Author Topic: Steering ratio = steering lock  (Read 488 times)

Phathry25

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Steering ratio = steering lock
« on: January 11, 2017, 01:56:17 AM »
I always thought steering ratio was the ratio of the steering wheel to the ratio of the steering at the tires.  In WRS it works out more like a steering lock adjustment. Higher steering ratio just equals more lock.  I was hoping to be able to keep the lock of my front wheels the same but allow for more or less sensitive steering with the steering ratio adjustment.  Is this WAD?

oppolo

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Re: Steering ratio = steering lock
« Reply #1 on: January 11, 2017, 12:07:13 PM »
I just tried with formula 2000, yes you are right, it's wrong

PiBoSo

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Re: Steering ratio = steering lock
« Reply #2 on: January 12, 2017, 06:05:22 PM »
In a car with rack and pinion steering the stops are on the rack and the ratio is set changing the pinion.
Hence the wheels lock is constant and the steering wheel rotation changes instead.
It is possible to check that WRS correctly simulates the steer ratio enabling the physics debug mode. The lock is constant.

The sprintcars geometry is not correctly simulated, though.
Looks like there are multiple links on the pitman arm, while the steer box cannot be adjusted.
The sprintcars simulation will be fixed as soon as possible.
« Last Edit: January 12, 2017, 06:09:06 PM by PiBoSo »

PiBoSo

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Re: Steering ratio = steering lock
« Reply #3 on: January 12, 2017, 06:27:34 PM »
could you check please?
formula 2000 and ratio 10 - wheel rotation is 360
                             ratio 14.3 - wheel rotation is 540

Exactly. 360:10 = 36; 540:14.3 = 37.7
The wheel lock is constant.
« Last Edit: January 12, 2017, 06:29:22 PM by PiBoSo »

oppolo

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Re: Steering ratio = steering lock
« Reply #4 on: January 12, 2017, 06:35:42 PM »
In a car with rack and pinion steering the stops are on the rack and the ratio is set changing the pinion.
Hence the wheels lock is constant and the steering wheel rotation changes instead.


oh yes, sorry, you are right, thanks for explanation