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I thought I had seen it all...

64Wing
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Nifty! I want one. Actually would be really neat to see a combo where the compass side of the piece is a smart device with a mini magnetometer in it so it can automatically adjust for magnetic declination/deviation and charge via solar.
 
ghce
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64Wing 64Wing
Nifty! I want one. Actually would be really neat to see a combo where the compass side of the piece is a smart device with a mini magnetometer in it so it can automatically adjust for magnetic declination/deviation and charge via solar.

And a barometer to, probably gps would be nice but a step too far lol
 
cvalue13
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I don’t get how any of these rudimentary compasses work from within these metal cases -> is all SS a non-ferro material, or are only special SS non-ferro?
 
asrnj77
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cvalue13 cvalue13
I don’t get how any of these rudimentary compasses work from within these metal cases -> is all SS a non-ferro material, or are only special SS non-ferro?

The Porsche/IWC is titanium. I don’t know about the others
 
MRC
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cvalue13 cvalue13
I don’t get how any of these rudimentary compasses work from within these metal cases -> is all SS a non-ferro material, or are only special SS non-ferro?
It depends on the grain structure which itself depends on the way the SS was cooled when first solidified and/or later heat treated. As with most things it's actually more complicated than that but it's 50 years since I opened a metallurgy textbook.


Try this if you want the details https://www.carpentertechnology.com/blog/magnetic-properties-of-stainless-steels
 
64Wing
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ghce ghce
And a barometer to, probably gps would be nice but a step too far lol
Don't need a barometer or gps if I'm not flying. Realistically, this would be a field watch. Local altimeter settings provide a sufficient datum for weather trend formulations. Gps is cheating lol
 
Mooieklokjes
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cvalue13 cvalue13
I don’t get how any of these rudimentary compasses work from within these metal cases -> is all SS a non-ferro material, or are only special SS non-ferro?

Good point, I don’t know either. But from what I can remember from Chemistry and Physics class is similar to the point @MRC makes. Will try to look for some more information as well.
 
loniscup
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Lovely piece, thanks for showing us!!

And as @JwRosenthal guessed 😗 went straight to search for one and this more modern (?) Ductor is on ebay atm in case someone is interested.
I like OP's a lot more though!!

s-l1600.jpg s-l1600 (1).jpg s-l1600 (3).jpg s-l1600 (4).jpg
 
Walrus
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Let’s not forget the not so vintage alpanist with the compass I’m part of the cool club
image.jpg
 
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