Go Back   Team-BHP > Under the Hood > Technical Stuff


Reply
 
Thread Tools Search this Thread
Old 14th May 2008, 01:26   #1
BHPian
 
srijit's Avatar
 
Join Date: Jan 2008
Location: Trivandrum
Posts: 594
Thanked: 6 Times
Default Video: See what difference 5km/hr makes. Please watch.



Not practical, but interesting, nevertheless.
srijit is offline   Reply With Quote
Old 14th May 2008, 01:45   #2
BHPian
 
PhrozenFire's Avatar
 
Join Date: Apr 2008
Location: Bangalore
Posts: 267
Thanked: 4 Times
Default

Like you said - interesting. Point to be noted is, the distance of the truck from the point of braking. Had the truck been 5-10 feet further away, both the cars would probably have been safe. On the other hand had the truck been 10 feet closer to the point of braking, both the cars would have hit it at quite a velocity.
But yes the video does highlight just how much distance is covered after you start braking to come to a complete standstill.
PhrozenFire is offline   Reply With Quote
Old 14th May 2008, 01:47   #3
BHPian
 
CR-V's Avatar
 
Join Date: May 2008
Location: Delhi
Posts: 184
Thanked: 14 Times
Default

So is this real? does it really makes so much diffrenece? and if it does what would be the difference if the cars were traveling at 65 and 70?
CR-V is offline   Reply With Quote
Old 14th May 2008, 03:08   #4
BHPian
 
srijit's Avatar
 
Join Date: Jan 2008
Location: Trivandrum
Posts: 594
Thanked: 6 Times
Default

Quote:
Originally Posted by CR-V View Post
So is this real?
No reason to suspect otherwise. All they are saying is that 5km/hr might not sound like a lot, but it make a big difference.

ps: In the videoe, you can see the tyres stop and release. Is that the ABS?
srijit is offline   Reply With Quote
Old 14th May 2008, 09:35   #5
BHPian
 
mezereo's Avatar
 
Join Date: Jul 2007
Location: Hyderabad
Posts: 125
Thanked: 3 Times
Default

interesting video. 5 kmph does make a difference ha
mezereo is offline   Reply With Quote
Old 14th May 2008, 13:39   #6
jat
BHPian
 
Join Date: Dec 2005
Location: SINGAPORE
Posts: 265
Thanked: 3 Times
Default

for people who are mathematically inclined:

The KE is proportioanal to square of the speed. Which means the differenc is square of (65/60) = 17.36% and same with square of 70/60 = 36% (doubling the difference increase the risk and damage factor by more than double)
jat is offline   Reply With Quote
Old 14th May 2008, 13:58   #7
Senior - BHPian
 
Join Date: Jun 2007
Location: PNQ-HKG-SZX
Posts: 1,238
Thanked: 18 Times
Default

The breaking distance always depends on the speed which is quite obvious as there is significant amount of buffering space and stability in being slower than being faster, be it 20KM/hr or 5KM/hr
VJ_MAVRICK is offline   Reply With Quote
Old 14th May 2008, 14:13   #8
BHPian
 
sbasak's Avatar
 
Join Date: Nov 2005
Location: CCU-LTN
Posts: 607
Thanked: 8 Times
Default

The truck could have pulled out earlier - in that case even lower speed would have caused accident!

Speed alone doesn't kill. It's the inappropriate speed and the circumstances which make accidents fatal.
sbasak is offline   Reply With Quote
Old 14th May 2008, 14:17   #9
BANNED
 
Join Date: Jun 2007
Location: Bengalooru
Posts: 1,471
Thanked: 7 Times
Default

. Also the car with higher speed has the option of swerving towards right and avoiding the truck.
Quote:
Originally Posted by sbasak View Post
The truck could have pulled out earlier - in that case even lower speed would have caused accident!
diabloo is offline   Reply With Quote
Old 14th May 2008, 14:19   #10
BHPian
 
viper_711's Avatar
 
Join Date: Jan 2008
Location: Bangalore
Posts: 346
Thanked: 55 Times
Default

The braking distances provided in OD and ACI (as a part of the car specs in the buyer guide)show the same trend - the difference from 80kmph-0 and that of 100kmph-0 is almost 70-80% more for most cars.
viper_711 is offline   Reply With Quote
Old 14th May 2008, 14:22   #11
Senior - BHPian
 
Shan2nu's Avatar
 
Join Date: Feb 2004
Location: Hubli - Karnata
Posts: 5,525
Thanked: 87 Times
Default

When testing braking, time required is not as significant as distance required to come to a halt.

If you compare a truck that goes from 100-0 in 10 secs against the Veyron which goes from 405-0 in 10 secs, even though both vehicles take the same amount of time to stop, the Veyron will travel a much larger distance in those 10 secs.

Moreover, if both drivers have a reaction time of 0.5 secs. It equals to 13.88mtrs for the truck and 56.25mtrs for the Veyron (Veyron is travelling an extra 42.37mtrs even before they start braking).

Shan2nu

Last edited by Shan2nu : 14th May 2008 at 14:24.
Shan2nu is offline   Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
German Engineering Excellence, watch video. fazalaliadil Shifting gears 16 21st April 2014 10:50
Before you give your car to a Tuner, watch this VIDEO 1self Modifications & Accessories 6 22nd December 2012 09:20
Damn, a good install makes a difference!! My OHC Vtec ICED again GTO In-Car Entertainment 60 17th July 2008 12:39
Gravity Warrriors Launches New Video! Recommended Watch! m1g Motorbikes 0 25th December 2007 18:48


All times are GMT +5.5. The time now is 12:59.

Copyright ©2000 - 2017, Team-BHP.com
Proudly powered by E2E Networks