Parking on an Incline [Merged]

[StraightSix]

ang prob nito eh tulad nung sabi sa isang thread, pag nabangga ka buong makina mo sira

Lesser of 2 evils lang yan ... ano mas ok sa iyo? Masira makina o mahulog sa bangin yung buong kotse? Kung normal lang yung inclination eh kayang-kaya ng parking brake yan. Kung hindi nyo napapansin, maraming malaking bato sa mga sidewalk ng Baguio dun sa mga matarik na kalsada. Para sa peace of mind yon, hehe.

When parking in a steep incline, park your car in gear and turn your wheel and let your tire rest slightly on the kerb (British ). The direction of the wheel depends on the scenario that if your car ever rolls down, the front wheel will rest on the curb and hopefully stop the car. Always take into account where your car might roll down.

[chris_d]

Cguro para sure pwede ka rin magdala ng isang brick lagi sa trunk for those times you need peace of mind...

Ako sa matic usually una handbrake then P.

Sa manual naman switch off, then handbrake, then lagay sa 1st gear, nde naman cguro masisira yung gear pag nabangga, naisip ko lang parang sa tulak start, naka gear yun dba...

[StraightSix]

Cguro para sure pwede ka rin magdala ng isang brick lagi sa trunk for those times you need peace of mind...

I used to do that in Baguio. I had this wedge-shaped rock stored in the trunk, 45 degrees pa angle

Minsan yung kotse ng kapitbahay ko gumulong ... tinamaan muna yung sasakyan ko then diretso sa ibaba ng kalsada. Minor lang damage sa bumper ng sasakyan ko, swerte at hindi natinag, pero na-demolish nung gumulong yung sari-sari store sa ibaba.

[quiksie]

Cguro para sure pwede ka rin magdala ng isang brick lagi sa trunk for those times you need peace of mind...

yun brick bisaya for brake haha pangpigil ng sasakyan. handbrake lang katapat niyan. Pag alanganin lagyan ng kalso. or pag may gutter ipaling ng konti ang gulong towards the gutter para pag umatras man tatama gulong mo sa gutter

[empy]

Cguro para sure pwede ka rin magdala ng isang brick lagi sa trunk for those times you need peace of mind...

ok yan, dual-purpose. pwede ding pambato sa mga goon squad drivers :D

[GlennSter]

my theory is..hindi sa brake ang stress.

sa handbrake cable=)

[StraightSix]

my theory is..hindi sa brake ang stress.

sa handbrake cable=)

[oldblue]

http://auto.howstuffworks.com/drum-brake3.htm

brake shoes ng drum brake ang stress.

[StraightSix]

http://auto.howstuffworks.com/drum-brake3.htm

brake shoes ng drum brake ang stress.

Stress is force per unit area, and in this case, we are talking about the force necessary to keep a vehicle parked in an incline.

Are you saying that an area such as the surface of the brake shoes (in contact with the brake drum) has more force per unit area than the cross-sectional area of the hand brake cable?

[oldblue]

Stress is force per unit area, and in this case, we are talking about the force necessary to keep a vehicle parked in an incline.

Are you saying that an area such as the surface of the brake shoes (in contact with the brake drum) has more force per unit area than the cross-sectional area of the hand brake cable?

mayroon pa break adjuster to keep brake shoes fit

http://auto.howstuffworks.com/drum-brake2.htm

[StraightSix]

mayroon pa break adjuster to keep brake shoes fit

http://auto.howstuffworks.com/drum-brake2.htm

Alam ko ang adjuster Tingin ko lang hindi tayo magkaintindihan ...

When I seconded GlennSter's opinion that the stress is on the handbrake cable, it meant the most stressed part when parking on an incline and I'm sure that's what he also meant. Of course there is also stress on the brake pads, and on other parts for that matter, but not as much as on the cable.

Even if you assume a ratio of 1:10 (very conservative) for the sectional area of the cable vs. the area of brake pad, the force on the cable will be roughly 10x than on the same area on the pad. And that's why I explained that stress is force per unit area, to emphasize that stress is related to area.

[oldblue]

Alam ko ang adjuster Tingin ko lang hindi tayo magkaintindihan ...

When I seconded GlennSter's opinion that the stress is on the handbrake cable, it meant the most stressed part when parking on an incline and I'm sure that's what he also meant. Of course there is also stress on the brake pads, and on other parts for that matter, but not as much as on the cable.

