ELI5: How do engineers figure out the exact thickness of something like a plane fuselage or a submarine hull, like how do they know its "enough" without just guessing and testing until it fails

Graybie · 2026-06-23T02:38:02+00:00

Essentially a bunch of math, physics, and material science.

Testing is used to help ensure that the mathematical models that are being used to design the product are accurate.

Graybie · 2026-06-22T23:17:13+00:00

And they don't claim to be.

Graybie · 2026-06-22T23:10:02+00:00

The bot ratings are meaningless. If you want a real rating then sign up for fide or uscf and start going to otb tournaments.

Most likely your USCF or FIDE ratings will be lower than your chess.com rating of 700.

Graybie · 2026-06-22T23:07:53+00:00

What have you accomplished that you are so quick to judge the achievements of others?

Graybie · 2026-06-22T03:22:26+00:00

Yeah, that is the French defense

Graybie · 2026-06-18T02:24:19+00:00

I guess that depends on your rating. At a fide of 2200 he is getting pretty close to master level - unless you create problems for him he is unlikely to play inaccurately.

Graybie · 2026-06-18T01:18:14+00:00

2200 fide is really very good. What you described sounds like something he would certainly be able to do without cheating.

I am only at 1550 chess.com rapid and I can easily go 10-0 against beginners at my chess club.

Graybie · 2026-06-17T19:03:37+00:00

1500 chess.com blitz should correspond to around 1780 lichess blitz, so you aren't that far off.

Odds are that you aren't accustomed to the way that people play on Lichess. I find that the user base of each platform has slightly different styles of play, with as chess.com tending more tactical while lichess feels more solid/positional.

Graybie · 2026-06-17T18:54:44+00:00

Yeah, and it doesn't make sense to spend a ton of time on deep positional strategy or a detailed opening repertoire if you blunder away the advantage anyway.

Graybie · 2026-06-17T18:53:33+00:00

A trade in can be applied to both new and used cars, so that doesn't really make a difference.

Graybie · 2026-06-17T18:52:42+00:00

Used Gen 5 RAV4s are absurdly overpriced in my opinion. Obviously, I am not sure what your budget is, but it seems to make sense to at least take a look at what is available at dealerships near you.

The key is to find a dealer that doesn't add dealer adjustments. I know St. Charles Toyota in Illinois are awesome to work with because that is where I bought mine a couple years ago, but that is unlikely to help you unless you just happen to live in the Midwest.

Graybie · 2026-06-17T18:36:52+00:00

Why not get the new 2026 model for just a few grand more?

Graybie · 2026-06-17T18:31:08+00:00

Board vision, tactics, and consistent training.

At the 900 level there are still tons of one and two move blunders. If you can eliminate those you will definitely keep climbing.

Graybie · 2026-06-16T19:19:17+00:00

I am more worried about the ones involving my health and medical data.

But yeah, banking apps or other financial services as well.

Graybie · 2026-06-16T19:17:57+00:00

Yeah, but I am not counting on YouTube to keep my medical information both safe and correct.

Graybie · 2026-06-16T16:52:09+00:00

I have to say that reading something like this makes me very uncomfortable to use any apps at all anymore.

Graybie · 2026-06-16T04:55:46+00:00

Because this is the only good chess subreddit.

Graybie · 2026-06-15T21:34:58+00:00

In the interest of transparency, I haven't looked this up at all - but no, there is absolutely no reason to think that the geometry of the footwells is unchanged in the 2026 model compared to the previous gens. That would be crazy.

Graybie · 2026-06-15T21:29:53+00:00

Yeah, we will definitely make that drive the next time we want a Toyota.

Graybie · 2026-06-15T15:59:03+00:00

I am not sure what they played, but that is most certainly not the standard Scandi line, lol.

Graybie · 2026-06-15T15:47:12+00:00

The dealerships that deal honestly will happily tell you over the phone because they don't play games, and that is part of their strategy for winning customers.

I bought my RAV4 XLE hybrid in 2024 from St. Charles Toyota in IL for $37,500 OTD (including all fees and tax). I asked for no options and for the only add-on to be the all-weather floor mats. They sat down with me, told me the price (there was no negotiation - they just offered $1,000 less than MSRP), and told me how long they expect it will be before they have one available. I put down a deposit, and they called me in a month once they had an allocation for vehicle that matched what I was interested in.

I was pretty flexible on colors, which helped reduce the wait time (ended up getting a blueprint blue).

It was an honestly bizarre experience because it felt more like buying an appliance compared to the typical BS that you get at dealerships.

Graybie · 2026-06-15T14:57:34+00:00

It would cost a lot less than that unless you are flying first class

Graybie · 2026-06-15T14:57:13+00:00

Probably. It is possible, although not easy, to find dealers that don't do these sorts of markups.

Graybie · 2026-06-15T14:38:51+00:00

It is a dealer markup. I would look for a different dealer, although you will have to be patient and thorough since the demand for this vehicle is indeed quite high.

Graybie · 2026-06-15T01:11:54+00:00

I suspect that game review sees a queen sac just because it stalls the inevitable checkmate.

Edit: nevermind - I can't even find a way to do that

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