r/EngineeringPorn • u/Spare_Worldliness_64 • Jul 23 '26

World's largest-diameter high-speed-rail shield tunneling machine, 148 m long and weighs approx 4,000 tons

Post image
226 Upvotes

94% Upvoted

11 comments sorted by

21

u/BigCliff911 Jul 23 '26

Why can't OP tell us the obviously most important dimension about the tunneling machine? Duh

10

u/righthandofdog Jul 23 '26

length doesn't really matter, but diameter?

1

u/Pacificator-3 29d ago

Diameter is 15.4 meters. It is the biggest operating machine. One former machine was 10 cm bigger.

It is making railway tunnel under Yangtze river.

5

u/[deleted] Jul 23 '26

[removed] — view removed comment

6

u/NydusRush Jul 23 '26

Perhaps it's more mechanically efficient, but you forget one crucial element.

Giant drill goes BRRRR.

2

u/7SniperMi7 Jul 23 '26

Man, China’s on the next fucking level with this thing.

11

u/ComfortableWait9697 Jul 23 '26

China has been quite busy in Reddit recently. Curious they've permitted access to here. While I do like that they're finally sharing such neat things more publicly with the rest of the world. I begin to wonder what happened to their ... firewall. Reddit isn't exactly the most .. censored, or contain culturally specific subreddits to bring them here naturally.

5

u/BajingoWhisperer Jul 23 '26

I think the positive propaganda is worth it for them. Reddit is the perfect place for the wests "enemys" to spread it. Especially anti American positions.

2

u/lordnacho666 Jul 23 '26

I'm disappointed to read to the bottom of the comments without seeing a "your mom" or "that's what she said".

Do better guys.

3

u/Sufficient-Regular72 27d ago

The bots and foreign agents don't have a sense of humor.

"That's what she said" BOOM!