I'm still waiting for the deltoid pumpkin seed John McPhee wrote about in 1973
I'd also like an adult bike/trike based on a folding wheelchair
I can carry up a flight of stairs
with regenerative braking
possibly a weather faring
& the ability to serve as
a human power generator
just in case.
Their lift depends only on volume. Airplane lift depends on wing area and speed (and thus on power.) The airship has a very constrained design space, where the answer is always to make it bigger.
I’ve heard that every 5y for the last 40y. Nobody wants an enormous and enormously expensive vehicle with the capacity of a bus and the speed of a horse. Which is a shame because they look cool.
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Airships make logistics of installing turbines MUCH simpler. No more crazy overland transport of the blades.
Well, I thought he had some good arguments for it.
I'd also like an adult bike/trike based on a folding wheelchair
I can carry up a flight of stairs
with regenerative braking
possibly a weather faring
& the ability to serve as
a human power generator
just in case.