Finding True Curve

Hi,

Using 1.53 as the reference for index, what will the true curve be for a Nominal base of 2.50 with a Front Radius of 203.87? I have a formula to divide by 530 but it doesn't make sense the final number of 3.84

Quote:

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Originally Posted by lana c

hi,

using 1.53 as the reference for index, what will the true curve be for a nominal base of 2.50 with a front radius of 203.87? I have a formula to divide by 530 but it doesn't make sense the final number of 3.84

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D = (n-1)/r
2.5 = (n-1)/0.20387
0.509675 = n - 1
n = 1 + 0.509675
n = 1.509675

F1 = (2.5 X 0.509675)/0.53
F1 = 2.4041273585

Quote:

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Originally Posted by lensgrinder

D = (n-1)/r
2.5 = (n-1)/0.20387
0.509675 = n - 1
n = 1 + 0.509675
n = 1.509675

F1 = (2.5 X 0.509675)/0.53
F1 = 2.4041273585

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Thank you!