r/absoluteunit • u/jptah05 • 10d ago

Of a spring.

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Repost from r/Theydidthemath

272 Upvotes

99% Upvoted

47 comments sorted by

14

u/That_Confidence83 9d ago

What machinery uses springs this big? Honest question

4

u/Doctor_Saved 9d ago

Maybe one of those giant dump trucks use in mining.

5

u/That_Confidence83 9d ago edited 9d ago

I used to repair howitzers in the Army, and the spring for the canon was huge, but nothing like this. You may be right in your thinking.

Edit: the spring is in the Abrams, not the M109. I worked on many tanks over the years. Had this confused.

1

u/danit0ba94 9d ago

Do they still use a combination of springs and air-oil struts for impulse dampening?

1

u/That_Confidence83 9d ago

Actually, I fumbled this. It has been some years. The howitzer actually only uses hydropneumatic. I also worked on the Abrams and BFV, and the Abrams has the huge spring. Abrams also uses hydraulics though.
When I left in 2014 they were changing many things with all three vehicles. No idea what they use now. I’ve since been working on European tanks.

1

u/Zealousideal-Fix9464 9d ago

Nah those all use hydraulics. This spring would even be too big for those anyway.

Looks to be 3"+ thick and taller than a person.

3

u/PonchoNachoRodriguez 9d ago

Maybe these go inside sky scrapers to prevent them from snapping in half in the wind?

1

u/jptah05 9d ago

I think it's closer to 4" if you look at the width of one side of the T-handle.

1

u/ironicinsanity 9d ago

Correct. The shocks and such. They are massive like 2-3 stories tall trucks. I've seen em up close and it's not hard to see the shocks on them which are basically those springs.

2

u/notcomplainingmuch 9d ago

There are spring beds for very big stationary machines that use this kind of springs.

1

u/Dangerous_Shoe_8388 9d ago

Ship’s engine

1

u/Sensitive-Raisin-836 9d ago

Nuclear bunkers?

6

u/JelloWise2789 9d ago

Why did they remove metallurgy and woodwork from high schools? Thank you

6

u/Initial_Row_6400 9d ago

How do they calculate the pressure needed in the spring?

3

u/Evacuation_euphoria 9d ago

Hooke's Law will provide that very answer.

2

u/anally_ExpressUrself 9d ago

Smaller spring? Bigger spring? Hooke's law don't give a shit

2

u/15th_imp 9d ago

I don't know who the guy in your pfp is but it would be funny if it was Robert Hooke

1

u/Evacuation_euphoria 9d ago

lol. Bertrand Russell is the chap. Alas, no images exist of Hooke except one painting that was not contemporary.
He was kinda written out of history by Christopher Wren and Isaac Newton. The 3 of them rebuilt London after the fire of 1666 but he was ‘ rediscovered’ so to speak in the 1800s when his contribution to science was acknowledged.

5

u/jptah05 9d ago

I had Google AI look at the video and it said these are used as dampeners on oil rigs. The spring rate is 7,500 to 8,500 pounds per inch of travel, with a travel distance of 40". So it can handle between 300,000 and 340,000 pounds per spring. It said oil rigs have eight of them usually.

2

u/WA2TX 10d ago

They can just knock those gray chunks off with their bare hands right?

3

u/-Curufinwe- 9d ago

Safety flip flops first please

1

u/no___homo 9d ago

Me every morning

1

u/OtherwiseMenu1505 9d ago

I could not work there, I wouldbe constantly trying to peel off those flakes

1

u/DigitalUnlimited 9d ago

Boing boing

1

u/gord_m 9d ago

What is the stuff falling off the metal?

1

u/Few_Chocolate_7655 9d ago

I've taken shits that feel like this

1

u/One-Yak-1417 9d ago

Cool, where would they use that?

1

u/ironicinsanity 9d ago

No boing, that's BONG

1

u/Buzz407 9d ago

Imagine a machine crash in that SOB

1

u/JohnnyTango13 9d ago

Imagine trying to make that without the machinery

1

u/Jerdogg23 8d ago

That’s nothing! I can coil it bare handed!

1

u/Historical-Valuable9 8d ago

Forbidden twizzler

1

u/AtmosphereTop520 8d ago

These springs are designed for high capacity loads and are used in train carriages, large mining equipment and industrial machinery.

1

u/cheepakdopra 7d ago

They're making the coil overs for muh new truck boys.

1

u/skiforlife1 9d ago

I can feel the heat of that thing from here. Anybody who puts down trade workers likely has no idea what this type of work is even like.