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His BB’s are good and correctly designed and manufactured, although it really isn’t hard, it’s just the bike industry trying to save pennies and 10g.
His bearing knowledge is correct
I don’t know enough about CFD to critique, however, what he says does make sense and matches what I have seen.
He very rarely backs up anything he says in a complete way, I suspect mainly because he’s used to working with competent people (in a certain field) where you can imply something and the rest is obvious to them. For instance when he’s rubbishing BB’s it makes complete sense to me as I understand bearings, however when he rubbishes someone’s aero/CFD then unless it’s very obvious I don’t get it. e.g. from latest video regarding energising the flow through the helmet vents is not obvious and I still don’t know why this is good?
Less swearing, more validation (other than “I am an expert”) would go a long way in my book, however, that’s not what always gets views as has been pointed out.
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It can be cheaper than materialise if you go direct to manufacturer, it is hard to model as the inner surfaces aren’t constant to save weight, also modelling thin walls with FEA is difficult to actually do efficiently so you can iterate through designs.
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1 iteration printed in Ti
About 60 hours to print, another day to finish and bond.
The machine to do it is an EBM machine, about the size of a small car on its end and costs about £500k to purchase.
Yep, there’s no reason for him to do any of it, I just enjoy the engineering part of it and would prefer more of that and less “clickbait’y” type stuff. But I appreciate it’s his own time and a side interest.