site banner
PaperclipPerfector  3mo ago (text post)   2831 thread views

Friday Fun Thread for January 26, 2024

Be advised: this thread is not for serious in-depth discussion of weighty topics (we have a link for that), this thread is not for anything Culture War related. This thread is for Fun. You got jokes? Share 'em. You got silly questions? Ask 'em.

3
Top Bottom Old Controversial Comments
Jump in the discussion.

No email address required.

So I watched two youtube videos recently. "How a WWI Biplane works": https://youtube.com/watch?v=hgG4kGW_G9Y&t=2s and "How a P-51 Mustang Works": https://youtube.com/watch?v=hjsrqMe0B3s

I ended up surprised on multiple points. First, the WWI plane is simultaneously more complex and more well-thought-out than I assumed, but at the same time much flimsier than they might appear, and one gets a clear feeling for how young a field aviation was at the time. And then the WWII plane, designed maybe 25 years later. By comparison, the WWI plane is a folding chair strapped to a lawn mower tied to a kite, with some guns thrown in, whereas the WWII plane is just about one calculator and a booster rocket short of being the space shuttle. I honestly expected the difference to be less extreme.

Or maybe that's just German VS American engineering.

WWII plane is just about one calculator and a booster rocket short of being the space shuttle.

No. Just no. It cost a mere $800k in present day dollars to produce.

Meanwhile, rocket boosters, even the most economical ones such as Falcon 9 have a marginal cost of $15 million, and it takes $1 million dollar to refurbish them after a flight. Shuttle infamously cost $1 billion per start, an example of waste and inefficiency.

IF you want to compare spaceplanes to planes, SR-71 is about one of the few valid examples.

There are material costs, and then there engineering/design costs.

I think one of Musk's original reasons for going into the space game was that he realized material and engineering costs for rockets should be comparable to airplanes, but rockets were way more expensive. So presumably there was room for a lot of improvement either on the material or engineering side.

Even still, planes were a lot simpler back in the day... even the engineering costs were probably fairly low in comparison to what came later.

What is this place?

This website is a place for people who want to move past shady thinking and test their ideas in a court of people who don't all share the same biases. Our goal is to optimize for light, not heat; this is a group effort, and all commentators are asked to do their part.

The weekly Culture War threads host the most controversial topics and are the most visible aspect of The Motte. However, many other topics are appropriate here. We encourage people to post anything related to science, politics, or philosophy; if in doubt, post!

Check out The Vault for an archive of old quality posts. You are encouraged to crosspost these elsewhere.


Why are you called The Motte?

A motte is a stone keep on a raised earthwork common in early medieval fortifications. More pertinently, it's an element in a rhetorical move called a "Motte-and-Bailey", originally identified by philosopher Nicholas Shackel. It describes the tendency in discourse for people to move from a controversial but high value claim to a defensible but less exciting one upon any resistance to the former. He likens this to the medieval fortification, where a desirable land (the bailey) is abandoned when in danger for the more easily defended motte. In Shackel's words, "The Motte represents the defensible but undesired propositions to which one retreats when hard pressed."

On The Motte, always attempt to remain inside your defensible territory, even if you are not being pressed.


New post guidelines

If you're posting something that isn't related to the culture war, we encourage you to post a thread for it. A submission statement is highly appreciated, but isn't necessary for text posts or links to largely-text posts such as blogs or news articles; if we're unsure of the value of your post, we might remove it until you add a submission statement. A submission statement is required for non-text sources (videos, podcasts, images).

Culture war posts go in the culture war thread; all links must either include a submission statement or significant commentary. Bare links without those will be removed.

If in doubt, please post it!


Rules


Recommended Posts And Communities

Recommended Realtime Chats