

Earlier quoted context omitted.

It seems to me like there's a good future for electric VTOL. Whether for package delivery or for carrying people, you can take off vertically, and then transition to a horizontal flight regime using wings that's more energy efficient, so you can get more range.

This feels like the golden path to me, too. Lilium is claiming 300km range at 300km/hour, and appears to transition nicely to horizontal flight. Maybe not a great glide ratio on those stubby little wings, but it looks safer than quadcopters. They don't need all 36 ducted fans for normal flight, so eating a bird shouldn't spell death. Has anybody else shown off similar craft? Uber Air's eVTOL looks about 50% CGI/50% h…

My layman's aerodynamic hunch says that Lilium is on the right design track for practical, reliable, long-range electric VTOL aircraft.

There's two critical ingredients: Transitioning out of powered lift immediately after takeoff, and having a battery mass fraction that's as high as possible. Obviously, VTOL & payload limits the latter.

Multicopter designs won't work; their power requirements are too high.

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