5 ms·
Hydraulic Steering – Principles of Operation (1956) [video]
- bshacklett 3y agoThese are some of the best explanatory presentations in existence. I would love to see them analyzed to better understand how they are so effective.
- mikewarot 3y agoEliminate jargon, simplify as much as possible... but no more. You can explain almost anything to anyone, if you recursively apply this technique.
- andrepd 3y ago>simplify as much as possible... but no more Is an excellent lemma. Applying it, of course, is what's very difficult :)
- Animats 3y agoIt's very 1950s military. They never mention that this is a simple feedback control system. The mechanics that maintained the thing had to know that, since it's vulnerable to the oscillation and lag problems of a simple proportional control system. Those feel like steering wheel vibration and slop to the driver. This is for an off-road heavy truck, not a sports car, so a little lag is not so bad. The very large vehicle at the end is the M65 Atomic Cannon.
- jeffrallen 3y agoThe secret is in the spline! Also: this is not how modern power steering systems work.
- kube-system 3y ago> Also: this is not how modern power steering systems work. Yes, most hydraulic systems today have been replaced by electric power steering, which uses electronic sensors to determine how much assist to apply via an electric motor. Mechanically, it is simple and very low maintenance.
- genter 3y agoWell, even before electric power steering became popular, rack and pinion steering was/is used in almost all passenger vehicles. The only vehicles that I can think of that use a steering gear and pitman arm like this video are 1 ton Ford/Chevy/Dodge and the Jeep Wrangler.
- calvinmorrison 3y agoDoesn't the XJ have a steering box as well?
- genter 3y agoI was only looking at vehicles from this millennia. 80 series Land Cruiser and 4wd Toyota trucks from the early 90's had a steering gear too, and I'm sure some others that I don't care about.
- mauvehaus 3y agoI thought recirculating ball[0] was commonly used in most passenger vehicles, and rack and pinion was more common in sports cars. [0] https://en.m.wikipedia.org/wiki/Recirculating_ball https://en.m.wikipedia.org/wiki/Recirculating_ball
- serf 3y agorack and pinion has been the standard for nearly all smaller passenger vehicles since at least the early 90s. you can find things like that or like pitman arms on larger/industrial vehicles fairly commonly, though. to your point, however, yes -- sports cars were the first ones to popularize the method. Rack and pinions tend to feel less 'sloppy' , especially after some use. The idea stuck around in the industry though because it results in less customer complaints and requires less finesse from the mechanic during install/maintenance. tuning a 'steering box' is a lost art relegated to hot-rod folks at this point.
- 3y ago
- creeble 3y agoMore like "hydraulic power-assist steering" in modern terms. With modern "hydraulic steering" it tends to imply no mechanical coupling between the steering wheel and the movement of the wheels/rudder/motor. A hydraulic leak or pressure failure therefore causes catastrophic loss of steering.
- serf 3y agoabsolutely; this is a power assist system. actual hydraulic steering is common on boats, however. [0] as stated , systems like this can fail catastrophically and are not often used on things like land vehicles; boats often have a fail-safe in that the rudder/motor will have a manual 'override' in the form of a manual tiller 'socket' for a wrench or emergency tiller that stays out of the water until needed. [0]: https://www.youtube.com/watch?v=9yO4MBtk3gI https://www.youtube.com/watch?v=9yO4MBtk3gI
- bramhaag 3y agoSimilar videos about cars: Chevrolet Suspension (1938): https://www.youtube.com/watch?v=ej7CRAIGXow https://www.youtube.com/watch?v=ej7CRAIGXow How Differential Steering Works (1937): https://www.youtube.com/watch?v=yYAw79386WI https://www.youtube.com/watch?v=yYAw79386WI How A Transmission Works (1936): https://www.youtube.com/watch?v=JOLtS4VUcvQ https://www.youtube.com/watch?v=JOLtS4VUcvQ And as a bonus, an explanation about transistors from 1953: https://www.youtube.com/watch?v=V9xUQWo4vN0 https://www.youtube.com/watch?v=V9xUQWo4vN0
- jetrink 3y agoMy favorite old explainer video, telephone switching (1951): https://youtu.be/xZePwin92cI https://youtu.be/xZePwin92cI About the Strowager Switch, which was invented by an undertaker who was fed up with the local telephone operators whom he suspected of diverting phone calls to his competitor.
- tzs 3y ago> And as a bonus, an explanation about transistors from 1953 And here is a 1959 video from the same source about wave behavior [1]. It covers reflection from open and closed ends, superposition, standing waves and resonance, impedance mismatching, and tapered-section transformers all in a way that makes it really easy to understand. [1] https://www.youtube.com/watch?v=DovunOxlY1k https://www.youtube.com/watch?v=DovunOxlY1k
- nvahalik 3y agoI remember watching this studying for my Extra license and it really helped!
- userbinator 3y agoThis is a very early type of power steering gear, with the separate power cylinder and axial spool valve; I believe this is still common on very large trucks today, but in 1959 the Saginaw integral rotary-valve gear was introduced and basically became an industry standard for domestic (and some import) cars up into the 90s, and continued for light trucks after that to this day with some small variations. The accompanying integral-reservoir pump (also known as the "ham can") has also remained nearly the same over that timeframe.
- matricaria 3y agoWhy does that title here and on YouTube say 1956 when the video itself says 1955?
- defrost 3y agoWithout diving into the weeds on this specific video it's quite common for film footage to show copyright | filmed on | final edit | etc dates that relate to production that don't match IMDB, library of record, etc dates that refer to the date of first public airing, the publishing date if you wish. A difference of year (as here) is quite common.