Recent content by nb89

  1. N

    Struggling with race car set-up? Get expert advice here!

    Ah ok, so ideally you would want a spring rate slightly higher than 800 so that you get closer to 240lbs.
  2. N

    Struggling with race car set-up? Get expert advice here!

    I'm confused :S When you did '.54 x .54 x 800 = 233 lbs. spring required to handle weight transferred' at the bottom of slide #19 you are using a spring rate to find a spring rate? Does the 233lbs mean only 233lbs of the 800lbs spring is being used?
  3. N

    Struggling with race car set-up? Get expert advice here!

    I see, so what this basically means is that your spring rate can have a much lower value than the weight transfer load and still be able to support it due to the mechanical setup of the suspension?
  4. N

    Struggling with race car set-up? Get expert advice here!

    Using the wheel load rate equation with variables A, B, C and D in the picture in slide #17 i get Kwl = 0.566Ks As for the Gs when cornering i am still not sure about, but for now i could just use an estimate and change it for different speeds. At the bottom of slide #19, is the 800lbs the...
  5. N

    How is the roll centre used during braking?

    Yes that is one of my objectives, I've done some calculations already on weight transfer, but how would i select the right spring size? Would i have to use F=kx?
  6. N

    How is the roll centre used during braking?

    The vehicle already exists. Could you answer the question with regards to a four wheeled vehicle then, just so i can make sense of it. Thanks
  7. N

    How is the roll centre used during braking?

    Ok i think I'm kind of getting it. Would you have to use the weight at the rear of the car multiplied by the length between CG and the rear RC to find the % of weight transferred through the roll centre? And then same with the front weight and front RC? Is the RC also used to determine the angle...
  8. N

    How is the roll centre used during braking?

    Thanks for that, I read through the roll centre section and saw this: 'Roll center height determines what percentage of the overturning moment (inside to outside weight transfer) will be distributed onto the tire contact patch a downforce, and what percentage is received as lateral loading...
  9. N

    How is the roll centre used during braking?

    I'm calculating the weight transfer experienced by a car during braking, accelerating and cornering. So far i have been using moment equations with the centre of gravity height. I've used some suspension software to determine the roll centre and was wondering if this is meant to be used when...
  10. N

    MATLAB Merging matrix into a table - Matlab question

    Actually don't worry, I've done it now :D
  11. N

    MATLAB Merging matrix into a table - Matlab question

    I have a variable called 'Node' which has a 1x5 structure and each of the 5 cells is made up of other variables. I now have a 1x5 matrix as a completely separate variable. I am trying to merge the two together, so that in cell 1 of the Node variable, i have the 1x1 value of the matrix, in cell...
  12. N

    MATLAB Simple matrix division in Matlab

    thank you, i knew it was something simple :D
  13. N

    MATLAB Simple matrix division in Matlab

    I have 2 matrices a=[1 2 3 4] and b=[1 4 9 16], i want to divide each term in matrix b by the same term in matrix a, in other words i want to end up with a matrix of [1 2 3 4]. Ive tried doing b/a, which clearly is wrong! Thanks for any help
  14. N

    MATLAB Matlab Bode Plot Tutorial: Combining Two Plots

    Im trying to plot two bode plots on one graph. Can anyone help?
Back
Top