reduced size in flat model

[Tarkus]

Hello everyone,:smile:
someone can explain why a straight side (the red one in the attached file) of a piece, held with a loft, if I mix it in the folded model is 240 mm long,
If I mix it in the flat model, it's reduced to 233 and pickles?
thanks in advance to those who want to take a look

 

[diegus]

It's really weird. I tried to make loft in the sheet metal environment and result is to say little strange.
cmq in your case may be due to the k factor which calculates the stretching of the sheet when folded. I'm going for an idea!