wow its amazing how far material science has come. This video is good for a basic idea of crystalline structures but is very outdated at this point. Still enjoyed it!
Our practical metalworking experience is all lost with retired skilled workers and closure of US factories. So, we've fallen waaay behind our forefathers. This is why modern metal parts don't last as long and no longer have "old world craftsmanship" that lasts 100s of years.
Actually we haven't. The reason why stuff back then didn't break was because they used enormous amounts of material because they had much less control of variance in quality. Today we make things lighter using less materials for both economical reasons and for environmental reasons. We can do this partially because the overall quality is higher, but also because the overall quality is more uniform. I'm sure you CAN still order a steel bike using twice as thick tubes as needed, and with cast iron wheels weighing a total of 30 kg and costing a fortune if you think that's better than a modern cheap aluminium bike weighing 10 kg for a fraction of the cost.
I think that's his point though. Engineers today have all the atomic knowledge but often don't know how to use basic hand tools (not saying you don't). They create lightweight parts in CAD that are often impossible to fabricate and service. Being able to tie real world experience with advances is the tricky part.
![Heat Treating Aluminium [Easy DIY method]](/img/n.gif)
omfg every time I need to learn something I have to go to 1 of these 60 is a shame we don't mAke these types of videos anymore.
wow its amazing how far material science has come. This video is good for a basic idea of crystalline structures but is very outdated at this point. Still enjoyed it!
Our practical metalworking experience is all lost with retired skilled workers and closure of US factories. So, we've fallen waaay behind our forefathers. This is why modern metal parts don't last as long and no longer have "old world craftsmanship" that lasts 100s of years.
Actually we haven't. The reason why stuff back then didn't break was because they used enormous amounts of material because they had much less control of variance in quality. Today we make things lighter using less materials for both economical reasons and for environmental reasons. We can do this partially because the overall quality is higher, but also because the overall quality is more uniform. I'm sure you CAN still order a steel bike using twice as thick tubes as needed, and with cast iron wheels weighing a total of 30 kg and costing a fortune if you think that's better than a modern cheap aluminium bike weighing 10 kg for a fraction of the cost.
@Dave Cockayne Yeah, pretty impressive. The cheap ones are... a bit... heavier though. :)
I think that's his point though. Engineers today have all the atomic knowledge but often don't know how to use basic hand tools (not saying you don't). They create lightweight parts in CAD that are often impossible to fabricate and service. Being able to tie real world experience with advances is the tricky part.
16:07 - I ran a hydropress many years ago. Material blanks were usually cooled to -40F before forming, else the hardened aluminum would crack.
Any idea when this film was made?
my chatters teacher is making him watch this and re redeemed it to watch
!who
who cares pogO