Custom Bats Cricket Forum
Companies => Custom companies => B3 Cricket => Topic started by: Mfarank on May 25, 2020, 04:20:35 PM
-
Can someone please enlighten me as to how B3 calculate the density of their clefts? I know the basic idea is mass/volume but what is the unit?
-
After playing around with the units of a cleft i have come up with the mass as 60.85 ounces and a volume of 0.1431 cubic feet. And the number was 425.3 so i am guessing this must be it
-
After playing around with the units of a cleft i have come up with the mass as 60.85 ounces and a volume of 0.1431 cubic feet. And the number was 425.3 so i am guessing this must be it
You’re on the right track but 425 is impossibly low density (based on what I recall). But it’s definitely in the 400s so you’re within the ballpark.
-
You’re on the right track but 425 is impossibly low density (based on what I recall). But it’s definitely in the 400s so you’re within the ballpark.
Looking at a few of the trott posts people have had clefts under 400 so surely not impossibly low density.
-
Wasn’t 400 their starting point for an average cleft?
-
Wasn’t 400 their starting point for an average cleft?
I assume so as im talking about the whole cleft pre-handling and shaping
-
Oh sorry. My bad. You guys are right.
-
After playing around with the units of a cleft i have come up with the mass as 60.85 ounces and a volume of 0.1431 cubic feet. And the number was 425.3 so i am guessing this must be it
How is the density calculated?
-
Kg/m^3, I'd guess
-
Mass over volume is the formula. Units is the key. The most commonly used metric units for density are kg/cubic meter and when i put the values in the answer was 425.7
Incidentally when i switch to imperial units (cause you know God save the Queen) and calculate with oz/cubic feet the answer is almost the same (425.3) so it must be one of the Two
-
Mass over volume is the formula. Units is the key. The most commonly used metric units for density are kg/cubic meter and when i put the values in the answer was 425.7
Incidentally when i switch to imperial units (cause you know God save the Queen) and calculate with oz/cubic feet the answer is almost the same (425.3) so it must be one of the Two
Exactly? It shouldn't be... On the subject of units, the UK is not America, we may use imperial units on road signs but you won't find them used for actual work.
-
Corrected to "almost" the same :D this was a fun excercise for revising high school math. I had forgotten how to calculate area of a triangle
-
Exactly? It shouldn't be... On the subject of units, the UK is not America, we may use imperial units on road signs but you won't find them used for actual work.
Yeah but we do quote bat weights in pounds and oz don't we???
-
from memory average density of a cleft was 400
If a shape you liked was 2lb 10 but you wanted 2lb 8 then you could need a lower density - i think a density of 10 was an ounce
favourite shape at 2lb 8 would need a 380
-
from memory average density of a cleft was 400
If a shape you liked was 2lb 10 but you wanted 2lb 8 then you could need a lower density - i think a density of 10 was an ounce
favourite shape at 2lb 8 would need a 380
I think this is correct as had a couple of B3 bats under 400, one as low 369.
Copying in @Butterfingerz for an official response
-
I think this is correct as had a couple of B3 bats under 400, one as low 369.
Copying in @Butterfingerz for an official response
Hi all, sorry I can’t disclose how we calculate the density (company secret), everything else you’ve said about averages and value of 10 being roughly an ounce is correct.
-
Doesn't Tom just count all the little air pockets in each cleft Rich? :D
-
I guess I can disclose the method I came up with for calculating the approximate density of the partmades. :D
As my partmades were not uniform and had differing ammounts cut from them, I decided to accurately measure their displacement, rather than use a tape measure and attempt to calculate their volume.
(https://i.imgur.com/wWx6BGl.jpg)
I had a short length of 250mm PVC pipe, sealed one end and filled it to the top with water.
The partmade was then put in a large garbage bag and lowered into the water until the bottom of the lathe mark on the handle was level with the water.
From there, the partmade was removed from the pipe, and I measured how far down the water level was from the top. Simple Pi R^2 H to get the displacement, weight/displacement=density.
The only innacuracy is that the volume of the entire handle isn't measured, but I figure all the handles should be fairly similar, so it should be close enough for getting relative densities between the partmades I had.
Despite all six partmades looking pretty much the same, their volumes varied from 3.65 to 3.87 L.
Their ranking from lightest to heaviest was not the same as their ranking from least dense to most dense, but there wasn't much in it.