Author Topic: what I have learned today. (Read 864260 times)

Basil · « **Reply #5725 on:** 14 December, 2021, 10:42:01 am »

That the Miss World contest is still a thing.

fimm · « **Reply #5726 on:** 14 December, 2021, 01:46:09 pm »

That Christian Horner (Red Bull F1 boss) is married to Geri Halliwell (Spice Girl).

chrisbainbridge · « **Reply #5727 on:** 15 December, 2021, 07:21:49 am »

That rear derailleurs now do not need hangers and are direct mount (except SRAM)

T42 · « **Reply #5728 on:** 15 December, 2021, 07:48:49 am »

So that you can break the frame or the derailleur instead of a part costing a measly 5€?

chrisbainbridge · « **Reply #5729 on:** 15 December, 2021, 08:29:04 am »

I understand that the redesign was done so that it is easier to fit thru-axles and also to put the derailleur in a safer place

grams · « **Reply #5730 on:** 15 December, 2021, 10:38:51 am »

“Direct Mount” is a marketing term for bikes with hangers that put the derailleur pivot in the place modern Shimano RDs want it, instead of needing essentially an adapter that moves the pivot point backwards.

It’s up to the frame manufacturers whether the hanger is replaceable or not.

Cudzoziemiec · « **Reply #5731 on:** 15 December, 2021, 11:57:23 am »

I've never quite seen why steel frames don't generally have separate hangers. Yes, you can bend the hanger back into line, but how many times and how accurately? It seems very common quite common that they are bent out of line.

LittleWheelsandBig · « **Reply #5732 on:** 15 December, 2021, 12:03:31 pm »

Steel is 3x stiffer than aluminium, meaning a more accurate shift. The type of steel used for dropouts is quite malleable and very resistant to fatigue. A hanger alignment tool is more accurate than a bolted-on hanger, given construction tolerances. A replaceable Al dropout would be a big step backwards.

Cudzoziemiec · « **Reply #5733 on:** 15 December, 2021, 12:14:10 pm »

I was thinking of a bolted-on steel hanger – but your point about construction tolerances deals with that.

Cudzoziemiec · « **Reply #5734 on:** 15 December, 2021, 01:51:27 pm »

That some trams have electromagnetic brakes. Not just retarders, actual brakes.

Ashaman42 · « **Reply #5735 on:** 15 December, 2021, 04:20:32 pm »

That doing something wrong such that the 130mm long ball end cutter on the CNC mill drives itself down through your workpiece and spoilboard and then tries to move sideways results in:

a very big bang
a now 90mm long ball end cutter
lots of sparks
a somewhat chewed up collet holder

Sigh. I was doing well this week.

robgul · « **Reply #5736 on:** 15 December, 2021, 07:29:27 pm »

Sir Ian Vallance of Covid fame is an old boy from my grammar school (somewhat after my presence there)

Wowbagger · « **Reply #5737 on:** 16 December, 2021, 07:18:52 pm »

Yesterday, hacksherly.

The etynology of the word "thagomiser".

https://en.wikipedia.org/wiki/Thagomizer

Mr Larrington · « **Reply #5738 on:** 16 December, 2021, 08:34:05 pm »

We at P@nd3m1c Pr0duckt10nz^TM® covered that during this year’s Tour de France, in accordance with our charter to ~~infuriate~~ educate and ~~disinform~~ rehabilitate.

Efrogwr · « **Reply #5739 on:** 16 December, 2021, 08:51:01 pm »

That (allegedly) there is a medico-scientific discipline called flatology... the study of farts.

rafletcher · « **Reply #5740 on:** 16 December, 2021, 09:25:41 pm »

Quote from: Ashaman42 on 15 December, 2021, 04:20:32 pm

That doing something wrong such that the 130mm long ball end cutter on the CNC mill drives itself down through your workpiece and spoilboard and then tries to move sideways results in:

a very big bang
a now 90mm long ball end cutter
lots of sparks
a somewhat chewed up collet holder

Sigh. I was doing well this week.

Aah. Memories of too deep a cut and too fast a feed speed and the resulting bent arbour on the horizontal mill.

Ashaman42 · « **Reply #5741 on:** 16 December, 2021, 10:47:52 pm »

I reran the process. After rezeroing the axes (again). And had the speed slider set to 5% of the programmed speed. And spend the entire 25 minute process with my hand held against the eStop. And twitched at every noise.

