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Type: Posts; User: Edward M. Kasprzak

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  1. Replies
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    I'll second Claude's thoughts, and add a few more...

    I'll second Claude's thoughts, and add a few more based on my own judging experience.

    Whether you write your own code or use third-party software it is important to validate (correlate) your...
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    In my first year of design judging I teamed-up...

    In my first year of design judging I teamed-up with Doug during Finals. I learned a lot from Doug in a short amount of time. So many others--students and professionals alike--can say the same...
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    I think MMM diagrams are useful for understanding...

    I think MMM diagrams are useful for understanding potential transient performance plus stability, control, trim, sensitivities, balance, limit behavior, on-center behavior and responses to changes in...
  4. 10 Years of the FSAE Tire Test Consortium

    A brief historical note:

    Ten years ago this week the seeds for the FSAE Tire Test Consortium were sown at the 2004 SAE Motorsports Engineering Conference in Dearborn, MI. Informal discussions...
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    Adding to these good replies: I wouldn't expect...

    Adding to these good replies: I wouldn't expect an FSAE tire to be overloaded at 2000N. Tire model extrapolation that far above the highest test load, however, can give inaccurate results. ...
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    Here's a long post, but let me see if I can put a...

    Here's a long post, but let me see if I can put a few things in perspective. I don't think this needs to be so stressful.

    First, while there is no contract for anyone to sign there are definite...
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    Thanks for the note, Claude. This is especially...

    Thanks for the note, Claude. This is especially disappointing since I personally e-mailed all TTC members earlier this year (re)stating the importance of the Calspan decal. We know there's student...
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    Two thougths: All laboratory tire data should...

    Two thougths:

    All laboratory tire data should be correlated with on-car performance. Occasionally the two line-up very well and you're ready to go. Usually there is a process of understanding...
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    Adding to Doug's #2: While there is some...

    Adding to Doug's #2: While there is some disagreement between the data from round 4 and round 5 data for this tire, the differences in the data are not as extreme as seen in the models provided by...
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    Doug Milliken and I have posted a response to...

    Doug Milliken and I have posted a response to your question on the TTC forum.
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    Doug Milliken and I are very busy this week, but...

    Doug Milliken and I are very busy this week, but we will review Menisk's question and reply next week.

    I will note that all TTC data has been collected on the Calspan Tire Research Facility's flat...
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    This. Nothing to laugh at here, except perhaps...

    This. Nothing to laugh at here, except perhaps the thread title.
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    Sticky: There are two "stickied" threads worth reading,...

    There are two "stickied" threads worth reading, one called "Book List for reference to car design" and the other "SAE Papers on Formula SAE". You'll find useful suggestions there.

    I suggest...
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    And I'm saying you don't need this formula to...

    And I'm saying you don't need this formula to calculate Y. Use Newton's second law. Then, use this formula to determine β (given your assumption regarding δ). It's a lot easier than trying to...
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    Hello M.logan, According to your original post...

    Hello M.logan,

    According to your original post you are trying to determine the lateral force acting on your car during the skidpad event. The skidpad has a known radius and you have specified a...
  16. I'm thinking Road America (with many more...

    I'm thinking Road America (with many more wiggles, of course)

    http://en.wikipedia.org/wiki/File:Road_America.svg

    There's only so many ways to fold a track onto a rectangle of available land! ...
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    Claude, The more I learn about cultures beyond...

    Claude,

    The more I learn about cultures beyond my own the more fascinated I am by our collective human race. Broadening one's perspective is always beneficial.

    The whole "teachers, not...
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    Sometimes I think Pat is too blunt. Pat probably...

    Sometimes I think Pat is too blunt. Pat probably thinks that I'm not harsh enough sometimes. I could make a similar comparison with Claude and vice versa. The fact is that everyone doesn't speak...
  19. MP4/4, Going back to my original reply, if you...

    MP4/4,

    Going back to my original reply, if you assume 0.9 for mu on your most heavily loaded tire, what mu will be required from your other tires to achieve 1.5g braking and cornering? I think...
  20. MP4/4, Thanks for the thoughtful answers to my...

    MP4/4,

    Thanks for the thoughtful answers to my questions. I'm glad you're thinking about the problem: You have some justification for your values and you understand why I was questioning your...
  21. I suggest extending this calculation to all four...

    I suggest extending this calculation to all four wheels. Then ask yourself if the results make sense. Make sure you haven't "lost" any tire forces along the way--i.e., you still get your target...
  22. Alumni, I'm not sure what your experiences...

    Alumni,

    I'm not sure what your experiences have been, but I can add this data point: In my design queues we have always considered serviceability. In fact, it is combined with manufacturability...
  23. Biro, welcome to the forum! Mu is Fy1/Fz...

    Biro, welcome to the forum!

    Mu is Fy1/Fz (using your "Fy1" definition). You are correct that Mu varies with Fz, and that Fy/Fy1 always gives a peak of 1. Please see RCVD Figure 14.1--all the...
  24. Sticky: So a couple of guys got together and they had a...

    So a couple of guys got together and they had a few moments. Z, am I using the couple and moment terms correctly?

    Geoff, you're basically saying that this is first and foremost a project...
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    Yes, I can. But the idea is for you to learn,...

    Yes, I can. But the idea is for you to learn, not for me to show you that I have already learned.

    You have other resources. Google is your friend. In the past some teams have posted their...
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