Bill;
I'll have to admit that the round- tube chassis that I built was before the
invention of "Joint Jiggers"-- it was a hacksaw and a round Nicholsen file
job-- strictly a manual operation. The thing was built out of 1"OD 0.062"
and 3/4" OD x 0.049" round mild steel tubing and the tube intersections were
a nightmare to cut and to (torch) weld. Halfway through the project, I
discovered braze welding (nickel-silver-bronze fillet brazing)and that
solved the welding problems.
The guys who fabricated the Tipo 63 (?) "Birdcage" Maserati chassis must
have been commited to a lunatic asylum after a few weeks of that work.
I'd still recommend square tubing for a chassis. At least if a round tube
roll bar is welded to a square tube chassis, the intersection is still a
straight cut.
Regards, Neil Tucson, AZ
-----Original Message-----
From: ardunbill@webtv.net [mailto:ardunbill@webtv.net]
Sent: Friday, December 07, 2001 2:56 PM
To: Albaugh, Neil; land-speed@autox.team.net
Subject: RE: lakester frame
I cut all the regulation 1-5/8" x .125" round steel tubing for my
roadster roll cage with one of Speedway's joint jiggers which uses a
1-3/4" hole saw in a 1/2" drill press. I followed the model in the SCTA
Rules and Records Book. ONE hole saw did the WHOLE job, but Neil you
are right, it ain't easy. This is a long job. The square tubing would
undoubtedly be way easier for the frame, but the roll cage proper must
be made of round tubing, I believe. Bill
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