Double wishbone suspension geometry | Designing | Calculation | Hard points | Camber vs wheel travel

Double wishbone is the independent type of Suspension geometry that allows each wheel to act and react independently from the others. Designing of double wishbone geometry involves various assumptions and approximations. So, here I will be covering almost all approximations involved in designing the suspension geometry. Adjusting relative angles and length of control arms, you can design a perfect suspension geometry for your vehicle. After getting all the hard points from 2d sketches, put the coordinates of these hard-points in suspension software’s , to analyse the curves of different parameters and get a suitable suspension geometry .
In this video you will learn :-
1) What is Double wishbone geometry?
2) Construction, designing and calculation of Double wishbone geometry?
3) Effect of Control arms on handling characteristics of vehicle.
4) Study of Camber versus wheel travel Curves
Follow me on Instagram :- / thevatsaljain
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Check out blogs:-
www.automotorgarage.com/blog/...
Follow me on Instagram :- / thevatsaljain

[@aclark549]

This is a great video. I appreciate the breakdown on how the dimensions are determined and explaining the assumptions required. Thank you.

[@bedbudha768]

Thanks for this amazing video. Looking forward for such insightful and informative videos.

[@mohammadzain6225]

Excellent video.....very helpful

[@simonmuncker8632]

Hello, great video. I was wondering if this procedure applies to the rear suspension, I mean, is there any change if I use this method for the rear suspension? Thank you for your time :)

[@himanshuchaudhari338]

Hello, the mounting of pushrod on UBJ or LBJ depends upon where the forces are maximum between the two. So can you please tell me that how do I get my maximum forces on UBJ intentionally so as to mount the pushrod on UBJ?? P.S- Very good content as usual.

[@emina4627]

Nice! One for McPherson would be useful too. And which textbook did you use for reference?

[@anujawasthi6789]

how about designing of upper and lower control arms?

[@RajendraYadav-bh3nk]

Very helpful video..for designing double wishbone suspension geometry

[@thevatsaljain]

Glad it was helpful!

[@utkarshgupta6578]

Bro how to select camber, caster, roll angle , toe in , all these values for geometry

[@LemonMontage420]

There is a mistake on case 2. The outer tire will gain NEGATIVE camber when the body is rolled, not positive camber, and the opposite is true for the inner wheel. This makes alot of sense if you think about it, as when you're rolling, the LBJ connection on the body on the outside wheel is going out towards the wheel while the UBJ is going inwards, making the wheel have to rotate inwards towards the body (negative camber) in order to maintain the length of the suspension arms, the opposite is true of the inner wheel

[@adityalonakadi1069]

Hey amazing video, it's exactly what I was looking for! Could you further explain how can we calculate the diameter of the control arms and also explain how to calculate the geometrical dimensions of the knuckle?

[@SandeepSingh-43]

The control arm diameter is open for your preference. You have to consider material, and its properties, and the particular use. You also have to take into account the cost. .048" wall thickness would be a good start. After you engineered the part, then off to FEA analysis.

[@akhilraj3777]

How to design double wishbone suspension with single horizontal spring damper only connecting lower wishbones

[@utkarshgupta6578]

How you decides the knuckle points

[@ayoubben4721]

Thanks a lot

[@38SIDDHANTKARAMBALIM.E]

what is exactly fvsa length and how i do i find it?

[@pavangiri9435]

Sir how can I find svsa length Sir please do you help us please sir

[@priabiasa9095]

Probably I miss something, how to determine y2, y4, y5, and y6, or in other words how to find the length of upper and lower control arm?

[@shubhamkumar7100]

Great video and explanation. can you please complete the hardpoints series.

[@thevatsaljain]

Thank you . I have completed the hardpoints for front geometry . Check this out :- kzbin.info/www/bejne/iZCqo5SIh8ergsk

[@gfff503]

@@thevatsaljain sir please reply, I have lot of confusion

[@simulationspot]

Hey can you share the ppts it would be of great help

[@johnterpack3940]

There is a formula for calculating the correct upper A-arm length. I read it years ago in an engineering book, but haven't been able to find it again. You start with the lower arm, built to whatever length. The height of the lower arm above the ground, the length of the lower arm, and the height of the upper arm all go into the equation. I just can't remember what functions to use or if there is other data needed. The end result is a pair of arms that produce zero scuff while giving the necessary camber gain.

[@manojgore9235]

what was the book's name

[@johnterpack3940]

@@manojgore9235 I wish I could remember. That was 40 years ago.

[@anupgupta9572]

Roll centre kaise calculate karenge?

[@Dante-ti5ii]

0.75x video speed for no brain xploding...

[@RajendraYadav-bh3nk]

Can you make video on h arm geometry for rear suspension .. please

[@thevatsaljain]

Hello Rajendra , I am working on it. It will take time. Thanks and Stay tuned.

[@AruneshKashyap]

How to find wheel travel

[@sachinpatil4563]

Hatsoff Vatsal...You are indian Gillespie👌👌

[@thevatsaljain]

Thank you !

[@sachindethe3023]

Could you please share reference u have considered for calculation that would be useful 😊

[@thevatsaljain]

The formulas and calculations were from Milliken vehicle dynamics

[@RajendraYadav-bh3nk]

Please provide h arm geometry videos soon...as I am currently working on that..and I need some help

[@thevatsaljain]

Hello Rajendra , I am working on it. It will take time. Thanks and Stay tuned.

[@nirmalparmar4224]

How to determine roll cente of trailing arm suspension?

[@theyellow8834]

Get the 1st axis multiplied by the 3rd significant figure and minus the velocity of travel which is around 89 degrees, get the x axis and calculate the Pythagoras tie rod to find the average swing.

[@habibrehman2195]

How to draw the 3D geometry in solidworks?

[@thevatsaljain]

For making 3D geometry in Solidworks, you can use option of 3D sketch from sketch toolbar.

[@joelgreen1475]

If am not using a 3D software, how do I determine the center of gravity?

[@thevatsaljain]

This can be useful :- kzbin.info/www/bejne/bZ_Qiox4mc2Clc0

[@mrrandom6913]

Great video. Can you recommend a book please?

[@thevatsaljain]

Race car vehicle dynamics Book by William F. Milliken Jr.

[@Dante-ti5ii]

Hello, can you put the text you are saying in the video as a kind of subtitles? For non english people can be hard to understand. Thank you.

[@086_rajatpatil5]

I this video I dint get this to the point , for the wheel travel during the bump of 8inches and during droop if its 4 inches than how come wheel travel will be 12 inches ? Plz explain

[@fhonethone]

Maybe a bit to late, but wheel travel = bump + droop = 8 + 4 = 12 inches

[@sachinpatil4563]

This condition unladen to bump= 8 Unladen to Droop(rebound) =4 Total travel 12 inch This is the wheel travel for SUV

[@086_rajatpatil5]

How to calculate wheel travel ?

[@cr7savage709]

Did you figure it out ?

[@MrPrime-mt8dd]

bro nice content but stop talking like a robot, the continuous up and down pitch in your voice is really irritating. i know you're speaking like this so that easier for other's to understand but nah bro

[@user-rt3lb9oq6x]

Buddy, in English we don't pronounce letter R. Improve your awful pronunciation.