WHY DISK BRAKES USED AT FRONT & DRUM BRAKES AT REAR WHEELS

Kuna aina mbili za brake systems. DISC amabo mara nyigi zinawekwa mbele (front) au na nyuma, na zile za DRUM amabo lazima ziwekwe nyuma.

DISC BRAKES
Disc brakes, zinaoneka na kama ile CD ya muziki yaaani they use a flat, disk-shaped metal rotor that spins with the wheel. Ukikanyaga kwenye hizi brake, caliper na squeeze brake pads kwenye disc,  yaani, just as you would stop a spinning disc by squeezing it between your fingers, and slows the wheel.

 DRUM BRAKES use a wide cylinder that is open at the back, kuonekana kama ile ngoma ya muziki wa traditional. Ukikanyaga brake pedal, zile curved shoes ndani ya hii drum, zinakuwa pushed outwards, rubbing against the inside of the drum and slowing the wheel.

TOFAUTI KATI YA, DISC & DRUM, BRAKES
>>> Disc brakes ziko na ubora sana kuliko drum brakes for several reasons. Kwanza, disc breaks do a better job dissipating heat (kupoteza joto).

>>Mara nyigi au kila uki brake mara kwa marara au gafla kwa nguvu  (hard stops) au wakati unashuka mulima, disc brakes take longer than drum brakes to lose effectiveness!

>>Disc brakes ni bora kwakati nvua (wet weather), kwasababu ile centrifugal force tends to fling water off the brake disc and keep it dry, whereas drum brakes amabo ziko kama ndoo, they will collect some water on the inside surface where the brake shoes contact the drums.

WHY MANY CARS USE REAR DRUM BRAKE? Braking causes the car’s weight to shift forward; as a result, about 70% of the work is done by the front brakes. That’s why front brakes tend to wear out faster. Drum brakes are less expensive to make than disc brakes, largely because they can also double as a parking brake, whereas disc brakes require a separate parking brake mechanism.  Anyway, angalia hii video uone tofauti na ufanji kazi.