←back to thread

183 points zdw | 1 comments | | HN request time: 0.201s | source
Show context
GuestFAUniverse ◴[] No.45943502[source]
"...satisfying handle..."

I detest that sentiment. The brake handles I had to use sooner or later were too soft, no matter the maintenance. So, I started to pull as strong as possible because otherwise the cars weren't standing still on steep hills -- I never had that issue with electric parking brakes; I love that.

replies(5): >>45943693 #>>45943703 #>>45944165 #>>45944527 #>>45944564 #
cenamus ◴[] No.45943703[source]
And manual parking brakes aren't really wonders of mechanical simplicity anyway
replies(2): >>45943735 #>>45943865 #
somat ◴[] No.45943865[source]
The real magic/genius are trailer brakes, they are electric right, however if they worked the way you would naively assume an electric brake would work, directly operating on the friction surface with an electric solenoid, It would take a huge solenoid and the amperage requirements would quickly exceed what the trailer wiring can provide. so what they do is apply an electromagnet which starts to drag on the side of rotating wheel assembly it uses this drag to push the friction surfaces together, so it takes a surprisingly small magnet to run. most of the force comes from the rotating wheel.
replies(1): >>45944514 #
1. meindnoch ◴[] No.45944514[source]
That's the "self-applying" property of drum brakes. Not specific to trailer brakes.