For my Year 12 Software Design and Development Major Assignment, i've decided to create a Rollout Calculator. Evantually i do want to use the program for my car, but before then, i have to actually build it.

In the program, i'm having a save function that saves the Car Model, Internal Ratio of the Car and the Available gears of the car.

Would any one be able to tell me what i will need to know for working out the rollout ratio and is there anything else that i need to know about working out certian Ratios?

Also if anyone has any ideas that i could use, it would be appreciated.

Thanx!!