airfoilmod,
In round figures Al (avoided that one
) has a Specific Resistance about 50% higher than Cu so, if a 50% increase in cross section was used wouldn't that result in about the same temperature?
Melting temps are: Al 660C & Cu 1083C
You'd still achieve a weight reduction because the mass of Cu is 232% that of Al.
I can understand Al being a bit trickier to fit.
Above from my old tables: 1904 Revised 1957
