what is it ?

[jim in paris]

hi all
I have found this piece of metal in the street
i wonder what it is :
diametre 28mm
height 40mm
weight 410 grams !
flat surface
no mark of screw
made of steel with a logo on top, a number and the letters FD

have you got any idea what it could be ?
there was some heavy road works in this street so maybe a piece of machinery?


jim

[trompillo]

Has it something written in the logo? The engraved numbers seem to be old,It has woken my curiosity up.

[Dick Stohr]

11 inch dia and 15 inch high, made of metal, but only weighs 1 pound just sounds too light?????????????

[ta0]

11 inch dia and 15 inch high, made of metal, but only weighs 1 pound just sounds too light?????????????

He wrote mm not cm.

Actually that is very heavy. Are you sure of that weight?
I get a density of 17 gr/cm3 Like a tungsten alloy! Hopefully it is not uranium!
If your measurements are right it is an expensive piece of metal!

[Jack]

some kind of calibration block is my best guess
ill keep looking. can you take a close up of the logo in the centre? seeing the words would be helpful

[Jack]

maybe an ASTM block? looks a bit too beat up for that kind of thing though


http://ndtsupply.com/ultrasonic-flaw-de ... locks.html

[Jack]

judging by the propeller in the logo id say something to do with aeronautics

[trompillo]

I never saw a thing like that,

[Dick Stohr]

Ooops! OK 1.1 in dia x 1.5 in hi at just under 1 pound yes, that is pretty heavy! Still I have no idea. F.D = Fire Dept?????????

[jim in paris]

hi all

here is a better view

the letters are still barely visible

after using a thin paper and pencil i obtained a print
at the top it reads AERO with a mirror view
on the left it starts with HY mirror from the bottom
on the right i don't know

about the weight on another scale it reads 408 grams

conclusion : it could be a piece of aircraft

if someone knows how to research a photo from a model
please do it

thanx

jim

[ta0]

These are the heaviest metals:



MetalDensity (gr/cm3)


Iridium22.650


Osmium22.610


Platinum21.400


Plutonium19.816


Tungsten19.600


Gold19.320


Uranium18.900


Mercury13.593



Generally they will not be pure and will be alloyed and somewhat lighter.
Yours has a density of 16.7 gr/cm3. We can discard gold by the color.
Very intriguing!

[Jack]

These are the heaviest metals:



MetalDensity (gr/cm3)


Iridium22.650


Osmium22.610


Platinum21.400


Plutonium19.816


Tungsten19.600


Gold19.320


Uranium18.900


Mercury13.593



Generally they will not be pure and will be alloyed and somewhat lighter.
Yours has a density of 16.7 gr/cm3. We can discard gold by the color.
Very intriguing!

ive seen antique plumbobs that have a center chamber filled with murcury. is that a possibility here with this thing you think?

[jim in paris]

hello jorge

i could send you the piece ..., but i'm off to ajaccio tomorrow

i'll take the intriguing thing on board : maybe it will trigger the security system :--)
wheel c :


jim

[ta0]

hello jorge

i could send you the piece ..., but i'm off to ajaccio tomorrow

i'll take the intriguing thing on board : maybe it will trigger the security system :--)
wheel c :


jim

WARNING!
Something that dense WILL show on the X-ray systems like uranium! In fact, it could be depleted (hopefully) uranium (in which case it can also trigger the radiation detectors), although I would expect it to be darker!
Do NOT take it through security!!!
If it is not radioactive I would love to have it. But it can pretty valuable so you should keep it.

[ta0]

Well, I don't want to scare you too much It is most likely a tungsten alloy. Not dangerous and not very expensive as the rest, but still a very unusual find.