is 1mm to thin to build the haynes chassis

or should i stick to the 1.6mm

dan

1.6mm sounds verry thick. i think i used 1.2mm.

I can't comment on whether 1mm is too thin from a structural point of view (and I hope you do a detailed FEA analysis rather than taking anyone's word for it on here) - but certainly the usual 1.5/1.6mm is easier to weld effectively.

Depends on the usage.

1mm will be too thin i believe.

1.2mm would be ok for track use

1.5/6mm would be ok for road use.

If you haven't been around for long (neither have I) but i have seen a racing chassis of a westfield fail as it was used on the road and i believe the weight reduction was on the chassis tubes thickness.

I am sure, that someone else will come and correct me.

16 swg was the std spec for both Haynes and Locost books.

SWG to mm

http://www.newcircuits.com/article.php?id=tut003

I'd stick to 16 swg for road use. 18 swg if used for a track car should be inspected regularly (very regularly if you like the curbs etc.) !

i'm using 2 mm but next time 1.6 mm

I'm sure if you're a great welder and can cut the parts perfect you could drop to 1.2 mm. But maybe some extra triangles needed.

But is it worth all the hassle?

Grtz

i'm planning to tig weld my chassis seen as i'm a fab/welder.

my boss who builds his own hot rods,currently i'm building his chassis a 33 roadster reckons 1.6 is better for it.

dan

16g (1.5 or 1.6 mm) is standard, 18g for 'race' chassis (1.2mm), and as said this will have regular inspection. 1mm may well be strong enough in theory, but for a road car don't forget some corrosion allowance.

Regards
Hugh

Most standard chassis, particularly in the engine bay, are far from perfect spaceframe designs and have lots of bending load on some tubes. I wouldn't go thinner than 16SWG unless the design was being improved in these areas.