And it ran almost absolutely as planned

And, whilst I haven't checked it's exactly dimensionally accurate still (if it was to begin with) it seems pretty good.

So whilst I'm not certain what went wrong at least I have a little confidence back.

My coworker very helpfully told me "Well you need to work out what went wrong so it doesn't happen again". Well yes, yes I do. But I've had one ten minute tutorial on this machine and everything else has been Google and Youtube so how exactly do you expect me to divine the solution?!

I kind of don't want to learn too much of this because it's something he "can't be bothered to look after" and hterefore want's to slope off onto me but it's something I want to learn for my own skillset.

Anyway. I'm off now till Monday and I will pick up again then.

bhoot · « **Reply #5742 on:** 17 December, 2021, 10:27:40 pm »

That it's possible* to have a sustainable superyacht

This one is in West India Dock at Canary Wharf and it's an ugly beast...

* No I am not convinced either

peter simplex · « **Reply #5743 on:** 17 December, 2021, 10:52:41 pm »

Quote from: bhoot on 17 December, 2021, 10:27:40 pm

That it's possible* to have a sustainable superyacht

This one is in West India Dock at Canary Wharf and it's an ugly beast...

* No I am not convinced either

I see no contradiction - the International Superyacht Summit has only recently finished in the United Arab Emirates, the location also chosen last month by the dictator of our green, inclusive and sustainable future, Klaus Schwab of the WEF, to go schmoozing with the leaders of that authoritarian state for purposes of promoting his coming book 'The Great Narrative'.

You can jet into Davos next month to witness the big reveal yourselves. Sustainably, of course, like you did going to COP26.
https://www.weforum.org/events/the-great-narrative-2021/sessions/a-call-for-the-great-narrative

Mrs Pingu · « **Reply #5744 on:** 17 December, 2021, 10:54:59 pm »

Ugly bastarding things

rafletcher · « **Reply #5745 on:** 19 December, 2021, 01:15:54 pm »

Along with many others I’m sure, that there is a flatfish called a Topknot. And less widely, what Texas toast is.

Cudzoziemiec · « **Reply #5746 on:** 19 December, 2021, 07:23:16 pm »

If you travel by train, or if you ride on a route parallel to a railway, such as the Flax Bourton Greenway, you'll notice that every so often there's a stretch of oil-soaked track. What is this? Leaky trains? No, it's a flange greaser! A device that automatically greases the flanges of train wheels as they pass. What's more, some of them are solar powered.

Kim · « **Reply #5747 on:** 20 December, 2021, 05:57:51 pm »

https://www.youtube.com/watch?v=qseRtY5eX94

Quote from: rafletcher on 09 December, 2021, 11:58:05 am

Quote from: Cudzoziemiec on 09 December, 2021, 11:54:33 am
Can someone explain to me the physics of that? Is it just that the jet of compressed air is reducing friction between grips and bars so making it easier to push them along?

Yep, air is a fluid, so force it between the grip and the bar and the grip will slide more easily. It may also serve to expand the grip somewhat, reducing contact area.

I can think of more fun things to do with compressed air in a workshop.

Following on from this, I remembered to try it last time I had the compressor switched on. The effect is quite dramatic on the 50cm long foam grips on my butterfly bars - the whole grip inflates and stretches slightly, riding on a cushion of air. I was able to rotate the grip around the bar to present the less-worn surface from the underside (didn't try sliding it off, as there are shifters in the way, but I expect that would work too).

It's a bit faffier to manipulate than a liquid lubricant (you need one hand free for the air nozzle), but the grip is ready for use instantly. I suppose it's also an environmental win, as you're only consuming electrons, rather than some organic chemistry that needs shipping around in containers.

Mr Larrington · « **Reply #5748 on:** 20 December, 2021, 06:38:59 pm »

That the Galápagos pengs at the northern end of Isabela island live in the Northern Hemisphere.

Cudzoziemiec · « **Reply #5749 on:** 22 December, 2021, 10:23:13 am »

Quote from: Basil on 14 December, 2021, 10:42:01 am

That the Miss World contest is still a thing.

And that the United Nations has its own version: UN MISS.

This post may contain traces of misrepresentation, distortion, misrepresentation and factual inaccuracy.