Part of Helix in WWI (Assassin's Creed: Syndicate)

In general, I collected everything in the First World War, completed all the tasks there, but I cannot get one particle of Helix. It is located on the bridge and, in theory, I should have got it by making a leap of faith, but when I do it, the heroine flies a few meters from the particle. I have already tried jumping from different places and from cables, all in vain. Maybe someone knows how to get it?