View Full Version : Recording device, stainless steel?

The Artful Bodger
12-03-2014, 01:42 AM
I have a long roll of data recording foil from some aircraft recording device.

The foil is heavy enough in the roll to be steel and it certainly looks like stainless. The foil is about 5" wide and 0.03mm (I guess that is 1.2 thou), there are sprocket holes down each side. The roll is not magnetic. The roll is many metres/yards long.

Ink stamps on the roll indicates that it has been used and was recorded on both sides.

But I cant find any visible signs of how data was recorded, nothing like a stylus scratch or punched holes.

So what technique might have been used to record on this foil?

12-03-2014, 02:57 AM
It should be magnetic, very very weak but still enough to hold data. Hard drive platters are aluminium with a coating for magnetic data.

12-03-2014, 03:38 AM
Pretty sure they were meant to be scribed. The idea was that even if they went through a fire, the physical impressions would remain and could be read. Whether it's some type of stainless- I think it's Inconel.

The Artful Bodger
12-03-2014, 03:41 AM
Hundred yard long Inconel shims, are they good?

Yow Ling
12-03-2014, 03:49 AM
http://i975.photobucket.com/albums/ae234/YowLingRacing/foil.jpg (http://s975.photobucket.com/user/YowLingRacing/media/foil.jpg.html)

12-03-2014, 05:01 AM
How a flight data recorder works. (http://www.youtube.com/watch?v=xlY5W7be5jU#t=112)

Frank K
12-03-2014, 11:43 AM
In the early 1950's the UNIVAC computer used a metal data recording tape. It was nickel plated phosphor bronze. I still have a reel of it in the back of a closet. Though only about .5 inch wide it looks just like your photo. Every once in a while I cut off a piece and use it for shim stock.

A.K. Boomer
12-03-2014, 11:46 AM
I have no idea but Yow's signature post just made me blow coffee out of my nose,,, damn what a mess lol

loose nut
12-03-2014, 08:11 PM
Would it work in a similar manner to the old wire recorders.