The Triumph Dolomite Club - Discussion Forum

Just to be a devil's advocate, rear discs aren't necessarily more powerfull than drums, however they have a more predictable response, recover faster from damp and fade, which is less likely in the first place, and don't harmonically resonate like a drum does at really high speeds, I loved the ...

Just to be a devil's advocate, rear discs aren't necessarily more powerfull than drums, however they have a more predictable response, recover faster from damp and fade, which is less likely in the first place, and don't harmonically resonate like a drum does at really high speeds, I loved the feel ...

A volvo 940 mastercylinder also fits straight on and I think has a 7/8 bore iirc, I loved all round disc brakes on my car, could stand on the brakes from any speed and there was zero issues with stability just a nice linear response and smooth with it!, next to no fade (v8 perfomance aside) and none ...

I reckon the gross weight of a classic is a limiting factor, as although the engine and gearbox are 200kg taken out, a decent motor,control system and battery are a fair bit more, still it's an interesting concept given torque and refinement possibilities.

So it's clearer, these are the various different arrangements I think have been discussed so far, shown A to E all in one diagram:

https://i.postimg.cc/8JRzVpQ6/calipers.png

I think we've, finally, reached agreement that A and B are different, and that, for the same individual piston area ...

Brackety/ frame,,,it does the same job, the hydraulic piston presses the pad into the disc,which slides along till it meets the other pad, then as the sandwich of parts meets resistance the force grows as per the sliding caliper surely.
You could even say the disc from its frame of reference stays ...

I mentioned unbolting the caliper but as I was concentrating on strut compression I was thinking of a disc purely clamped with no rotational torque.

Your example , if the second pad of the fixed single piston caliper is also fixed to the suspension leg then the suspension leg and bracketry is the ...

And additionally adding a second fixed pad to the first example , you just described a sliding caliper, except the disc is the sliding component instead.

In the second drawing , the green moments equal zero force all of the force is contained by the caliper body and if you unbolt the caliper it wouldn't move.
In the first example the caliper body is forced away from the disc and the reaction force comes from the disc itself.
Compression forces ...

If you put two jacks in series between a rigid frame, like the caliper, and measure the force at the junction between them, then when you pump one up to the internal pressure that gives 10kN on its piston, you will measure 10kN at the junction. If you then do the same work again and pump the ...

If you have a piston with an area of one square centimeter [how do I get superscripts in this place] supplied with hydraulic fluid at 100 kilo Pascals of pressure pressing down (with the cylinder in a frame fixed to the table), that would apply a force of 10N, through the pads and against ...

That's a hair under 10N , but yes the force bearing down has an equal but opposite force bearing up from the table and all parts are being compressed with a force of just under 10N even though there are '2' 10Nish forces at play


Damn, and I tried so hard to get it right :D

So that agrees ...

That's fair enough , but the first point with newtons 3rd law as stated that one piston producing 1N , fed through the strut and then causing a reaction of 1N naturally has the effect of 1N strut compression, if you then add a further 1N ontop of the 1N reactive force from piston 2, then the strut ...

marshman wrote: ↑Mon Mar 01, 2021 7:36 pm So in both case there is a compression force on the disc of 10N.

My opinion is that is true , if the caliper pistons are giving a 10N force , they interchange in the same manner as your example

Zero difference between them in essence , your example is like a caliper except the caliper body is replaced with gravitational pull, the weight is attracted to the earth through the table with 10N of force, and the earth through the table is attracted to the weight with a force of 10N in the ...