problem with orientation leaves along curve

Hi
i want model somethong like leaf crown
so i make curve then create pipe from it and convert it to mesh
next i create one leaf and then create hair particles for pipe with object leaf
everything looks good but i want oriented leaves along my curved pipe .
Simply i want only small angle betwen leaves and curved pipe

Yes i try use comb but even if i click keep length it change length of my leaves dramaticaly
i try do curve guide but i dont understand it , second i try made force as wind which is pariculary works but i cant control it.

PS: if my pipe is not curved i can change Z of emiter object taht is work but not in curved

nobody helps ?