Rear rails

Here is a side view of the frame. I think I see the "knee" in the rails. not exactly sure where the ends of your straight edge are contacting. I think I added the red line where you are. Counting pixels, from the line to the knee in the rail is about 0.5"

If you copy and paste into Paint, the drawing is 130cm long

On purely a speculation, I'm guessing that the 1/2" "knee" is a designed in "crown" in what is essentially the main beam of the car.

You can see that in steel long span structures, wood frame joists and even on flat bed trailers to compensate for the natural intended bending of them under load.

I never heard of that in the design of cars since the length of the "span" from front to rear axles isn't usually that long but it does make sense that there is provision for it.

I've said it before and I'll repeat: there are almost no straight lines anywhere on Tom Tjaards's Panteras. But it only really matters when you're trying to align the wheels.

quote:

he rear rails of my Pantera are not straight, they are slightly bent, the two sides are exactly the same and I think it's normal

To answer your question then YES, the rear frames all have this bend

Thank you all for your answers, I am now completely reassured

here is a compsite of a couple frame parts drawing showing how it is fabricated