Hydraulic Steering – Principles of Operation (1956) [video]

https://www.youtube.com/watch?v=VDiOKqMKTO8

by baazaar • 3 years ago

47 29 3 years ago

bshacklett• 3 years ago

These 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• 3 years ago

Eliminate jargon, simplify as much as possible... but no more. You can explain almost anything to anyone, if you recursively apply this technique.

andrepd• 3 years ago

simplify as much as possible... but no more

Is an excellent lemma. Applying it, of course, is what's very difficult :)

Animats• 3 years ago

It'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.

jeffrallen2• 3 years ago

The secret is in the spline!

Also: this is not how modern power steering systems work.

kube-system• 3 years 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Yes, most hydraulic systems today have been replaced by electric power steering, which uses electronic sensors to determine how much assist to apply via an electric motor.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.

genter2• 3 years ago

Well, 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.

serf3• 3 years ago

Yes, most hydraulic systems today have been replaced by electric power steering, which uses electronic sensors to determine how much assist to apply via an electric motor.

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.

creeble• 3 years ago

More 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.

serf3• 3 years ago

absolutely; 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

bramhaag• 3 years ago

Similar videos about cars:

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

jetrink• 3 years ago

My favorite old explainer video, telephone switching (1951): 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• 3 years 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

nvahalik• 3 years ago

I remember watching this studying for my Extra license and it really helped!

userbinator• 3 years ago

This 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• 3 years ago

Why does that title here and on YouTube say 1956 when the video itself says 1955?

defrost• 3 years ago

Without 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.

Hydraulic Steering – Principles of Operation (1956) [video]

Related Stories