WIX Archives
Re: Stamping of parts
Posted by bdk on Fri Jan 04, 2002 02:36:47 PM
In reply top Re: Karens photos posted by Glenn Wegman on Thu Jan 03, 2002 07:37:38 PM
Normally structural sheet metal and thin plate parts are not impression stamped as this would be a stress riser that could lead to fatigue cracking in service. This is why data plates are used rather than just impression stamping a fuselage longeron with all the data plate information (which would have saved a lot of electrons on the data plate swapping posts!).
Most structural parts would have been ink stamped or had a data tag. There are exceptions like on some castings perhaps, but these parts have different requirements and lower strength values than wrought sheet or plate products.
I realize this was wartime, but standard aircraft practices would have been followed regardless. If you have data to the contrary, I would welcome the information.
Now who has a copy of that parts book so we'll know for sure where that part number came from?
BK
: Hi Karen and Brandon,
:
: The piece of metal appears to be cut from a larger piece w
: hich would most likely be the upper intermediate wing skin
: or the large skin panel on the upper side of the wing fro
: m the front spar to the rear spar and from the wing center
: rib out to the outboard fuel cell bay rib. It would be th
: e same or the oppsoite side of the bigger section you have
: with the hole for the fuel filler cap in it. If you were
: to check the thickness of it,it should measure .100" thick
: . (Providing that my hypothesis is correct!)