Helix bikes are welded inside an inert vacuum chamber to mitigate problems working with titanium. What is puzzling though is there cannot possibly be inert vacuum chambers large enough to accommodate anything the size of $100M+ fighter jet aircraft.That means either (a) inert vacuum chambers are not really necessary to effectively work with titanium, or (b) the most sophisticated fighter jets have structural integrity problems. Neither observations are consistent with all the type about sub-sonic titanium bicycles.

Nearly 6 am Jan 1...awggh... exhausted but just can't fall asleep.