The training video for old Navy mechanical fire control computers is a similar classic: https://www.youtube.com/watch?v=lr1uK24SND8
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How Differential Steering Works (1937) [video]
31–40 of 44 posts
Re: How Differential Steering Works (1937) [video]
#32Earlier quoted context omitted.
FWIW, there was a differential in the lego technic 8865 Test Car from 1988: http://www.technicopedia.com/8865.html I think this was the first model with a differential. At least, that's what introduced me to it.
The 8865 was the first model with a differential. I wrote about being an adult fan of lego[1]. Over time, I purchased all 7 "super cars" that Lego manufactured. One of each car was sold every ~5 years and each one improved the previous generation's already amazing gears, steering, etc. Fun fact: who is the largest manufacturer of tires in the world? [1] https://www.facebook.com/notes/alok-menghrajani/afol-adult-f...
You typoed, you meant the 8860 :) I actually saw it in a catalogue back in the day, but I hadn't realized it had a differential. It was also already old when I was into Lego technic in my teens, at which time the 8865 was new and shiny.
Edit: It also seems both the 8860 and the 8865 were using the same parts for the differential.
Re: How Differential Steering Works (1937) [video]
#33There's a flood of these mid-century instructional videos appearing the Web just over the past couple of years, right up to the present week. (I quite like the Jeff Quitney account on YT https://www.youtube.com/channel/UCM-kjdrQge9AACfB3MSRyrg , a fairly nice firehose of videos in good quality, which even seems to have some that aren't on the IA.) One thing I've taken from watching them is that US accents seem to have changed a lot in the past few decades: you hear presenters with accents that afaict don't seem to exist anymore. Jam Handy's is one, but there are more dramatic examples.
Re: How Differential Steering Works (1937) [video]
#34I wish, in school, teachers would have taught us things like this, how gears are just concurrent levers, how cams introduce asynchronicity to an operation. This is stuff I only started learning from working on and learning about cars. I remember even when I was in school (a good time ago now), they were already killing off shop classes and the like. How sad that schools couldn't see what values classes like that have…
Shop class material isn't on standardized tests, so --- no more shop classes.
Re: How Differential Steering Works (1937) [video]
#35There's a flood of these mid-century instructional videos appearing the Web just over the past couple of years, right up to the present week. (I quite like the Jeff Quitney account on YT https://www.youtube.com/channel/UCM-kjdrQge9AACfB3MSRyrg , a fairly nice firehose of videos in good quality, which even seems to have some that aren't on the IA.) One thing I've taken from watching them is that US accents seem to hav…
The TransAtlantic Accent! -> https://www.youtube.com/watch?v=Gpv_IkO_ZBU
Re: How Differential Steering Works (1937) [video]
#36Earlier quoted context omitted.
The 8865 was the first model with a differential. I wrote about being an adult fan of lego[1]. Over time, I purchased all 7 "super cars" that Lego manufactured. One of each car was sold every ~5 years and each one improved the previous generation's already amazing gears, steering, etc. Fun fact: who is the largest manufacturer of tires in the world? [1] https://www.facebook.com/notes/alok-menghrajani/afol-adult-f...
You typoed, you meant the 8860 :) I actually saw it in a catalogue back in the day, but I hadn't realized it had a differential. It was also already old when I was into Lego technic in my teens, at which time the 8865 was new and shiny. Edit: It also seems both the 8860 and the 8865 were using the same parts for the differential.
Yes, 8860. A few years before the 8865.
Re: How Differential Steering Works (1937) [video]
#37You can buy a Lego differential gear to keep as a desk toy: https://www.amazon.com/LEGO-Technic-Differential-connectors-...
My first exposure to a differential was building a Tamiya radio-controlled car kit. Those were great for learning some basic mechanics, and since you built them yourself they were easily repairable.
Re: How Differential Steering Works (1937) [video]
#38There's a flood of these mid-century instructional videos appearing the Web just over the past couple of years, right up to the present week. (I quite like the Jeff Quitney account on YT https://www.youtube.com/channel/UCM-kjdrQge9AACfB3MSRyrg , a fairly nice firehose of videos in good quality, which even seems to have some that aren't on the IA.) One thing I've taken from watching them is that US accents seem to hav…
You're referring to the Transatlantic accent, which was a contrived manner of speaking:
https://en.wikipedia.org/wiki/Mid-Atlantic_accent
Another odd, acquired accent is the manner of speaking employed during air traffic communications, with elongated R sounds, as when pronouncing words like "roger" over poor signal quality.
You can almost hear the air traffic control in mission control's transmission in 2001: A Space Odyssey, but only slightly:
Re: How Differential Steering Works (1937) [video]
#39The nice thing is, a planetary gearset can do basically the same, and is the building block of automatic gearboxes and Prius power distribution between ICE, electric motogenerator and wheels.
Relevant and amazing link: http://eahart.com/prius/psd/ Did a project based around the Prius PSD in my Mechanical Dynamics and Vibrations class. Very cool, really opened my mind to the power of gears.
Also, a youtube demonstration: https://www.youtube.com/watch?v=dLNDGUISTYM (this is the Toyota eCVT), and a teardown of the Ford version: https://www.youtube.com/watch?v=hHU5xFOBcsU
Re: How Differential Steering Works (1937) [video]
#40There's a flood of these mid-century instructional videos appearing the Web just over the past couple of years, right up to the present week. (I quite like the Jeff Quitney account on YT https://www.youtube.com/channel/UCM-kjdrQge9AACfB3MSRyrg , a fairly nice firehose of videos in good quality, which even seems to have some that aren't on the IA.) One thing I've taken from watching them is that US accents seem to hav…
The TransAtlantic Accent! -> https://www.youtube.com/watch?v=Gpv_IkO_ZBU
But listen to how he pronounces the 'o's (in particular) in "and it couldn't get a good enough grip on the road" and "both rear wheels to the engine" https://youtu.be/yYAw79386WI?t=164 : Handy surely didn't learn that from an elocution class teaching RP-lite. Is it a trace of an Irish accent? a Scandinavian-American "Lutheran" accent?