Not sure if his claim that 800 revolutions per second would clear the rain, didn't check the numbers. But I did some rough math, and if that 800/s is accurate, the center of the rope would be traveling roughly mach 14.5! Would make a hell of a noise, I'd wager.

I think Tesla does some innovative stuff - like using the worlds largest metallic moulds (built by some Italian company if I recall, which make those exclusively for Tesla). But ultimately Elon is a "hype man", and most of his promises have fallen flat (check out Thunderf00t's youtube channel - he debunks many scammy startups as well as Elon's claims, using high school chemistry and physics).

I do applaud Tesla for opening additional factories in Germany and China so quickly, but exponential growth (for any EV maker) is impossible - there's simply not enough easy-to-mine lithium in the world. (Maybe Elon is planning to mine some asteroids instead of going to Mars? who knows)

The GM battery tech isn't exciting or sexy, but it is a means to building a more affordable EV. Ford is already shipping F-150 Lightning (assuming its not affected by the same contactor recall as the Mach-E). Rivian has been (slowly) shipping trucks.
Where's the CyberTruck? I bet even the electric Silverado will start shipping before the CyberTruck.

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No surprise at Mach 8.6 this video could only be short.

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I don't recall David and Goliath. (As cartoons)
Wait....do you mean Davey and Goliath, the basis for Moral Orel? Somebody actually watched that?!

I have tons of Speed Racer stuff....shirts, rc mach 5, die cast models, etc. The movie was a big disappointment and a treat at the same time. I actually used Speed Racer clips in a public speaking presentation describing how cartoons mirrored the evolution of cultural norms from the 50's to 90's.

I never liked Clutch Cargo much, but I knew it. Kind of a poor man's Johnny Quest.

This I agree. ST is indisputably more science based than SW, and deservedly earned that respect. It's fun to argue whether warp drive can/can not exist and all that, but to just compare the different warp speed of different ships, across different classes is kind of pointless, as the numbers are arbitrary to begin with, no?

Say, if the video instead compares Mach speed between F-15/16/18/22 etc. and argue which fighter got the more advanced engines (accounting for weight/speed/aerodynamic profiles factors) then I see the point...

Hmmm......the site i ended up on indicated much less progress, perhaps I misunderstood and they were only discussing
DFRJ tests.
I trust wiki has it right.
I can't find any real info on the gll holod, but I would expect it was also launched with a solid rocket/missile if it wasn't pure propaganda. Scram jets just don't work under mach 4-5.

All you mention are a far cry from sustained hypersonic powered atmospheric flight, which is what we're talking about here.

You mentioned a ramjet, but scramjet engines are hardly an incremental improvement, they're an entirely different class of jet engine. Ramjet engines only do around mach 2.5- 5, scramjets 4-8+ theoretically. What's needed for a viable weapon imo is the next iteration of dual mode ramjets that can do both with one engine, that's a long way off. Public scramjet engine tests have only been successful in a few short 5 second+- burns so far, launched with conventional solid rockets.

"To date, he says, the US has conducted tests on this type of missile system but to his knowledge none have been successful, flying for just a few seconds. "

Basically, Putin made a laughable claim that Russia already has a mach 10 missile, so China and the USA jumped down the rabbit hole.

Kind of like when Reagan started up the SDI star wars BS. Which some people believe led to the USSR dramatically boosting their defense spending, nigh bankrupting themselves and breaking up as a country.

What is missing is the sound of clacking and scraping of the dogs nails on floors as he bolts at mach 3 to the next window.

Most airliners have wings designed to be used in low transsonic. They can't effectively go faster. They would literally lose lift if they went faster. Their wing shape is made to only delay the onset of shockwaves on top of the wing (flat-ish top), allowing it to safely creep closer to mach1 than otherwise, but not to operate within/past mach1.

Fan/propeller blades themselves are also mach limited.
(They can be designed to be supersonic, but then you end up with something like this... which in hindsight nobody wants : https://en.wikipedia.org/wiki/Republic_XF-84H)
A subsonic airfoil in a fan/propeller, operating near/at supersonic speed, loses the ability to move/redirect air, due to shockwave disruption of the airflow.

Fans/propellers with subsonic blades that spin at subsonic speeds are effectively speed limited. They lose efficiency above ~500 mph, where they begin to stop generating thrust as they travel faster. Their pitch has to increase higher and higher, until they are no longer much of an airscrew and more of a 'feathered' configuration.

Supersonic jet engines use intake devices (such as shock cones) to decelerate incoming air to subsonic speeds, so the compressor (itself a fan, i.e. a highly multi bladed propeller) can operate on that air to compress it and feed the engine combustion chambers.
Airliners have no intake devices to decelerate incoming air, and they would lose engine compression when entering near mach1 speeds.

Furthermore, their bypass fans (which are glorified propellers) would stop providing thrust.

You would need to design different planes (like the concorde). You can't just throttle up a modern airliner and go faster [than X limit] - like you can in a modern car.

-scheherazade