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A Different Kind of Disc Brake: 1949 Chrysler (2023)
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Re: A Different Kind of Disc Brake: 1949 Chrysler (2023)
#12[flagged]
Re: A Different Kind of Disc Brake: 1949 Chrysler (2023)
#13Ausco Products do indeed appear to still be making these brakes. Here's one of their retrofit systems for Land Cruisers: https://www.auscoproducts.com/wp-content/uploads/2023/03/102...
Re: A Different Kind of Disc Brake: 1949 Chrysler (2023)
#14So initially I thought it was just a drum brake that applied the braking force on the face of the drum in stead of on the circumference. But it seems the key invention here is some camming system that automatically increased the braking force as speed increased. So this system supposedly did not require a brake booster as part of the hydraulics. I wonder what prevented this camming innovation from being transferred t…
> A conventional drum or disk brake is kind of fail safe in that regard: The mechanical pressure from the brake pads is not transferred through any fasteners.
A slight nitpick, the torque applied to the caliper from the disc, through the pads, does travel through the caliper mounting bolts. It's a lateral force rather then a axial one but it does go through fasteners.
Re: A Different Kind of Disc Brake: 1949 Chrysler (2023)
#15My dad and I have an old Case backhoe that we got with bad brakes. Turns out they're very similar to this design, with a ball and ramp assembly that pushes clutch discs outward into friction surfaces. A couple notable differences are that they use a a band around the disc assembly, connected to the pedal, that slows the disc assembly causing the ramps to engage. And also, they're attached to a couple of splined shafts coming out of each side of the differential, rather than on the wheels/axles. Anyway, apparently they're notoriously troublesome, and were a lot more difficult to rebuild than I would have thought.
Re: A Different Kind of Disc Brake: 1949 Chrysler (2023)
#16The pads are very thin and i dont see how they could be made thicker, them being inside the mechanism. I am not sure they would last nearly as long as conventional pads.
I don’t know enough to comment on the design overall, but my immediate thought was it looked much harder to replace the pads than in disk or drum brakes.
Re: A Different Kind of Disc Brake: 1949 Chrysler (2023)
#17Another different sort of disc brake was Audi's UFO setup. Essentially it was to maximize rotor surface area under 15" rims:
https://www.fcpeuro.com/blog/reinventing-the-rotor-audis-ufo...
Re: A Different Kind of Disc Brake: 1949 Chrysler (2023)
#18Interestingly, the ball and ramp mechanism persists in mechanical disc brakes for bicycles, at least on the Avid BB-7's (possibly others, those are the ones I have).
In that case the ball and ramp are in the caliper attached to the frame. I don't think they're self-energizing in that application; the balls aren't all traveling in the direction the rotor is.
I'd say they're at least 85% as good as hydraulic disc brakes while being 1% of the hassle to maintain.
Re: A Different Kind of Disc Brake: 1949 Chrysler (2023)
#19Interestingly, the ball and ramp mechanism persists in mechanical disc brakes for bicycles, at least on the Avid BB-7's (possibly others, those are the ones I have). In that case the ball and ramp are in the caliper attached to the frame. I don't think they're self-energizing in that application; the balls aren't all traveling in the direction the rotor is. I'd say they're at least 85% as good as hydraulic disc brake…
What is the hassle with maintaining hydraulic disk brakes on a bicycle? On my motorcycle, you replace the brake fluid and inspect the rotors to make sure they are in tolerance every couple of years, check the pads for wear, the lines for damage and replace if needed every oil change, and that is pretty much it. I would imagine that bicycle hydraulics are even easier to maintain, if only because they don't have nearly as much energy to dissipate as motorcycle brakes do.
Re: A Different Kind of Disc Brake: 1949 Chrysler (2023)
#20Interestingly, the ball and ramp mechanism persists in mechanical disc brakes for bicycles, at least on the Avid BB-7's (possibly others, those are the ones I have). In that case the ball and ramp are in the caliper attached to the frame. I don't think they're self-energizing in that application; the balls aren't all traveling in the direction the rotor is. I'd say they're at least 85% as good as hydraulic disc brake…
What is the hassle with maintaining hydraulic disk brakes on a bicycle? On my motorcycle, you replace the brake fluid and inspect the rotors to make sure they are in tolerance every couple of years, check the pads for wear, the lines for damage and replace if needed every oil change, and that is pretty much it. I would imagine that bicycle hydraulics are even easier to maintain, if only because they don't have nearly…
The bicycle parts are lighter/smaller/cheaper. They are more fiddly. But energy-wise, because they are so much smaller/lighter/cheaper they are dissipating a smaller amount of energy across a vastly smaller set of parts. Heat is still an issue. A 500lb motorcycle+rider dissipates heat across a pair of front disks, both of which can weigh more than an entire bicycle front wheel. A 200lb bicycle+rider focuses everything on a single disk that weighs in at a couple ounces.