this post was submitted on 12 Aug 2023
29 points (91.4% liked)

Ask Lemmy

26736 readers
1799 users here now

A Fediverse community for open-ended, thought provoking questions

Please don't post about US Politics. If you need to do this, try !politicaldiscussion@lemmy.world


Rules: (interactive)


1) Be nice and; have funDoxxing, trolling, sealioning, racism, and toxicity are not welcomed in AskLemmy. Remember what your mother said: if you can't say something nice, don't say anything at all. In addition, the site-wide Lemmy.world terms of service also apply here. Please familiarize yourself with them


2) All posts must end with a '?'This is sort of like Jeopardy. Please phrase all post titles in the form of a proper question ending with ?


3) No spamPlease do not flood the community with nonsense. Actual suspected spammers will be banned on site. No astroturfing.


4) NSFW is okay, within reasonJust remember to tag posts with either a content warning or a [NSFW] tag. Overtly sexual posts are not allowed, please direct them to either !asklemmyafterdark@lemmy.world or !asklemmynsfw@lemmynsfw.com. NSFW comments should be restricted to posts tagged [NSFW].


5) This is not a support community.
It is not a place for 'how do I?', type questions. If you have any questions regarding the site itself or would like to report a community, please direct them to Lemmy.world Support or email info@lemmy.world. For other questions check our partnered communities list, or use the search function.


Reminder: The terms of service apply here too.

Partnered Communities:

Tech Support

No Stupid Questions

You Should Know

Reddit

Jokes

Ask Ouija


Logo design credit goes to: tubbadu


founded 1 year ago
MODERATORS
 

I think that the additional weight on the water on the surface of the outer airplane body increases friction with the air, and also weight of the aircraft. But does the fuel consumption increase? And by how much?

you are viewing a single comment's thread
view the rest of the comments
[–] originalfrozenbanana@lemm.ee 2 points 1 year ago* (last edited 1 year ago) (2 children)

If you consider the fuselage a cylinder and calculate the surface area of the lateral surface it’s 2pir*h. this site has the length as 209.08ft and the diameter as 20.3. That means the fuselage surface area is about 13300ft^2. That same site lists the wing surface area as 4605ft^2, for a total of 17905 square. Assuming an 1/8” of water accumulates uniformly, which is a bad assumption, that’s 2238 cubic feet of water. Each cubic foot weighs about 62 pounds, so that much water weighs 136000 pounds. The normal takeoff weight of a 777 is 534000 pounds, yeah that is a lot. However, only about half the surface area is exposed to rain and 1/8 inch is a lot. Id imagine it’s less than half that weight.

[–] freecandy@lemmy.world 6 points 1 year ago (1 children)

Thats like 2.5 times the weight of fuel when full. Math is bad

[–] originalfrozenbanana@lemm.ee 3 points 1 year ago (1 children)

It’s the upper bound of a plane fully covered with an eighth inch of water. Reading is hard.

[–] freecandy@lemmy.world 6 points 1 year ago (2 children)

Youre probably the same kind of student I was. Shows that you know how to do the work, but don't care enough to actually find the right answer

[–] originalfrozenbanana@lemm.ee 2 points 1 year ago

Hell yes lol nailed it. I feel seen

[–] all-knight-party@kbin.cafe 1 points 1 year ago

I'm even worse at math than either of you, what's bad here?

[–] conciselyverbose@kbin.social 1 points 1 year ago

I appreciate this answer. The other posts showing the math are still cool, but in theory I could do it myself.

You highlighted shit that wouldn't occur to me.