## CAR'S ACELERATION VALUES

## CAR'S ACELERATION VALUES

(OP)

Hi all , could you tell me what are the most common acelerations values on a car .

I'm interested on the aceleration when draging , from a street car to a 1/4 mile drag cars.

I'm interested on the aceleration when draging , from a street car to a 1/4 mile drag cars.

Pardal

## RE: CAR'S ACELERATION VALUES

But hot-rodders didn't always know the physical laws, and now funnies and top fuelers run well over 300 mph and ~4.5 sec. So *you* figure out the g force and COF!

## RE: CAR'S ACELERATION VALUES

Kevin

## RE: CAR'S ACELERATION VALUES

The ADXL202 of analog-devices (+2g/-2g range) can do the job?

## RE: CAR'S ACELERATION VALUES

Kevin

## RE: CAR'S ACELERATION VALUES

The problem is that the vehicle pitches as it accelerates, so you measure the pitch angle as part of your acceleration.

Cheers

Greg Locock

## RE: CAR'S ACELERATION VALUES

some folks claim good results and swear by the hot rod toy GForce gizmo.

## RE: CAR'S ACELERATION VALUES

Cheers

Greg Locock

## RE: CAR'S ACELERATION VALUES

As already stated rolling resistance, aerodynamic drag etc etc all play a part in this game & to give approx acceleration rates of different vehicles is best worked out yourself. This is a threotical evaluation & can be used for compairing different vehicles.

To find your acceleration rates:

Firstly work on losing 15% power due to drive train losses etc etc. This gives us 0.85% efficiency factor.

Now to find the acceleration rates we need Flywheel torque in lbs/ft,Drive wheel torque lbs/ft & Wheelthrust in lbs.

Drive wheel torque= Flwheel torque x gear ratio x diff ratio x 0.85

Wheel thrust= Drive wheel torque/ rolling radius of tyre in feet, measure in inches & convert to feet. multiply inches by 12 to get figure.

Acceleration force in g's= Wheel thrust/ weight

1 g= 32.174 feetper sec per sec

you can work out the feet per sec by multiplying 32.174 x the g,s worked out.

## RE: CAR'S ACELERATION VALUES

Thrust = power/velocity

Thrust = (rwhp/velocity)*375

Where:

rwhp = rear wheel horspower

Velocity is in miles/hr

375 = finagle factor to beat the English sytem of units into giving us an answer.

## RE: CAR'S ACELERATION VALUES

Can you give me some examples of acceleration forces in g's using your calculations.