Chassis Materials

[maddox10]

Density
HDPE 0.95kg dm³
Aluminium. Between 2.7 and 2.9 kg dm³, depending on alloy. (better to err on the heavy side, Always pleasant to have some weight left after building)
Steel (hardox is low alloy steel) 7.9kg dm³

HDPE warping? Yes, it will always try to get into the original shape.
Very surprising to see a crooked wheel go straigth after a few days of rest.


1.3mm Hardox is rare as hens teeth. 3.2 is not rare , and 4mm is easely sourced.

You could do what we did for Perun. Take a big, thick sheet and mill it out to fit everything in.