I had an Audi 90 with warped discs, and I definitely felt that through the brake pedal especially at very low speeds, even though the brakes were assisted.

The only other time I've felt anything through the pedal is in snow, when ABS kicked in. That was a weird first experience, lemme tell ya.. the first time your brake pedal pushes back.. the downtrodden worm that turned.. woo! I was like.. WTFFFFFF? Not what I needed while trying to concentrate on missing someone's mailbox!

I wouldn't ever pay what would need to be spent, to get force feedback in my pedals. For me, variable bitepoints would be sufficient achieved by some kind of cam to alter resistance along the plane of travel would be far more my thing.

warped discs and ABS are very rare in racing cars, which or course is what LFS simulates.
i dont dispute the fact u can feel a warped disc or ABS, just not the wheels locking, pads moving a couple of mill.. etc..

Next Thursday?

In all seriousness I'm with Sam on this one. Sorry.

Didn't read all the thread - got bored of the repeating comments...

You will NOT feel tyre behaviour or anything very useful through the brake pedal. You will only feel relative motion in the brake disk - warping, grooves, the transition from static to dynamic friction (which you can feel). Tyre flex, suspension travel do not move the disc relative to the caliper, and therefore provides no pressure change in the brake fluid to get back to your foot.

Clutches - it's not force feedback, but you can feel the biting point as the clutch springs take over from the release mechanism (either fluid or cable based).

Throttle - there is no single real car with any form of force feedback on a throttle pedal. TC sometimes does, but the fitment of that disgusting technology immediately renders that car a GRANNY car, and as such not appropriate for this conversation.

So, I don't think force feedback pedals are really required. The clutch could be done with some clever springing (so the biting point is always the same, unless you want simulation of weak clutch springs), and a clever calibration routine to make sure the sim knows where the biting point should be. A brake pedal and a throttle pedal do not need any form of feedback, as all the cues you need would be seat of the pants (and thus replaced with visual and aural cues).

Quote from tristancliffe :

You will only feel relative motion in the brake disk - warping, grooves, the transition from static to dynamic friction (which you can feel).

so how exactly can you feel a force acting orthorgonal to the one youre applying ?

i agree on all the rest of your post though although i think for the road cars an ff brake to simulate how the brakepedal goes mushy with brake fade would be fun and add to the immersion

I don't know exactly, but it's like the disc 'grabs' the pad a bit, just enough for you to be able to feel it. But it's almost completely overwhelmed by the forces on your body and sounds in your ears.

I would test it on the public road, but I scared myself crapless last night on a very large wet roundabout (full opposite lock to full opposite lock several times in a HUGE tankslapper, and missed about 4 kerbs by mm at the most), so I'm in careful driving mode for a few days or so

hm well ive only ever locked up on wet or snowy roads so there never was much force involved
but still the only way i can imagine that you might feel it would be if the brake pads lifted a bit on one side from the sudden change in disk speed though it doesnt make much sense now that ive typed it down