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caesar novus

Illuminating video/youtube series?

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During lockdown or whatever, have you found some youtube/vimeo/whatever channels that are both educational and fun? In the ancient Rome realm, I have been subscribed to well known popularizing scholars Darius Arya and Mary Beard, but would welcome other suggestions. Darius has a channel with odds and ends at https://www.youtube.com/c/RomancultureOrgWeDigRome/videos and "Dame" Mary has various colorful documentaries found at https://www.youtube.com/results?search_query=mary+beard

Edited by caesar novus

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The grizzled godfather of that Top Gear TV car series gave top marks to this car technology channel I subscribe to https://www.youtube.com/user/EngineeringExplained/videos. It is so clever in explaining pros and cons of car tech that I almost forget that cars bore me (aside from my crush on econo supercar Alfa Romeo 4C shown below). I like the way he lays out issues by diagramming on a whiteboard, for instance why an electric car is efficient but electric trucks tend to be a disaster. Can't really dispute his physics and math.

I like the way he explains for example how dumb the typical approach of adding a turbo to a small engine is - to avoid damaging knocks they have to dump in extra fuel simply to cool the cylinders, not even to burn and extract energy! Then he explains innovative combustion approaches that keep rolling out to challenge his Tesla.

Alfa-Romeo-4c-full-stripe_600x.jpg

Edited by caesar novus

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One of the most eye opening nerdy tech channels for me is https://www.youtube.com/channel/UCynGrIaI5vsJQgHJAIp9oSg/videos and especially his deep comparisons of ww2 fighter plane tech. They have a dry feel since he assembles them while holed up in far flung hotels as a resting airline pilot. But his well documented findings can be amazing. Allow me to exaggerate his issues a bit without his lengthy nuances, so as to show how important the themes may be.

For instance the usual narrative is backwards, where the Brits gifted Merlin engine technology to make the US P51 a war winner. Actually the Merlin design incorporated US style enhancements all jammed oddly to squish into the Spitfires narrow cowl, for instance with both superchargers sharing a shaft and not a proper intercooler between the stages. It was complex and the US ripped them out of P40s in favor of boring Allisons. The Me109 had similar space problems where they couldn't fit a second stage supercharger in the cowl, but at least made the first stage uniquely variable speed.

Anyway back to the P51, which maybe shouldn't have been developed anyway. The earlier available P47 was capable of escorting bombers anywhere with multiple use of British paper mache drop tanks. A well documented conspiracy prevented use of more than occasional drop tanks because the B17 was supposed to defend itself. The P47s weren't used when bombers had such high death rates that they were grounded for long while. Later Greg shows the coverup in denigrating p47 ability and pretending waiting for unique P51s was needed.

Well, I am explaining this poorly, so will try a diagram showing why US fighters other than p51 and Corsair tended to be chubby. Effective multistage super and turbochargers take a lot of space for ductwork and intercoolers. Here is a p47 view which doesn't do justice for it's sleeker head-on profile:

06.jpg

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