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Toyota is my choice
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- Aug 2005
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September 28th, 2005 02:28 AM #31sa 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.
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September 28th, 2005 04:10 AM #32Originally Posted by oldblue
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.
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September 28th, 2005 07:37 AM #33
..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.
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Verified Tsikot Member
- Join Date
- Sep 2005
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- 9
September 28th, 2005 08:48 PM #34thank 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!!!
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September 29th, 2005 01:13 AM #35Originally Posted by miluku
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.htmLast edited by oldblue; September 29th, 2005 at 04:49 AM.
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September 29th, 2005 04:35 AM #36Originally Posted by StraightSix
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.Last edited by oldblue; September 29th, 2005 at 04:52 AM.
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September 29th, 2005 05:46 AM #37Originally Posted by pissword
Diko alam na posible palang masira ang makina pag ganito.
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September 29th, 2005 08:58 PM #38Originally Posted by oldblue
We all learn something from discussions like these, and it's much appreciated from my end.
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October 1st, 2005 03:55 PM #39Originally Posted by albert_b
Parking: Foot Break, Hand Break, Gear
Moving: Foot Break, Gear, Hand Break
Essential for passing licensure test in UAE, he he he....
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October 1st, 2005 08:36 PM #40
solve na ako sa
parking : foot brake, N, P, hand break
moving : foot brake, hand break, D or R
Maraming Salamat :)
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