Member postings for Michael Gilligan

Whilst I am perfectly happy to accept Sam’s practical success … I think this needs saying:

There is a big clue in the name of the material : The ‘O’ stands for Oil

Sadly, I note that even this page appears to use ‘0’ in several places **LINK**

https://sheffieldgaugeplate.co.uk/blog/aisi-01-ground-flat-stock/

MichaelG.

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There is no need for ‘respect’ Paul … I wasn’t attempting to address your question.

I was simply pointing-out [as Dave had not done so] where the data could be found.

MichaelG.

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Edit: __ I do try to make it clear to whom I am responding, and in that instance it was not you

… I quoted Dave’s post, not yours.

Edited By Michael Gilligan on 27/09/2021 23:44:43

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Credit where credit’s due … Here’s a link to the NASA page : **LINK**

https://climate.nasa.gov/vital-signs/global-temperature/

… and a quick reminder of Lowess smoothing : **LINK**

https://www.statisticshowto.com/lowess-smoothing/

MichaelG.

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P.S. __ if you want to play with different fits, the data table can be downloaded using the link below the Xaxis

... It's just a nice size to work with the little Russian Industar 50mm f3.5 lens, so it was temporarily affixed with three blobs of BluTack [!]

Closest focus of the Industar is nominally 0.65m, and this reduces it to about 0.45m

These two shots are thoroughly boring, but nicely demonstrate the performance:

With aperture = f16

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With aperture = f3.5

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Not bad for a 120 year old

MichaelG.

Edited By Michael Gilligan on 27/09/2021 20:52:12

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Time passes ...

First here are a couple of shots of the close-up lens:

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MichaelG.

Edited By Michael Gilligan on 27/09/2021 20:50:40

I'm impressed, Brian ... "here are some data"

At last someone who knows that the word is plural

MichaelG.

Did the brief paper that I linked miss the point completely ?

… Just trying to learn a little from your adventure.

MichaelG.

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I’m back

That new picture makes much more sense than the one that I was commenting upon earlier

… You actually have something appropriate against which to adjust the collar

… Go for it !!

MichaelG.

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Fine … it was only a guess, based on the available evidence

It all looks wrong to me; but sorry I cannot be of any assistance.

MichaelG.

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It looks like there is a thrust bearing assembly missing !

You mention a painted surface … could that possibly have been a ‘touch-up’ paint job ?

MichaelG.

With all the bad News that’s about … this is [on several levels] a wonderful story:

**LINK**

https://metro.co.uk/2021/09/26/dog-who-was-almost-put-down-is-now-autistic-teens-best-friend-15318945/

Happy Monday

MichaelG.

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Edit: __ oops, I used those fancy quote marks  in the thread title again.

Edited By Michael Gilligan on 27/09/2021 10:14:47

With apologies for quoting myself

It is worth noting how small an angle 'one second of arc' really is.

As a sanity-check; make a little target with a 1mm wide line on it [when I did this, I just filled-in alternate spaces on a section fom an IKEA paper tape-measure] ... Then view that target at a distance of 206.265 Meters. ... At that distance, 1 second of arc is subtended by 1mm.

MichaelG.

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Ref. __ https://www.model-engineer.co.uk/forums/postings.asp?th=115977

Edited By Michael Gilligan on 27/09/2021 09:08:37

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As a ‘bystander’ I find that intriguing, David … especially in light of the manuscript change on the drawing that Fernando posted.

I wonder what the tolerances are

…. Many lesser firms would probably struggle to keep within thirty seconds of arc !

MichaelG.

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Rendar also did a 13A style (but fused 5A) mains plug, with clips inside

insta-power test adapter

MichaelG.

Joe,

It’s way out of my league … but I just remembered downloading this a while back: **LINK**

https://www.researchgate.net/publication/257337791_A_CNC_program_module_based_on_polar_coordinate_system

… It may be of more use to you than it has been to me

MichaelG.

That looks tidy, Clive

MichaelG.

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As stated earlier, Tony …

There’s a surprisingly succinct review of advantages/disadvantages here: **LINK**

https://www.araner.com/blog/combined-cycle-gas-turbines

MichaelG.

‘professional’ is one of the most abused and ambiguated words in the English language

… best summarised [in my opinion] as ‘does it for money’

MichaelG.

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Thanks to both of you

Given the origins of many ‘engineering’ developments:

I was mildly amused by the Author’s connection with the ‘Museum of Peaceful Arts’

MichaelG.