clare wrote:
On Sat, 24 Jun 2006 22:51:05 +1000, "......... :-\)\)"
wrote:

Hi,

Can anyone tell me what alloy is used for the manufacture of aluminium nose
bowls on aircraft such as the Luscombe or C-140 or J-3 Cub ?

Also how are they made (hand beaten, drop hammer etc ??)

I assume they are formed in the 'O' condition ? If so are the heat treated
subsequent to forming or is the strain hardening as a result of the forming
process enough to harden and strengthen the metal ?


Most would have been made out of 24ST, which in today's alloy
desigination would be 2024. Forming would have been done by any of, or
combination of: hand form, stretcher press, drop hammer, or bladder
press. There would be some anealing and heat treatment depending on the
exact alloy used and the forming technique(s).

Craig C.