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View Full Version : Birmabright thickness


bstraw
06-23-2012, 04:28 PM
Anyone know the thickness of the birmabright panels on series rovers in decimal, fraction, or gauge form?
4flattires
06-23-2012, 05:04 PM
18g, as measured on my 64 and 69 wings. Caliper reads .040"
TeriAnn
06-23-2012, 07:48 PM
Depends upon which Series. The SII (not A) panels are thicker than the IIA and it is possible the SIII is a tad thinner yet. I believe they switched to a cheaper aluminum alloy starting with Defenders, and the aftermarket panels seem to be made from light duty aluminum foil.
ignotus
06-24-2012, 01:02 AM
The Birmabright Works closed in 1980. :^(

gene
Alaskan Rover
06-25-2012, 11:18 AM
The Birmabright Works closed in 1980. :^(

gene

that explains so much!! thanks!!

they say that many many manufacturer's made an exact same formula of alloy....but I
tend to disagree. My uncle used to be a managing engineer at AlCOA...and he says that while they did have an aluminum and magnesium (I fpget the alcoa #), it was the ratios between the three metals (aluminum, magnesium and manganese) that varied slightly between manufacturers...even though they weren't supposed to.

I think Birmabright Ltd(or whatever they were called officially) had just hit upon the perfect ratio of those three metals...maybe wth just enough manganese to counter all but very minimal oxidation.