51–60 of 148 posts
And now differentials are basically obsolete - not needed in electric cars.
Great stuff. Making me think how simpler electrocars are: no differentials, no transmission, no complex injection machinery.
Earlier quoted context omitted.
The general motors today is not the same company that made this video. In 2008 the original general motors was effectively dissolved, the current GM simply purchased some of their assets, which happened to include their names and trademarks.
Do you have a source to explains how you're describing this? I'm aware of government (financial) aid, as well as appointing government officials to "consult" and direct restructuring, but it's much less clear that it was "effectively dissolved" or that a "new" General Motors purchased assets from the old one. https://www.politico.com/story/2018/12/19/bush-bails-out-us-...
https://en.m.wikipedia.org/wiki/General_Motors_Chapter_11_re...
And now differentials are basically obsolete - not needed in electric cars.
Why is that? Tesla Model 3 for example uses 1 or 2 motors, not one per wheel, so they still need to add variable speed to left vs. right wheels, right?
Earlier quoted context omitted.
I was expecting explanations to begin shortly, got bored after the second stunt. The format is, frankly, horrible. This must be the analog of the "You want a tutorial to do X? Lemme record myself writing painfully slowly in "New Document.txt to explain it." style of tutorials.
The explanation, if you get past the 2 minutes of the synchronized motorcycle-riding, is remarkably lucid and to the point. It starts from the most primary considerations and fully explains the concept. It is neither dumbed down nor laden with jargon. I wish more general-audience presentations today strived for the same. What more can you possibly want? Perhaps the patience level of audiences of that era was much hig…
https://en.wikipedia.org/wiki/History_of_the_motorcycle#The_...
How would films like this be consumed in the 30’s? Would it be shown in theaters before a feature film?
Another comment pointed out that these were made by the Jam Handy Organization[0]. Just hypothesizing, but either GM might distribute these and have showings for staff as part of training. Almost certainly not for the engineers that already learned this but perhaps sales staff so they could better explain the mechanism and benefits to buyers. [0] https://en.m.wikipedia.org/wiki/Jam_Handy
Video says nothing about forces, however. With this explanation it seems that if one wheel gets slightly stuck, the other wheel gets all the force, causing a dangerous spinning.
Hence, if one wheel is stuck, it still receives the same force as the other, only speed is lower.
What is more annoying is when one wheel is freely slipping (like on ice), the other will have nearly no force applied to it and the car is stuck.
The style in those old films is so relaxing and pedagogically great. Has anyone else noticed that today's educational content intended for adults increasingly uses a format that was regionally only used for very young children? There is almost always personality emoting and doing accidentally on purpose funny things and laughing, exaggerating everything to keep people engaged.
The style in those old films is so relaxing and pedagogically great. Has anyone else noticed that today's educational content intended for adults increasingly uses a format that was regionally only used for very young children? There is almost always personality emoting and doing accidentally on purpose funny things and laughing, exaggerating everything to keep people engaged.
All his videos are absolutely phenomenal - the best educational content I've seen on YouTube. I cannot recommend them highly enough. In my experience it is more akin to reading a (very engaging) textbook than watching a video. I often find myself pausing to think things through and can _feel_ myself grasping at new ideas and learning while watching.
[0] https://www.youtube.com/channel/UCYO_jab_esuFRV4b17AJtAw [1] https://www.youtube.com/watch?v=lG4VkPoG3ko
Video says nothing about forces, however. With this explanation it seems that if one wheel gets slightly stuck, the other wheel gets all the force, causing a dangerous spinning.
The differential (ignoring locking ones) applies the same force (approximately) to both wheels. If you remember your physics course about lever and force, see the video at 5:00, you can see that the lever is pushed by its center, hence both sides have the same length. So the same force is applied to both wheels. But the speed can be different. Hence, if one wheel is stuck, it still receives the same force as the othe…
This is not necessarily true. Imagine a similar symmetric lever with a weight on one side, and a force on the axis that accelerates rotation. The acceleration of both ends of the lever are equal, but the force is not equal (since the weight is 0 on the other end).
Anyway, the point of my comment was that a thorough analysis of this configuration is more involved than this video of which it was claimed that it "perfectly" explains how this works.