Vehicle Weight Transfer and Load Transfer

[@filipnorheim6456]

as an Mr2 owner, I really needed to see this.

[@francoisfigeac4942]

Thank you. I have asked a few people and they looked at me like I was crazy. I was thinking about something and couldn't get out of my head. Your explanation did it. Thank you.

[@h.mushmann2351]

I finally realize why and how to explain different mass distributions other than 50/50 are preferred. This video, load transfer. 50/50 mass distribution is optimal in constant angular velocity and constant speed cornering situations. Around any given road course (not oval), a chassis spends the least amount of time at constant speed and angular velocity while cornering. The chassis shaves most of its time existing corners and corner groups on to straights. Therefore, optimal cg control while unbalanced load transfer occurs exiting corners (accelerating) is preferred over constant angular velocity and constant speed cornering situations. Long sentence I know. The conclusion, optimal cg location is dependent on given track layout. Of course math can be applied to calculate a cg specific to the amount of time spent in whichever transient loading situation best suited for each specific track.

[@Pyinator]

Can you do a more in-depth video about wheelbase and width? You kinda touch on it here and I think it is often overlooked. Great video as always, BTW!

[@axelabathsilvaespino2101]

it's amazing how easy i understand this stuff. You really made a good job explaining everything.

[@skylancer-zer0205]

I learned a little lesson of my own today about load and weight transfer. Let's just say that hitting the brakes on a wet corner with sharp crest in the middle isn't a good idea :P RIP Murphy the POS Mercury Tracer 1999-2016

[@simpilot001]

RIP Murphy

[@Schmukai]

Hey man, love your videos! Can you make a short explanation video about break squeal and different solutions? I've always wondered what causes this and what we can do about it.

[@sentinelcheese3420]

Nice video Jason. You actually helped me understand the basics of momentum equations for my finals. Lol. Also, I was wondering when are you going to upload videos of your Integra. It's been quite a while now.

[@machwebb]

I love your channel, but you do crack me up...."okay so let's do some simple math.... " Thanks again for brilliant videos..

[@SavetheBytes]

mach webb In terms of statics and dynamics, this was indeed some simple math; basic x and y forces, creating an nice system of equations.

[@machwebb]

I'm sure in the scale of things yes it is (smarty pants) ;) it just sounded funny to me.

[@lesher27]

mach webb This is supposed to be intro (200 lvl) level for engineering majors.. Now you know why we claim it's a hard major.

[@bootyman234]

Yeah, like his saying "creating AN nice system of equations" lol

[@e16boii]

Awesome video! Really like seeing how to derive the formulas

[@jasonl5589]

I'm kinda jealous of you because i never get to use any of these concepts that i learned from physics classes to real life application. i would really love to do that like you especially with cars. That would be so fun do teach, learn..etc

[@shbhmrwt]

Would you please do a video on gyroscopic effect on a vehicle?

[@chinpingshoon]

tq... now that i have learnt about load transfer in a vehicle.

[@fajriwahidin6371]

Great video sir, may i ask why is the direction of the braking force is to the left direction?

[@immanuelj8952]

Because the left side is the front of the car.

[@fajriwahidin6371]

@@immanuelj8952 alright, thank you sir.

[@mworx6446]

Track width makes a big difference to control weight transfer and slip angles to rear drive cars

[@d3x-dt3]

Were did you gain all your knowledge? It is very insightful explanations!!

[@mcspikesky]

Tarek Hill Physics bro

[@jasonl.5973]

best explanation ever~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

[@iqbalfaishal4071]

love your channel man, you explained it very well

[@agrozema54]

Have you explained how a cvt transmission works?

[@EngineeringExplained]

Chris Alfonso You can always search on my channel. :) kzbin.info/www/bejne/iYKvln6aj7x6f5Y

[@00Buki]

Can you do a video explaining why 50-50 weight distribution is ideal (in terms of mathematics) ?

[@EngineeringExplained]

Stefan Bukorovic Haha, made one just a couple weeks ago! kzbin.info/www/bejne/rHvLmYiHabSjgqM

[@00Buki]

Oh thanks :)

[@denamuf]

So you're telling me to lower my car

[@anikethazra1416]

babu aap thode se aryaman jaise lag rhe ho......muaaahhh

[@sivaganesh3102]

1.What is that 1 g braking force....? And 2.what determines " 1 g braking force "? 3.if braking g force is greater or lesser then one then what are the changes that takes place in the derivation. "Eagerly Waiting for Answer "

[@Unb3arablePain]

TL;DW Load transfer can be decreased by lowing the center of gravity of the vehicle and/or lengthening the wheel base of the vehicle. Why? Because physics and math.

