Hii, I am designing a rack and pinion steering system .I have strucked in finding 1)rack displacement,2)tie rod length. The inputs that I have inner and outter wheel lock angles,turning radius,lock to lock turns,steering ratio. If I get rack displacement,I can get steering arm length.so how to find rack displacement. And I don't have any info about pinion and rack. How to proceed to design rack and pinion?