Inboard Brakes, what they are and how they work.

What are they?

Inboard not mounted to any external component ie wheels, this type of braking system is mounted to the differential or a brakeshaft on the front of the vehicle.

Why?
The purpose of inboard brakes is to reduce unsprung mass within the suspension system on the vehicle, alot of old English sports cars used to have this arrangement, most noteworthy older JAAAGGs. And subsequently used in the back of hotrods, as they came on a subframe of sorts.
The lotus F1 car above car uses inboard brakes to improve centre of mass and inertia, as well as cooling, this is a compromise as it means running a small driveshaft to the brakes on the car.

Advantages
PACKAGING, a larger brake disc can be used without it being inside the wheel as a result less rotating mass as the wheel can be smaller.
Heat: brake dust and higher temps can be separate from the tires
improved roll centers, improved inertia, improved front brake cooling
solid fixed brake lines can be used.
SPRUNG MASS is lowered meaning ride can be softer, less time is spent overcoming inertia of the suspension and more is put on the tires.

Disadvantages of this system
HEAT: rear brakes where notoriously bad at cooling, not aided by poor aero of the time as well as the fact that it is mounted in a confined space under the vehicle
PACKAGING, area around the rear differential will need to be bigger.
TORQUE: the distance from the tire to the brake disc has significantly increased, meaning that any force will cause distortion in the drive/half shafts,however we are talking Nm here so there is a difference so the drive shafts need to be stronger
SERVICE: lower a diff to just do the brakes, hahahaha NO.

#GiveMeABrake #builtnotbought , #inboardbrakes . #oldstillgold

why not now? on modern cars?
I genuinely have no answer, well other than the diff thing.