These pictures make my teeth itch

[droopsnoot]

Doobs too said:

Steel is equally strong in tension and compression, but the compressive strength of a structure, regardless of the material from which it is made, is its propensity to buckle. In this example the two pertinent variables are the length of the member in compression and the load it reacts.

Let's assume the failure mode of the structure will be the buckling of the compressed member, so the welds and the mounting are infinitely strong. If we assign each short side of the triangle a length of 1 this gives a hypotenuse of length of 2^-2 (sorry, no square root sign). If the hanging basket has a mass of 'g' then the compressed member reacts a load of 2^-2g when the frame is the 'correct' way up, but only g when it is the 'wrong' way up. This, coupled with the fact the compressed member is shorter when the frame is upside down, I think the upside down version is stronger.

I wish I could have thought of another term for compressed member.

Thanks for the detailed explanation, I kind of see where you're coming from. I have some other thoughts that I won't add, because (a) it's derailing a bit, and (b) they may be utter rubbish.

[Doobs too]

droopsnoot said:

Thanks for the detailed explanation, I kind of see where you're coming from. I have some other thoughts that I won't add, because (a) it's derailing a bit, and (b) they may be utter rubbish.

You're welcome to PM me. I understand not wanting to derail the conversation but don't ever worry about being wrong. Mankind would still be in the stone ages if we hadn't risked being wrong occasionally.

[madbadger]

Just spotted this in our disused control room.

[morgs_]

madbadger said:

Just spotted this in our disused control room.

I'm guessing the missing switch in the bottom left corner? The blurry photo is making my teeth itch more though

[illmonkey]

morgs_ said:

madbadger said:

Just spotted this in our disused control room.

I'm guessing the missing switch in the bottom left corner? The blurry photo is making my teeth itch more though

Only 1 random switch is on, is what I saw.

[madbadger]

illmonkey said:

Only 1 random switch is on, is what I saw.

Switch 127 is on.

Apologies for the blurry photo. The lighting isn't very good in there.

[omgus]

Taken from here and i know that a few of you will hate them.

Although i must admit how anyone can do that to a kit-kat is beyond me.

[illmonkey]

madbadger said:

illmonkey said:

Only 1 random switch is on, is what I saw.

Switch 127 is on.

Apologies for the blurry photo. The lighting isn't very good in there.

But what does it do!? Is this some place like the 'Lost' island?

[Morningside]

illmonkey said:

madbadger said:

illmonkey said:

Only 1 random switch is on, is what I saw.

Switch 127 is on.

Apologies for the blurry photo. The lighting isn't very good in there.

But what does it do!? Is this some place like the 'Lost' island?

Yes, please tell. I love technical stuff like this. Love the controller underneath. Do TI still do stuff like this?

[With these feet]

Morningside said:

monthefish said:

Marty63 said:

M400 NBL said:

Probably not the bike for someone with OCD.

Thats just wrong.

I have always hated that.

Appropriately called a 'lefty' - I'm not a fan of them either.

What the the advantage of it? Just seems to be over-engineered technology for the sake of it.

It is lighter and as stiff as its counterparts if not more so, basically a macpherson strut on a bike.
It does get a bit of getting used to looking down at 1 leg but its as stable as any 2 leg fork Ive owned. Quirky and turns heads!

[madbadger]

Morningside said:

Yes, please tell. I love technical stuff like this. Love the controller underneath. Do TI still do stuff like this?

Nothing anymore. It is part of a disused control room for a pilot BOS plant. All 1980s tech. That switch bank is part of an ingition sequence and would now be controlled as part of a plc program

(BOS is Basic Oxygen Steelmaking where liquid iron is converted to steel via blasting it with oxygen. )

The whole room could probably be run off a laptop now.

[Pooky67]

[Fer]

I guyess this one would fit in here.

[wolfracesonic]

illmonkey said:

madbadger said:

illmonkey said:

Only 1 random switch is on, is what I saw.

Switch 127 is on.

Apologies for the blurry photo. The lighting isn't very good in there.

But what does it do!? Is this some place like the 'Lost' island?

I think you press switch 127 to report if any of the other switches are missing.

[eldar]

madbadger said:

Nothing anymore. It is part of a disused control room for a pilot BOS plant. All 1980s tech. That switch bank is part of an ingition sequence and would now be controlled as part of a plc program

(BOS is Basic Oxygen Steelmaking where liquid iron is converted to steel via blasting it with oxygen. )

The whole room could probably be run off a laptop now.

I work in the nuclear industry, and we have similar and much older stuff. One of our guys has replicated as an experiment (just for fun!) a huge VME based system on a Raspberry Pi and half a dozen I/O boards. He had to add a few flashing lights to convince people it was actually doing anything.

[Jayfish]

[5potTurbo]

Pooky67 said:

That's not one you'd be in a hurry to put right yourself though....

[deadtom]

littleredrooster said:

Although, from a purely engineering viewpoint, a structure such as that is possibly less likely to fail when that diagonal support strut is in tension rather than in compression; ergo, that could be correct, and we could all be wrong!

I like your thinking, however when mounted upside down the horizontal beam is now under compression

[Pooky67]

5potTurbo said:

Pooky67 said:

That's not one you'd be in a hurry to put right yourself though....

Putting your OCD to the test!

[mybrainhurts]

omgus said:

I know him, he's German...

Hermann Von Grossengob.