Ad: This forum contains affiliate links to products on Amazon and eBay. More information in Terms and rules
Those numbers (in red) are the material 24ST Alclad aluminum .051 thickanother photo:
The numbers on the structure seem to be part numbers but don't match the A/B-26 from what I've seen. Douglas did manufacture B-17s so there might be a clue. Sometimes manufacturers created in-house "synthetic" part numbers for their own internal systems, so this may be the reason for those numbers.Thank's for your replies!
Austria was "visited" by the Fifteenth Airforce located on 3 Airfields in Italy . They only had B-17 and B-24 in use to my knownledge. Don't think a B-26 could take such long distances.
As on many other US aircraftI did confirm that metal was also used in the B-17s
I don't think they are serial numbers but rather part numbers assigned to the specific sub assembly. Although I'm pretty sure the stamp is from Douglas, these number are throwing off the search a bit. Again, sometimes subcontracted manufactures may assign their own part numbers to assemblies.But what about the big black Numbers L5 7513 22 and 766 22 3 on the sheet??
Serial numbers of the Manufacturer or useless for identification ??
But what about the big black Numbers L5 7513 22 and 766 22 3 on the sheet??
Serial numbers of the Manufacturer or useless for identification ??
I've seen "LS" #### used as a material code (Lockheed) but can't find any other material codes matching these number. Unless we're looking at a major sub-assembly, I don't recall smaller structural sub assemblies being assigned serial numbers. A bit baffling!As memo serves the L5 7513 22 is the aluminium alloy specification. IMHO the 766 22 3 is the same but different alloy.
Yes, but I don't think that structure is steel, it looks all aluminumHumm.. yes the LS is possible as the L5. The 7513 seems to be the alloy serial number.