Spoilers help consume more petrol and add drag ?
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Is it true?
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and then?
stick your hand out of the window and feel the drag... -
hmm .. the title very funny.
Help consume more petrol?
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The short answer, is yes.
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No lah... spoilers give the car wings so it can fly.... Like Red Bull for cars... Lol...
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No,spoilers give the car more down force,so make it more stable at speed[120 km/h & above],thus consume more fuel.
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think 120 kmh oso no use. i think u need go up till 200kmh to get it to be useful . 120 is like so slow , need wing for wat. any small car oso wont float
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haiz, the common misconceptions of the laymen. it is not true that u need speeds in excess of 120 km/h to generate any form of downforce. downforce or drag is calculated as:
Fdrag= 1/2(density of air)*(velocity of object)square*(cross reference area)*(coefficient of friction)
while velocity plays a significant part in increasing downforce, increasing ANY of the variables in play will give u more drag at any given speed. for example, by increasing the angle of attack of ur spoiler (assuming u have an adjustable GT wing of sorts), u effectively increase the cross reference area (area perpendicular to the direction of travel) and therefore, one is able to create the same amount of down force at a lower speed.
that is to say, if u have a spoiler which is effectively shaped to have a low coefficient of drag AND has a low cross reference area, u'd generate neglible drag even at high speeds and get around the same mileage without a spoiler.
hence, defeating the purpose of having a spoiler altogether
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Wah bro. You are so learned!Originally posted by tailslide:haiz, the common misconceptions of the laymen. it is not true that u need speeds in excess of 120 km/h to generate any form of downforce. downforce or drag is calculated as:
Fdrag= 1/2(density of air)*(velocity of object)square*(cross reference area)*(coefficient of friction)
while velocity plays a significant part in increasing downforce, increasing ANY of the variables in play will give u more drag at any given speed. for example, by increasing the angle of attack of ur spoiler (assuming u have an adjustable GT wing of sorts), u effectively increase the cross reference area (area perpendicular to the direction of travel) and therefore, one is able to create the same amount of down force at a lower speed.
that is to say, if u have a spoiler which is effectively shaped to have a low coefficient of drag AND has a low cross reference area, u'd generate neglible drag even at high speeds and get around the same mileage without a spoiler.
hence, defeating the purpose of having a spoiler altogether -
Most people have spoiler without knowing what it is for....
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isnt it a handle to make opening the boot easier?Originally posted by Praetorian111:Most people have spoiler without knowing what it is for.... 
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Originally posted by skeujin:isnt it a handle to make opening the boot easier?
i tink spoiler make it harder to open the boot.. it weigh down the boot cover a lot... -
One theory why Ayrton Senna was killed during the F1 last lap in 1994 was that there was too much downforce on his vehicle - such that the undercarriage of the vehicle touched the ground and suddenly cut out the air flowing through the bottom. Therefore the downforce was suddenly cut off - and the car veered off-course.
Watched the documentary on Youtube. Damn interesting. -
Take out spare tyre and use repair kit instead.
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go read up more man...that was not the case....it was the tyres....Originally posted by sunboy77:One theory why Ayrton Senna was killed during the F1 last lap in 1994 was that there was too much downforce on his vehicle - such that the undercarriage of the vehicle touched the ground and suddenly cut out the air flowing through the bottom. Therefore the downforce was suddenly cut off - and the car veered off-course.
Watched the documentary on Youtube. Damn interesting.