Quote:
Dundee1000 wrote:
I had to chuckle Dodgeman,
you bikes were made of tube from, Hawker DeHaviland..my Grandads Dinghy was a Hawker DeHaviland,
As mentioned before, the main frame tubes were 0.049" thick in regular models but 0.037 in the two pressurised tubes in the Helium.
The first few frames that were made used the tubing from Hawkers for these two frame tubes & it is apparently US sourced. They liked it because it was a higher grade of tubing than the Jap sourced stuff but had a textured surface & since the Helium came in chrome finish only, it was necessary to polish the texture out of the surface of the tubes before welding it into the frame so that the chrome finish would come out right.
The remainder of the frame components were made under contract with Japanese tubing & it arrived at the factory for welding into a frame as packaged kits.
The Japanese tubing was not as high a spec apparently, nor did it need to be, but the surface was much better finished & did not require polishing prior to electroplating.
Hawker DeHaviland Australia at Bankstown are a clever lot. They made aircraft from rag & tube, Stressed monocoque in alloy & even a quantity of Mosquitos from plywood, so I guess that a small but sturdy & long lasting boat should not pose too many problems for them.