[@Unb3arablePain]

nunayafb I actually watched it, I'm TL;DW it for others.

[@Avrelivs_Gold]

load transfer 10% if 50% lower CG and 25% longer wheelbase

[@ivanwong5841]

Question: Why is the 1g of braking force acting on the CG in the leftward direction? If you are braking, shouldn't there be an acceleration force acting on the CG towards the right?

[@nicholascamatti3162]

I was thinking why isn't the bracking force acting on the front wheel (assuming only front brakes)?

[@kierandennington6310]

Hey Mr EE, Great video as always. Just a quick query, where do you get your information from? What are your sources? I'd really like to further reading in the subject. Keep up the great work!!!!

[@EngineeringExplained]

Kieran Dennington I wish there was a better answer than the internet and books, but that's the reality haha. I often start with a google search, and find myself somewhere buried in journal entries or books related to the material. Lots of information out there, but not well organized.

[@kierandennington6310]

Engineering Explained Aha, righty o' chap. Cheers for the reply, I'll take a gander.

[@Genesislights]

How does the sum of the moment under the CG = 0? is this the theoretical roll axis due the suspension geometry? Great video BTW. Thanks

[@pascalmpower7944]

I found weight transfer is similar to load transfer, when you're moving around, the weight of those movable parts are going to move as well. I think weight distribution is a better word to describe "weight transfer". Anyway, best way to measure "load transfer" is to do it by transferring potential energy to kinetic energy. Potential energy is the energy produced from the car by rolling and pitching during corner and braking. Convert that into kinetic energy then you'll find out how much forces applied in the opposite direction.

[@BeReady726]

do you have a video showing acceleration times on a car with stiff suspension vs soft?

[@mycurse67]

Do you have any info on moveable ballasts used in race cars? I can only find some articles that state older F1 and DTM cars used these but nothing as to how they actually worked.

[@Tailz90]

you should make a book

[@danielstojanovski7869]

More videos like this!

[@RahulKumar23004]

Could someone please help me out here: What exactly would you consider the moment of the braking force at the center of mass (Wc) to be? As in, what exactly causes that moment?

[@Metalwrath2]

In the first example of how to decrease load transfer, how would first calculation change it we were braking under 2g?

[@WolfJustWolf]

is c measured from the cg to the height of the centre of the wheels , or to the ground ?

[@EngineeringExplained]

Wolf To the ground. Perhaps could have illustrated better.

[@amittotagi2603]

Given infinite road grip and brake clamping force, will the front axle load go beyond the total weight of the vehicle under some really heavy braking in a practical case?

[@kumarsukrit6962]

Hey Jason, wanna ask that you're considering the C.G. height from the pitch axis of the car, isn't it?

[@kayalarasan7694]

Hi there, If the Braking G changes where we need to alter the formula to calculate the load transfer ?

[@cscsw]

should "c" be measured from the ground instead of center of wheels?

[@dnelson8]

Could you talk about pick-up trucks and the lack of load? In other words, young male drivers who jack up their pick-up, have no weight in the bed and then they drive it like their mother drives her Expedition, like a maniac. You cannot drive an empty pick-up like a car. How no weight in the bed changes the braking characteristics of the pick-up especially jacked up.

[@srivathsans9528]

I see that there is no g or W involved in the load transfer calculation. Does that mean that no matter how hard i brake the load transfer is gonna remain the same??

[@Backyardsmash]

You always remind me how bad I am in math.

[@ptriq]

For some reason I think, if I re watch the video a couple times. I would get it.

[@A_backyard_cricketer]

how can we calculate what will be the minimum radius of turn at a particular speed.

[@waynerhea6649]

so basically for a better handling car you want a long low light car with very sticky tires and a wide track

[@nathancleaver2417]

Is there anyway to get some help on calculations? I can provide all the numbers needed? I am looking to calculate the weight transfer percentage for a circle track left hand corner, I have the G forces recorded as well. thank you

[@snackinglots]

That didn't explain engineering, that was why engineering needs explained! How about some examples that are understandable. What about lowering a normal car by an inch, or how bad it would be to raise it because the driveway is hard to get into. Wouldn't .25m be more like difference of the CG of a truck vs the CG of a car than just different cars?

[@niamh2839]

so, if A is smaller than C you get a negative Y load value?

