Ackerman Steering – Explained
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Could you discuss the physics of oversteer and understeer? It'd be great if you could! Thanks 😀
If i had a little mechanical design background, and wanted to pursue a career in say automotive design, would a mechanical engineering degree be the best way to go? I am a drafter/designer in civil engineering. I am planing on going back to school to complete an engineering degree, and would prefer to do mechanical to civil. I love it!
I'm not sure what the best way to go is, but it's certainly one way of doing it. I've written an article on my website with a bunch more info: howdoesacarwork(dot)com -> FAQs -> Future Plans.
There are. They have slight rear input, only a few degrees. If i remember the MX6 had it, among others.
keep doing it till you need glasses
was this used before the existence of differential?
trhe thrust SSC is steerred from the rear 😉
can you tell me wat s ackermann angle and how to calculate it? does the toe out affect the ackermann angle?
There are infact some cars that steer on all four wheels.
One exempel of that is the Nissan Skyline GT-R.
It's quite odd that WRC cars are 4WD, and they don't have a center differential. New regulations simply banned those.
Bro you sound like Ross from friends haha!
Haha, I've gotten that before.
How is Ackerman's angle repaired if it is out of specification?
hey why every vehicle doesnt have 100% ackerman..??
help help help
in case of a two wheel drive when the frontaxles dont have differential or any other thing that changes speed, how does both ie left and right front tyres move at different speed.
or do they move at same speed,if so wouldnt one tire slip
Yes, one tire would slip. However it's unlikely that any relatively modern car not have a front differential, it's pretty standard.
What about race cars?, some don't have a front differential, so how do they keep the tire from slipping?
Race cars are typically rear wheel drive, and thus do not require a front differential.
All of you guys are so spun out…Ackerman is about tire wear…rolling resistance…when a car turns…it defines a sgment of a circle…THE CENTER of the circle defines the radius…as the car turns..the Tires describe four DIFFERENT radii…the tires need to be 90° to the radii to promot travtion, reduce wear…Mr Ackerman was an employee of the Conastoga wagon Company…this shit is nothing new..
Thank you for making these videos! Loved to get the F1 radiator explained, but in this one did you not skip the actual explanation of the mechanics? I mean shure wheels go around at different speeds, but how to achieve the different turning angles for the inner and outer front wheel, mechanically some might ask.
I found it at Wikipedia though:-)
Cool video… I always noticed on cars that the inside tire always seemed turned out farther than the outside tire… now it all makes sense. Keep up the good work!
A german, ofcourse 🙂 German cars will always rule the world. german engineering ftw
damn precise and upto the point
It does this in my 2005 Dodge Magnum RT
plz explain anti ackermann with respect to varying slip angles.
I like your explanations. Would really like to see one on Bump Steer. Perhaps sometime you could do one on that subject!
Hi @Engineering Explained , I notice that front wheel axes cross at the center of the circle of the curve, that means they are not parallel. I mean, not only do they spin at different angular speed, but also they steer at different angles. Is it really that way?
Thanks very much for your time, I recently started to watch your videos and you are the best at explaining, it's all very clear, interesting and useful. Thanks a lot.
No idea what all this is about – Ackerman steering and differential gearing were around long before the motor car. Horse drawn carriages had wheels that revolved independently of each other so scrubbing wasn't a problem. The reason Erasmus Darwin came up with the idea of Ackerman steering was because on one of his medical calls his carriage overturned and he suffered a broken leg. He was sitting outside of the triangle subtended by the front axle's central pivot and the rear wheel hubs when the axle turned through 90 degrees, his portly stature caused the carriage to fall over. Introducing kingpins and four point location (as opposed to three) made for stability. This is why this arrangement is used on motor cars. Differential gearing is used to solve the problem of wheels revolving at different speeds when cornering.
Are front wheels parralel when steering? They dont seem so in picture. If not, how is this difference acheived?
how does the change in angle of wheel reduces its angular velocity
is there any relation ?
Thanks a lot, great video
thanks
It says on the top of the whiteboard: Ackerman steering prevents tires from slipping – that is nonsense.
please upload a video on anti-ackerman stating its geometry.
Thank You so much for putting up this video. It really helped! 🙂
Great video
How can we find Ackerman percentage?
I'd like to thanks you alot, you learned me more in 3 minutes, than my tearcher in 4 hours.
i think angular velocity would remain constant. the only thing thats changing is the linear velocity
It has been shown in the video that all the wheels turn for a common center.
So, the angular velocities of all the wheels will be the same.
Their linear velocities would be varying. ( as the radius from the center varies)
The descending order discussed might be true for linear velocities, but not for angular velocities.
is Ackerman steering a condition or a system?