Even if you assume a ratio of 1:10 (very conservative) for the sectional area of the cable vs. the area of brake pad, the force on the cable will be roughly 10x than on the same area on the pad. And that's why I explained that stress is force per unit area, to emphasize that stress is related to area.

assuming *mazdamazda's car is an automatic, there are two stress points.
the parking break mechanism & the emergency break cable-triggered locked drum brakes.

from here http://auto.howstuffworks.com/automa...smission12.htm


The output of the transmission: The square notches are engaged by the parking-brake mechanism to hold the car still.

when *mazdamazda shifts to P, the parking brake mechanism engages/locks the notches of the output shaft. therefore 1st stress point.

when *mazdamazda activates the emergency brake, the cable triggers
the brake shoes to lock the circular drum brake with another help from break adjuster. see link of break adjuster. the drum brake on each of mazdamazda's rear wheel locks as 1 unit drum brake (in each rear wheel). therefore, 2nd stress point.


assuming *mazdamazda's car is a manual, then the the 2 drum bakes on each side are the lone stress point coz there is no P-break mechanism (for automatic) in manual.

am not really familiar with force per unit area = stress. but I did pinpoint 3 stress point area for automatic (2 drum brakes & 1 P-mechanism), 2 stress points for manual (1 drum brake).


that's why I'm not really convinced that the handbrake cable is the most stressed when parking on an incline. it's just like tying *mazdamazda car with the same cable to a tree when parked in incline, and all of *mazdamazda's car weight is held by the cable alone, coz as you said it's the most stressed part. it's not realistic. I believe the cable is used to trigger the locking mechanism which is the drum brake system.


but I'm still confused, if drum brakes are locked, then forces cancel out.
what keeps *mazdamazda's car from moving down the incline?

perhaps, it's the tires (the real wheels in particular) that is the most stressed. the tire's traction with the inclined pavement. the newer the tire the better the traction, the older, the greater chances of skidding (coz of the absence of friction between the tire and the pavement).

am still not convinced with this theory though hehehe

but I did learn something new today, automatic transmissions are safer to park in incline position than manual ones, coz of dual-locking mechanisms. (the P-break mechanism & emergency brake).


of course, manual ones can shift to 1st gear but there is danger when it gets accidentally hit by another car. automatic cars with P-break mechanism are independent of the gears, coz it locks the output of the transmission.

[miluku]

Hi, quick question lang po.. may nag mention ng "metal-to-metal" na sound .. napansin ko yan sa matic.. ok lang ba yun? minsan kakatakot.. baka maputol... ganun din sa inyo?

[oldblue]

Hi, quick question lang po.. may nag mention ng "metal-to-metal" na sound .. napansin ko yan sa matic.. ok lang ba yun? minsan kakatakot.. baka maputol... ganun din sa inyo?

Sometimes, deep scores get worn into brake rotors. This can happen if a worn-out brake pad is left on the car for too long. Brake rotors can also warp, that is, lose their flatness. If this happens, the brakes may shudder or vibrate when you stop. Both of these problems can sometimes be fixed by refinishing (also called turning or machining) the rotors. Some material is removed from both sides of the rotors to restore the flat, smooth surface.

http://auto.howstuffworks.com/disc-brake4.htm

[finchy18]

sa matic pwde na P yata kahit 45 degress nka park kasi designed for Parking talaga ang P sign. hehehe.joke kapag sakin sa manual ko okey cguro kpag nka first gear on or nka hand break. i dont know if nka stress ito sa baby ko.

[scarab]

..incline garage namen before. nanikit yung handbrake, ayaw bumaba nung oto after releasing the handbrake, so pinwersa ko. had it checked afterwards buti walang na-damage sa preno. only happened once.

[miluku]

thank you.. =) hay.. i still prefer manual.. la pa ako tiwala talaga sa matic.. tulad kanina.. ganun na naman.. biro mo.. mga 15deg lang.. nag "tuk" na naman nung nag change ako P to D. pano pa kaya kung park mo sya matagal sa pababa na parking sa eastwood.. hahahaha!!!

[oldblue]

thank you.. =) hay.. i still prefer manual.. la pa ako tiwala talaga sa matic.. tulad kanina.. ganun na naman.. biro mo.. mga 15deg lang.. nag "tuk" na naman nung nag change ako P to D. pano pa kaya kung park mo sya matagal sa pababa na parking sa eastwood.. hahahaha!!!

just trust the P shift even if you are parked on a hill ... the rolling is normal after P bec. it is engaging the notches of P-break mechanism. if you're moving out naman, the sound you hear from P to D, is just the disenganging of the notches.

http://auto.howstuffworks.com/automa...smission12.htm

[cutedoc]

solve na ako sa
parking : foot brake, N, P, hand break
moving : foot brake, hand break, D or R

[wewoy_romero]

nagpark ako kagabi sa office ng mom ko. yung parking slot na ginamit ko facing the street infront of the building mismo at inclined siya. i parked with the tail facing the building and the front facing the street. used the emergency break pero di ko na nalagyan ng "kalso" yung gulong since i can't find any rocks (or anything) to use for this purpose. ginawa ko, mahigpit pagkakahand-break ko para di gumagalaw sasakyan.

nung paalis na ako, siempre sakay muna ako. steady naman, car not moving, mahigpit pa rin handbreak. tapos nung napuno na yung car (5 passengers including me), medyo gumugulong pababa yung sasakyan.

buti na lang naapakan ko kaagad ang break at walang sasakyan sa harap. my concern is: is this something i should be worried about? pabigay na ba break ko? so far pag ginagamit ko naman pag driving, ok naman break (no squeeling sounds, short braking distance). if i'm parking on an incline and walang "kalso" na available, what do i do aside from the emergency break. yung iba kasi nilalagay sa 1st gear or reverse yung transmission. paano pag the incline is with the front lower, pag the back ang lower?

many thanks.