this post was submitted on 03 Nov 2023
596 points (96.7% liked)

NonCredibleDefense

6379 readers
933 users here now

A community for your defence shitposting needs

Rules

1. Be niceDo not make personal attacks against each other, call for violence against anyone, or intentionally antagonize people in the comment sections.

2. Explain incorrect defense articles and takes

If you want to post a non-credible take, it must be from a "credible" source (news article, politician, or military leader) and must have a comment laying out exactly why it's non-credible. Random twitter and YouTube comments belong in the Low Hanging Fruit thread.

3. Content must be relevant

Posts must be about military hardware or international security/defense. This is not the page to fawn over Youtube personalities, simp over political leaders, or discuss other areas of international policy.

4. No racism / hatespeech

No slurs. No advocating for the killing of people or insulting them based on physical, religious, or ideological traits.

5. No politics

We don't care if you're Republican, Democrat, Socialist, Stalinist, Baathist, or some other hot mess. Leave it at the door. This applies to comments as well.

6. No seriousposting

We don't want your uncut war footage, fundraisers, credible news articles, or other such things. The world is already serious enough as it is.

7. No classified material

Classified information is off limits regardless of how "open source" and "easy to find" it is.

8. Source artwork

If you use somebody's art in your post or as your post, the OP must provide a direct link to the art's source in the comment section, or a good reason why this was not possible (such as the artist deleting their account). The source should be a place that the artist themselves uploaded the art. A booru is not a source. A watermark is not a source.

9. No low-effort posts

No egregiously low effort posts. These include Social media screenshots with a title punchline / no punchline, recent (after the start of the Ukraine War) reposts, simple reaction & template memes, and images with the punchline in the title. Put these in weekly Low effort thread instead.

10. Don't get us banned

No brigading or harassing other communities. Do not post memes with a "haha people that I hate died… haha" punchline or violating the sh.itjust.works rules (below). This includes content illegal in Canada.


Join our Matrix chatroom


Other communities you may be interested in


Banner made by u/Fertility18

founded 1 year ago
MODERATORS
 
you are viewing a single comment's thread
view the rest of the comments
[–] [email protected] 36 points 9 months ago* (last edited 9 months ago) (2 children)

So looking at a map.of New Yorks bays and ignoring depth and bridges I'm going to assume this is about 2 miles long or 10,560ft. I have no evidence and just eyeballed it.

Meaning if you can overcome the skin friction it has a hull speed of about 160mph...without planing.

Modern carriers have a hull speed in the neighborhood of 45mph (though officially the top speed is like 35mph) and normally cruise at 25-30mph so the slow pokes can keep up.

[–] mindbleach 6 points 9 months ago (1 children)
[–] [email protected] 7 points 9 months ago (1 children)

Even with that I still don't get it. Is that a theoretical max speed?

[–] [email protected] 21 points 9 months ago (2 children)

So, as I understand it, a boat (ship) operating in displacement mode is going to be the most efficient, up until that speed. Past that most of the additional power you put in is going into just shoving water out of the way that really doesn't want to, rather than fighting friction. Also it's where the entirety of your ship is trying to climb its own bow wave, so you're trying to push the whole boat up hill.

If you want to go faster than hull speed you need to have a different hull design like a semi-displacement or planing hull. These are a lot less fuel efficient than displacement hulls as well as some other dosadvantages with weight and bad weather, but if you want to go fast they are your only option.

TL;DR: it's sort-of a max speed. It's probably better to describe it as, the speed at which you need to go back to the drawing board for that vehicle.

[–] [email protected] 7 points 9 months ago (3 children)

But what if we just add more engines? And, lest you think it a simplistic idea: what if they were even bigger engines?

[–] [email protected] 10 points 9 months ago (1 children)

And what if we painted it red? Red make go fasta

[–] mindbleach 10 points 9 months ago

It can go faster, but you wouldn't want to be on it.

Or near it.

[–] [email protected] 4 points 9 months ago

Im pretty sure relevatistic laws eventually come into play.

[–] mindbleach 5 points 9 months ago

So it's the fastest you can go before calm seas become a roller coaster.