[@MajdSindi96]

"Quick Derivations"

[@MajdSindi96]

@@AzathothsAlarmClock please don't judge me. That comment was posted 5 years ago. I have since finished highschool and finished a bachelor of science in geophysics. I now realise that this is not that complicated. but thanks for bringing this comment up.

[@xaby641]

Hi, I've got a question, in the sum of vertical forces the weight (W) is pointing down but in the sum moments is pointing to the left, is that possible?I mean I understand why are pointing that way, but mathematically, shouldn't be the weight pointing in the same direction in both sums?? It's like the sum of vertical forces was calculated in a different scenario than the sum moments Thanks!....sorry for my english and if it's a stupid question

[@olbena1]

Are you assuming that the weight distribution of the car is 50/50?

[@EngineeringExplained]

olivier benchetrit I'm assuming it's where I placed the location of the center of gravity, which in this case is the center, making it 50/50. So yes but you could alter it as needed and the equations will work.

[@LB83.]

Hi I have a question I drive a mk4focus st estate it’s lowered 30 mm front and back at higher speed like 120 kph my car is verry nervous around the track like it has longitudinal weight transfer going left or right at speed and accel I ordered kw v3 hoping I can tune it out should I increase bump and rebound at the rear or not ?I got a slightly wider tire at the back driving on pilot sport 4s tires car weight is about 1580 kg weight distribution is 58 I think not sure

[@gberbenkov]

From where do you get the "1" in the 4th equation ?

[@bhuvikutty3255]

Is it possible to lower the CG in a vehicle

[@jonashaidar1610]

But that would mean if center of mass is 0cm, and i brake with 5g the front would have 250% load? I mean the sum of front + rear load can be 100%max

[@anjalpatel2394]

why is the braking force in forward direction? waiting for your kind reply.

[@patrikfloding7985]

The braking force would be in the other direction, acting at the wheels' contact patches. But given that this results in a 1G deceleration (for this particular example) of the entire vehicle, the resulting vertical forces on the front and rear wheels can be described as in this video (very simplified).

[@anjalpatel2394]

Thanks for the ans

[@Pedrorodrigues3986]

and now i'm going to pretend that I've understand and watch it a Townsend times to get it

[@NEV4G]

How would you achieve 0% LT? I would assume you have C of G inline with the centre line of the front and rear wheels however setting c to 0 still yields a 50% LT. Going even further and making the C of G below the centre line of the front and rear wheels, I would assume, would mean under braking the LT would be reversed meaning that LT transfer acts rearwards. If you set c to a negative figure then the LT% would be somewhere between 0 and 50 depending how far you go which also means a load transfer to the front. Is this contradictory or am I interpreting the LT incorrectly? For example is 50% LT neutral or is it still acting over the front wheel?

[@patrikfloding7985]

C is actually down to the contact patch (ground) level. Otherwise an easy solution to all load transfer issues would be to just put on bigger wheels!

[@alexandrumardare828]

What if u have 2g of braking? I am calculating with different braking forces and it always transfers the same amount of weight. In drag racing applications they are transfering the whole weight

[@simpilot001]

did you happen to figure It out?

[@wangqiaozhang4827]

Waiiit, If the car is accelerating instead of weight of the car times c (mg*c) shouldn't it be m*a*c?

[@leight9503]

Hello, could you help me with a question? If i have front and rear wheels not on the straight line (lets say we have a complex ground surface), how should i calculate CG height? Individually for each wheel(depending on "CG pos" -"wheel-to-ground contact pos" vector magnitude) or maybe i should have some average value for all wheel-to-ground contacts? image:"drive.google.com/open?id=0B9-hp2ZRXnOuXzBvZ2Y5UmpIM2M" Whanx for your time!

[@spceracing2967]

how did you calculated the %load transfer

[@EngineeringExplained]

Spce Racing If it starts at 50/50 and ends 75/25, you have 75-50=25% load transfer.

[@7150285]

more weight more traction more grip.

[@EngineeringExplained]

+7150285 Actually the opposite occurs: kzbin.info/www/bejne/oX_EY5qQg9agipo

[@7150285]

Engineering Explained well you can't be too light either, otherwise weight for traction

[@rockythekidrs7182]

I can move the car sideways now

[@043mehdi]

would be awesome if you write during videos. Not write before you even start the camera.

[@k.bellingham8335]

Way too many A, B, C's andX,Y,W"s? You lost me at A

[@kwamebradley2347]

Potato

[@frituurpan31]

Saw the math behind him and immediately clicked away.

[@simpilot001]

shame