Thanks God i have bike 🙂
that was awesome..thank u somuch
I'm a Belieber too.
okay, my question to anyone here: does the most tight turning circle of a car change if it's going at different speeds, aka if the steering wheel is at full lock can you turn sharper at certain speeds, what about reverse vs forward? is it always the same?
supper explanation
AckermanN*
Great explanation tho 🙂
TWalla here: Your videos are awesome.
what is meaning of percentage akerman ??
Thanks a lot!!, really interesting…:)
Great explanation! i think ive watch 80% of you videos in 24 hrs lol
Cheers for your videos mate
Vintage EE right here.
are the left and right front tires each at a different angle ?
if you turn the steering wheel than the angle of both tires is the same no? but only their speed differs in a corner
+engineeringexplained: if front is moving faster than rear than how can ang. velocity intermix them as 1,2,3,4 ? This implies that right moves faster than left which is correct. If Front moved faster than back should it be 1,3,2,4?
thanks brother
great
4wd and awd is something different? o.O
as far as controlling ackermann and bump steer does a rack and pinion setup or a bellcrank setup offer better control and handling?
It's important to note that the condition illustrated in his drawing is ONLY valid for low-speed cornering, ie. where there is no slip angle at any of the tires. When this is the case, the instantaneous center of rotation of the chassis will be about a point that lies on a line that is colinear with the rear axle. As the velocity increases, and slip angles develop, that point of rotation will move forward, as the car develops a side slip angle (beta). At some velocity (known as the tangent velocity) the front and rear wheels will describe the same radius. Find an empty parking lot and drive at a constant radius at a very low speed. You should notice that the car corners with a 'nose out' attitude. As you increase the velocity (and therefore the yaw rate) you will notice that the car begins to 'nose in' as the car develops side slip angle, and finally has a tail-out attitude. Again, the condition described in the video is only valid for low speed maneuvering (as if you were pulling into a parking space).
thank you very much for all these great vids!!! anytime I question something in the mechanics of , or I need a definition explained in visual I come here. Everytime. thank you. thank you. keep it up!
Hey jason!
Can you make a video on Front Steer vs Rear steer,
what should be the Ackerman percentage for off-road cars?
Hello. Can you please make one video about car steering ratio ? I'm interested how i can count car interior steering wheel degrees and wheels turn degrees.
The kid is good!
tanx
it help in my exam
So… good or bad for drifting? If it can be considered one or the other.
nice video.. but i just hate the way to create chapping sound every time u start a new sentence..
besides the video was helpful
AYEEEEEEE
Nice!
mikasa ackerman 🙂
Best explanation☺
plez make video on recirculating ball steering system
How can we find the distance between point 3 and the point at the horizontal from the main intersection point.
I am watching all your videos. and i make a short notes from your
lessons.
i think the first ford cars had only an one wheel drive setup and i can see now why. b*)
u a genius bro. and I'd know
Best explanation, can you please drive these equations?
Mikasa ackerman.
90% of the vehicles I see still have the outside tire plowing in a full turn. Trucks cars van buses doesn’t matter. No vehicle truly has a accurate steering system
Been watching your videos forever.. looked up ankermenn and noticed… i never subbed.. well thats fixed xD
Hahahahaha fame at last!
Great work.
Hi, could you give me an idea of whats happening to my vehicle. I have done wheel alignments to my car several times however i still get understeer.. It is a constant 4wd car, manual with transfer case. CV's are good.
Why are you wearing a helmet during the explanation?
Awesome!
Question: Why do sports cars have terrible turning radiuses (Raidia?) ? Is it only because of the handling? That you want a stiffer, more stable, suspension?
wow I'm watching him in 2018, he aged quite fast in 6 years ! 🙂
Good video, but not as good as your current videos. You've refined your craft. It's spelled Ackermann with two Ns. Invented by builder Georg Lankensperger in Munich in 1817. You can see this easily in many Lego vehicles, where the steering mechanism forms a trapezoid rather than a parallelogram.
superb explanation, thanks.
Thank your for the explanation! Very clear and easy.
Great work, Sir!
Its now obsolete
Can anyone explain, if he says front wheels move faster than rear wheels as you turn, shouldnt it be 1 and 2 at front wheels in terms of velocity?
i see Ackerman I click and watch
Thank you!! I did not know this!
this one is too blurry also'''''''''''''''too bad
Is Ackerman steering system used in only 4 wheel drive?
Good to revive a old topic but thanks for your video now I understand how AMG 4matics are good for nurburgring but sucks at low speed turns. Can you explain a bit more on its negative effect for example causing Tyre crabbing or juddering at low speed turns in cold weather? Merc owners are so angry about their expensive car making embarrassing turning noise around town.
Wow, simplemente me fascino la manera en la cual lo explicaste, un buen like para ti buen hombre