Drag Coefficient

[spg]

Hi

 

Been mooching around the net and stumbled across this.

 

http://land.heim.at/pampa/252319/tmt/gsf_d...ml#Introduction

 

Basically you record how fast the engine revs up, Enter car details weight, wheel size etc. The software then listen to the recording and works out the dyno chart for you.

 

One of the inputs is the Drag Coefficient anyone have a clue on the 2b without windscreen what it would be.

 

Cheers Steve

[tendoshingan]

I thought the drag coefficient of a 7 type sports car is the same as a house brick????

and with a windscreen is like a housebrick with some cement on the end

[spg]

Ok then

 

Anyone know the drag coefficient of a house brick (No Cement) :D

[philshelton]

about 1/6th of a building block given that 1 block equals 6 bricks :rofl:

[spg]

Found it here

 

http://en.wikipedia.org/wiki/Automobile_dr...es_and_examples

 

0.7 about the same as a F1 car.

 

A bricks about 2.1 did'nt say if it had cement or not

 

Cheers

 

Steve

[Guest subaru]

cheers guys i found the info on the drag on a hood interesting. I think 0.7 is over double of the sierra which was around 0.32 in standard form. That was class leading i think until the Audi 100 came out with 0.30, those cars didn't need 170 bhp to do 115mph unlike my hood. lol

chris

[Guest subaru]

o yea stupid me read the wikepedia list chris. 0.34 for the sierra

[Guest SEgan]

0.7

 

A Caterham is much narrower than my 2B !!!!!!!!!!

[tendoshingan]

A bricks about 2.1 did'nt say if it had cement or not

 

but doesn't it depend on how you shape the brick????

[Grim]

0.7

 

A Caterham is much narrower than my 2B !!!!!!!!!!

 

Coefficient of drag is independant of frontal area, so a robin hood with coefficient of drag of 0.7 would have a large drag force than a caterham with coefficient of drag of 0.7.

[Guest woolly]

but doesn't it depend on how you shape the brick????

 

 

the cement may improve it.

 

the first hood to be seen with tufts of wool all over the body work to find the drag areas

[Longboarder]

Always amused me that a Lambo Countach had the same CD as an early aircooled VW transporter.

 

Nigel

[tendoshingan]

Could always try hitting dents into all the paneling with a good round hammer, creating a golf ball look.

It's what makes them travel faster