steering system torque and force

[mohab]

how we can calculate steering system force required from driver??
and what is the safe value we need for steering shaft to be safe??

thank you

[Claude Rouelle]

Steering torque? Not too much, not too little!

Come on.... Did you ever tried to Google it?

And, by the way,.. who are you?

[mohab]

thanks for replay

Yes I googled it

but I don't find helpful solution.

when tie rod is inclined on the steering arm and I don't have tire data.

after I read related chapters in R.C.V.D tune to win and some others still I don't know how I can calculate the steering effort required from driver.

and I find many topics in this forums but I don't find clear replay

sorry it's my first time in formula student competition

thanks for your interest
and sorry for my dump questions

[Claude Rouelle]

Sorry I did not read this: who are?

[Claude Rouelle]

I did type "maximum vehicle driver steering torque" and I got 16 millions results. In just 6 minutes I found 4 articles which gave the information I needed. What is the problem? Also there is already much information on this topic in this forum. I guess you need to learn to be patient and to focus.

[mohab]

thank you Mr Claude Rouelle

I am Mohab from Egypt Helwan university (steering)

[Charles Kaneb]

mohab,

How much weight can you lift with each hand? How big is your steering wheel's radius?

I remember 100 lbs (400N) of steering force per hand being excessive.

[mohab]

thank you Mr Charles Kaneb.

I need to chick my steering system

when I know caster angle, king pin inclination, scrub radius inclination of steering arm and tie rod, tire width, normal load in front axle, steering wheel diameter and steering ratio. How to calculate steering resistance to know the effort required from the driver.

thank you

[mohab]

I mean how to calculate the torque that resist tire turning

[mohab]

I need to read useful book, paper or topic

[Owen Thomas]

Step 1: Draw three (3) free-body diagrams. One of the tire contact patch - make sure to include your mechanical trail and steer axis (google these terms). One of the upright/hub assembly with tire forces acting on it. Finally, one of your steering rack.

Step 2: math (???)

Step 3: calculate steering torque and driver input (profit)

Step 4 (mandatory): stop asking these questions because we are tired of telling you to work out simple mechanics by yourself.