Of course. However in the 332L and L2, it was subjected to lower torque and consequent bending/flexing/vibrations?/whatever other manifestations of stress might exist.
The EC225 seems to have reached the limiting threshold for welding in this application.
(Edited to add this genius idea.) How about thickening and extending vertically the wall of the lower shaft, at the top where it meets the upper shaft, cutting a screw thread into both shaft sections with suitable radii to minimise stress risers and screwing the shaft sections together?
I think I'll apply to be a consultant for Eurocopter. All I'll ask is Euro 250k per annum and little perks, like a comfortable pension.
Last edited by Colibri49; 24th Nov 2012 at 19:07.