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Post by murph on Jul 15, 2012 17:09:48 GMT -6
The coefficient of linear expansion of aluminum is 12.3 X 10^(-6)in/in*F.
Assume 40 feet of track and a car that runs 2.9000 seconds @ 80F at PWDR in the summer. It is November and the ambient temperature in Evo's place is 70F.
What influence will this engineering property have on the car's track time if everything else is the same during the November Race? Assume 40 usable feet of track for simplicity.
First person to answer correctly gets a killer set of stock or limited wheels if they enter the August PWDR race. They can defer the set of wheels onto another racer if need be. Answer the question in five decimal points please...... Thus, one would have to be pretty lucky to guess the correct answer.
Murph SLT
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Post by murph on Jul 15, 2012 17:11:19 GMT -6
B: You need help? ;D Remember the rounded corners.... Murph
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Post by B.S.B. Racing on Jul 15, 2012 18:33:04 GMT -6
The coefficient of linear expansion of aluminum is 12.3 X 10^(-6)in/in*F. Assume 40 feet of track and a car that runs 2.9000 seconds @ 80F at PWDR in the summer. It is November and the ambient temperature in Evo's place is 70F. What influence will this engineering property have on the car's track time if everything else is the same during the November Race? Assume 40 usable feet of track for simplicity. First person to answer correctly gets a killer set of stock or limited wheels if they enter the August PWDR race. They can defer the set of wheels onto another racer if need be. Answer the question in five decimal points please...... Thus, one would have to be pretty lucky to guess the correct answer. Murph SLT Yes "M" I do remember the radius in the corners. By your post I see you remember it as well! ;D BTW I will be bringing my own set of killer wheels in August so I don't need to answer the question! LOL Formulas are just that.........nothing more. We both know there is a lot more to it than just numbers! Make sure you have that HR66 tuned up for the 4th! It might be 100 degrees in Evo's shop............now let's see, what does that figure out to be in 40 feet?
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Post by murph on Jul 15, 2012 18:49:38 GMT -6
I can always find B's areas of sensitivity.
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Post by B.S.B. Racing on Jul 15, 2012 18:51:08 GMT -6
I can always find B's areas of sensitivity. You didn't name that car BSB Prod for nothing!!!!!
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Post by murph on Jul 15, 2012 19:00:22 GMT -6
B, It will be great seeing a new HR from you. I know one thing: It will be hard to beat the looks of "Bad Gas". That car is just rules! Murph
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Post by ZZ Racing on Jul 15, 2012 19:35:25 GMT -6
2.894096
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Post by murph on Jul 15, 2012 19:47:25 GMT -6
Z, Not that much time change. Your time is too low. Murph
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Post by psycaz on Jul 15, 2012 20:08:40 GMT -6
2.89988
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Post by murph on Jul 15, 2012 20:10:24 GMT -6
Hint: Figure out change in track length. Set that number aside.
Now, make a correlation between: time/track length. These number were given to you.
Multiply time/track length by change in track length.
You will be left with a time.
Subtract that time from the original time.
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Post by murph on Jul 15, 2012 20:12:24 GMT -6
Real close, are you rounding?
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Post by psycaz on Jul 15, 2012 20:12:50 GMT -6
YES
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Post by psycaz on Jul 15, 2012 20:13:14 GMT -6
2.899877
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Post by murph on Jul 15, 2012 20:14:37 GMT -6
Dont round-off and I think you got it
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Post by psycaz on Jul 15, 2012 20:19:30 GMT -6
2.899508 so 2.89951 My math skills have eroded terribly over the years. A couple decades ago, this would have been easy.
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