Doug68
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| posted on 25/11/07 at 06:26 AM |
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Brake Master Cylinder size XLS Calc sheet?
I'm not sure if it was this forum or not but...
I while back someone had a XLS spreadsheet for helping to calc brake master cylinder sizes.
I managed to lose my copy so if someones got this can you let me know?
Thanks,
[Edited on 25/11/07 by Doug68]
Doug. 1TG
Sports Car Builders WA
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Fred W B
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| posted on 25/11/07 at 08:02 AM |
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I've got it on my work computor, so can only send tomorrow
Cheers
Fred W B
You can do it quickly. You can do it cheap. You can do it right. – Pick any two.
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kikiturbo
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| posted on 25/11/07 at 08:42 AM |
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hi,
you can find my brake balance sheet at:
http://www.bib-nakladnistvo.hr/x1000/
there are a few aplications in there, incl. my middy.... I lost the word file with the instructions somewhere, but try it, you should figure it out
easily...
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Doug68
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| posted on 25/11/07 at 09:35 AM |
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Kikiturbo,
Thanks for that, it's not the worksheet I remember but good nonetheless.
Fred,
I'll be interested to see the worksheet you have to compare the two.
Thanks,
Doug. 1TG
Sports Car Builders WA
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kikiturbo
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| posted on 25/11/07 at 12:41 PM |
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yes, this is the sheet I did myself.. I'd also like to see some others just ot compare...
but, it is just basic physics... the only usuall unknown is the weight transfer under braking dependant on the COG height....
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Doug68
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| posted on 26/11/07 at 04:03 AM |
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Kikiturbo,
Working through the sheet I think I might have found an issue...
The FR. mast. cyl. piston rod force (N) is:
FR. Req. force on the pad (N) * (Front master cylinder diameter (mm) / Total caliper piston area - per side)
But there's 2 calipers on each end of the vehicle so shouldn't the caliper area be doubled in that case? Or have I missed something in
the math there?
Attached is my revised version of the XLS I've also added lines to determine the caliper piston movement as I think that there's a minimum
safe amount of travel required there, but I'm not 100% sure what that value is, anyone care to suggest a value?
Doug. 1TG
Sports Car Builders WA
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Fred W B
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| posted on 26/11/07 at 05:44 AM |
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I attach the spreadsheet I have , originally from 'Mike Polan' on here
Cheers
Fred W B
You can do it quickly. You can do it cheap. You can do it right. – Pick any two.
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Doug68
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| posted on 27/11/07 at 08:37 AM |
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I guess Kikiturbo's worksheet was more correct in its unmodified form.
Used in that way I get quite close agreement between the two workbooks.
The graphs in the second workbook took a bit of deciphering but now I realize the meaning.
A person could stuff about with the combinations in there for hours on end.
Doug. 1TG
Sports Car Builders WA
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