- #1
ajwillenbrook
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Hey
I have a assignment to produce a excel work book to calculate acceleration time and top speeds for different gear ratios in race cars. I have so far work out time to accelerate to top speed, but I want to add a bit more detail to my graphs by showing the speed loss during gear changes.
car mass - 600kg
drag coefficient - 1.3
density air - 1.225kg/m^3
frontal area - 0.4m^2
rolling resistance = 125N
shift time - 0.5 seconds
I can work out the momentum and drag forces at the point the clutch is pressed at the start of the gear change using
momentum = mass * velocity
= 600v
drag force = (0.5 * coefficient drag * density air * frontal area * velocity^2)+ rolling resistance
= 125+0.3185v^2
Sure it can be work out using calculus but has been many years since I last did that.
Any help would be greatly appreciated
Thanks Andy
I have a assignment to produce a excel work book to calculate acceleration time and top speeds for different gear ratios in race cars. I have so far work out time to accelerate to top speed, but I want to add a bit more detail to my graphs by showing the speed loss during gear changes.
car mass - 600kg
drag coefficient - 1.3
density air - 1.225kg/m^3
frontal area - 0.4m^2
rolling resistance = 125N
shift time - 0.5 seconds
I can work out the momentum and drag forces at the point the clutch is pressed at the start of the gear change using
momentum = mass * velocity
= 600v
drag force = (0.5 * coefficient drag * density air * frontal area * velocity^2)+ rolling resistance
= 125+0.3185v^2
Sure it can be work out using calculus but has been many years since I last did that.
Any help would be greatly appreciated
Thanks Andy