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  #1  
Old 11-23-2006, 03:55 PM
grp.boat grp.boat is offline
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New Rib

I have made a 1:4 scale model of a 7mtr rib which i want to build early next year. The full size rib will weigh approx 500kg.
Should the model hull weigh 125kg? which is a quater of the weight....

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Old 11-23-2006, 07:15 PM
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RANCHI OTTO RANCHI OTTO is offline
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Weight model = Weight full scale / (scale)^3

W model = 500 / (4)^3

W model = 7.81 kg
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Old 11-24-2006, 01:23 AM
grp.boat grp.boat is offline
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thanks rancho.

what does ^ mean?
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Old 11-24-2006, 01:43 AM
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RANCHI OTTO RANCHI OTTO is offline
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^ means exponent....

(4)^3 means 4x4x4
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Old 11-25-2006, 12:58 PM
grp.boat grp.boat is offline
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so if i want to build a model of a 800kg boat. It should weigh 12.5kg?



i still don't understand the ^ 4x4x4

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Old 11-25-2006, 02:28 PM
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RANCHI OTTO RANCHI OTTO is offline
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Bravo...right !
4^3 means 4 exponent 3 = 4 x 4 x 4

4^2 means 4 to square = 4 x 4 = 16

More than that I can't explain, I'm sorry....
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