Hello zan29 and Friends
The one shown by Pilou, is Ok ,
but I believe that creating a Network, instead of
a Loft is better-
Cutting the curve into four parts instead of
two I have the edges to create the Network ,
that as a surface, respects better
the trend of the profile-
The file and a fairly explanatory image
at this link :
http://www.mediafire.com/file/kf25s3x6j6bmtt5/Loft-Network.zip/file
Have a nice day to all
al