Hydraulic Steering – Principles of Operation (1956) [video]
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youtube.com
Chevrolet Suspension (1938): https://www.youtube.com/watch?v=ej7CRAIGXow
How Differential Steering Works (1937): https://www.youtube.com/watch?v=yYAw79386WI
How A Transmission Works (1936): https://www.youtube.com/watch?v=JOLtS4VUcvQ
And as a bonus, an explanation about transistors from 1953: https://www.youtube.com/watch?v=V9xUQWo4vN0
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.
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.
Is an excellent lemma. Applying it, of course, is what's very difficult :)
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.
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.
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.
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Yes, most hydraulic systems today have been replaced by electric power steering, which uses electronic sensors to determine how much assist to apply via an electric motor.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.
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.
We have a 1947 Willys CJ-2A, which I believe is worm and sector, though we haven't gotten into the steering yet because there are so many other things wrong with it. Including, it seems, the formerly working brakes. I discovered they had crapped out as I was backing up near a bunch of formerly neatly stacked cinder blocks.
In 2005, it's horribly wrong.
I think for non power assist recirculating ball is nicer because it doesn't transmit road forces back to the driver like rack and pinion does. (Could be wrong)
one small nit to pick
many modern electric power steering systems are still hydraulic by nature. It's sometimes the case that the electric motor is driving fluid to enact the resistance change. Many cars that use Bosch electronics/driving-aids still work this way, electro-hydraulic pumps in a feedback loop with pressure sensors/steering angle sensors/IMUs/vehicle dynamics sensors (speed/angle/yaw/etc).
That said, fluid-less electronic-exclusive systems now exist and are in common-use, so you're not wrong at all -- just pointing out that there are many ways to skin that cat.
I know stuff like the MR2 is like that, but I'm guessing that's because the engine is in the wrong place to have normal power steering.
No they aren't. I have a car with EPS (electronic power steering) and it isn't playing any tricks. It's just an electric motor. What you are talking about is EHPS (electro-hydraulic power steering). Stop mixing up your terminology.
A difference of year (as here) is quite common.