What are these formulas? Here's the explanation:
1 Calculate engine power
Unlike the previous post, the following formula is a simplification of the previous formula. The formula is:
HP = work / time
HP = (m / t) * 1.241
HP = Horse power
m = total mass of the vehicle, the unit kg
t = the time required to accelerate 0-100kpj, units of seconds
1.241 = constant
Why the formula is so simple? Actually that is complicated is determining the constants 1.241, due to a decrease of the conversion formulas and units, also assumed the vehicle had little rolling resistance.
Achievement of successful change in the measured engine speed is increased. If we want our vehicle reaches a certain speed would have to be supported by the addition of engine power, but how the benchmark change in engine power is sufficient to achieve a speed that we want?
The procedure, calculate the maximum power our vehicles (can be a way to use the formula above), and then calculate the maximum speed that can be achieved of our vehicles. Next enter into the following formula:
HP2 = HP1 * (V2 / V1) ^ 3
HP2 = Horsepower required, the unit dk
HP1 = horsepower standard, the units dk
V2 = the desired maximum speed, the unit km / h
V1 = maximum speed standard, the units km / h
The following formula is useful so that the engine is not forced to over-rev the engine condition is not "forced" being held in a certain gear when the speed was not able to ride again.
The formula is:
V = (60 * n * D * rpm) / (1000 * i)
V = maximum velocity calculated on the teeth, the unit km / h
n = number of cylinders
rpm = engine speed at maximum torque, the information contained in the brochure
D = overall diameter tires, the unit cm
i = gear ratio (the ratio of primary, secondary ratio, the ratio of each tooth)
It is common knowledge if the motor is original speedometer recalibration experience and exceeded a few percent, solely for the rider's own security. But if you are curious about the real speed of your car, can be calculated using the following formula
V = S / t * 3.6
V = velocity, the units of km / h
S = distance traveled, units meters
t = time, units of seconds
Test procedures, run the vehicle with the speed as constant as possible at a certain speed, for example 40km / h. At a certain distance, calculate the time required for the distance menempun, for example, to reach a distance of 50 m takes 5 seconds. Calculate using the formula above, then compute large deviation with the one shown on the speedometer
Deviation = (V2 / V1) * 100%
V2 = real speed measured using the formula
V1 = speed shown on the speedometer
Calculate or predict the braking distance at a certain speed, it can prevent you from inconsiderate and avoid fatal accidents. How to calculate the braking distance can be simulated using the following formula:
JP = (V2 / V1) ^ 2 * S
JP = braking distance, units meters
V2 = Velocity want to know the braking distance, the units of km / h
V1 = low speed during the test, the unit km / h
S = braking distance during the test, the units meters
braking distance is not only directly proportional to the speed but quadratic, In a 2-fold speed it takes 4 times the braking distance.
