Hi, not knowing how much of a curve you are talking about this may not
work, but if not too sharp, simple gelatine can be cast and literally blown
out of the tube. We use agar in the lab and fairly high % stuff can be
pretty stiff but still flexible. Gelatine is likely about the same. With
some care, even if it breaks a little, you might be able to get some
measurement.
Again, not knowing how sharp a turn and how precise you need to be, this may
not work.