How much steering lock is "enough"

[gidge348]

I have been reading though these illustrious pages for a while and have seen a lot of different takes on this question.

“How many degrees of wheel movement is enough”

I have seen a lot of mentions of 3 degrees each way, 5 degrees each way etc, these seem quite small? Previous racing was on speedway where 90 degrees is not enough sometimes

I would be interested in opinions for a 210 inch wheel base streamliner.

Obviously the more the better, particularly when things get ugly, but more lock needs more room and things a pretty tight at the moment.

Any suggestions?

[willieworld]

the rule is 15 degrees left and 15 degrees right maximum---you will need all of that to get around the pits --next month at el mirage i will measure how many degrees it actually takes to make a run and to get off of the track and post it on this thread  willie buchta

[Stan Back]

It's a car, willie.

[willieworld]

my bike is a sidecar same principles apply as a car except the 15 degree rule                willie buchta

[tomsmith]

Turn steering until it hits the stops, then apply full throttle.  This will work for both bikes and cars.  You will be surprised and pleased how little space it takes to make a turn, especially if you are on a slick surface.  Nearby spectators will also be impressed.

[hitz]

Gidge,

My lakester turns 7 deg. in and 7 deg. out. It has 188" wheel base and 1.5" ground clearance and I tow it around on the salt with a dolly that has wagon type steering. This setup raises the front wheels up about 7 inch's, turns tight and helps to get it on the trailer with out dragging.

harvey

[gidge348]

Gidge,

My lakester turns 7 deg. in and 7 deg. out. It has 188" wheel base and 1.5" ground clearance and I tow it around on the salt with a dolly that has wagon type steering. This setup raises the front wheels up about 7 inch's, turns tight and helps to get it on the trailer with out dragging.

harvey

Hi Harvey,

Thanks for that, have you ever come close to full lock when you are on a run?

[SPARKY]

My experience has been "WHEN"   I needed that much  it didnt respond to the earlier little ones  Yes I have a "SPIN PIN"

[gidge348]

Thanks for that Harvey, I thought that may be the case.

I just wanted to make sure that I didn't run out of steering before I ran out of .....options, track and ability

[johnneilson]

the rule is 15 degrees left and 15 degrees right maximum---you will need all of that to get around the pits --next month at el mirage i will measure how many degrees it actually takes to make a run and to get off of the track and post it on this thread  willie buchta

OK, I admit I am slow at times. I cannot find any mention of this in the '10 rulebook, so, either I am missing a whole section or it is no longer specified?
I am laying out the steering and have worked up ackerman to give 14.7° on outside wheel and 15.9° on the inside.

Thoughts, comments?

Thanks, John

[dw230]

Willie's response was referring to motorcycles. You can set up your steering to your preference. You will need to clear the course and want to move the car in the pits and shop.

DW

[John Burk]

At 200 mph , using the formula for centrifugal force , the most the front wheels can turn without sliding is about 1/10 deg . 6 deg or whatever is for in the pits .

[jl222]

At 200 mph , using the formula for centrifugal force , the most the front wheels can turn without sliding is about 1/10 deg . 6 deg or whatever is for in the pits .

  How do race cars go around corners or make rapid lane changes if that was the case, and how much slip angle of tire-vertical load-coefficient of friction of tire are in formula?

[John Burk]

Jl , at Bonneville the radius of a 200 mph .6 G turn is about 4500 ft . Daytona turn radius is about 1200 ft . The difference is banked turns and more traction .

[jl222]

Jl , at Bonneville the radius of a 200 mph .6 G turn is about 4500 ft . Daytona turn radius is about 1200 ft . The difference is banked turns and more traction .

  John are you talking about centrifugal force in cornering?