they literally said in the video at 0:22 that the aircraft is not in a flyable state anymore.

*V1, except that the pulse engine was on top of the body.

@@JZsBFF 'Doodlebug'

@@mark261166 Absolutely correct! I forgot about that nickname.

That looks cool!

No. Sorry.

Yes. Terrestrial helium-4 is mined and refined from the alpha decay of naturally occurring alpha emitters, like the 4n+2 (uranium) series, the 4n (thorium) series, and to a lesser extent, the 4n+3 (actinium) series, and to an even lesser extent than that, the 4n+1 (neptunium) series. When an alpha particle interacts with matter, like air, it will liberate electrons from other atoms, producing ions. As it loses kinetic energy, it will eventually capture two electrons, to produce helium-4, and the matter that it previously interacted with will lose those electrons, becoming ions. This is why alpha (and other charged particles) are considered to be _directly_ ionizing radiation. From a small or low-activity source, the amount of helium-4 produced is miniscule, but on a geological scale, you can acquire a lot of helium-4.