Quote:
Originally Posted by v67gsr
You talk about load on the bolts. Have you forgotten there are more than just bolts? Did your simulation factor in the mounting area structural strength? Down force and backward drag load which increase exponentially as speed increase? How about the leverage ratio that will multiply the amount of load and the leverage point factor that will alter the direction of load apply to the different mounting points? Form the number you provide, I don’t think you have consider those factors. Aero is more than just single direction load on single object. You can have bolts made out of adamantium or vibranium but if the surface you mounted to is weak, the aero will still fail at speed. Simple physic. I have my share of aero failure and I almost killed myself. I was as naives as you are today thinking the mountings and bolts that I used to bolt the splitter to the front lip were strong enough and paid no attention to the mountings of the lip itself. Result was half of the front lip got torn off by the down force generated by the splitter. It happened just before turn 1 on Pacific. I was lucky to walk away without any dent on my car and myself. I don’t want the same happen to anyone playing with aero.
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So, I spoke to the Driver just now to address your concerns.
He still would like to see an answer, whether or not his wing will hold up ALL 80 pizzas or not.
The driver would like to comment that while your concerns may be borderline legitimate, you still make a huge assumption that he has not factored in these considerations in his design. For starters his wing is not a high camber wing, L/D ratio is quite low. Based on one picture he felt slightly offended that you were able to determine so many things regarding his design yet did not address your own wing being mounted on your trunk. The hypocrisy makes him feel like he should no longer listen to you.
However he took the time out of his lunch break today to type out this response:
"V67-GSR's concerns are all based on theory and I doubt he has calculated anything for his own designs seeing as he thought bolting a splitter to a front lip would hold up. It's kind of funny how you think that we are the same person.
For starters I don't think he understands what a Newton or a Pound is and how that even translates to strength of materials for what I'm using. Based on his leverage ratio analogy I believe he is more well versed in the field of accounting than engineering.
I saw your post regarding the grade strength of the bolts and how my wing would create a moment based on the way it's mounted and I'm glad you ran the math as well.
It seems like V67-GSR doesn't have a clue what a moment is or anything engineering related since he seems to like to repeat the same thing you had commented earlier but worded it as a question. He seems to think FEA simulations can only be done on single objects, I'm glad you loaded up ANSYS to do your simulations as that can take some time out of your work day to do.
Some people are clueless I say, clueless."