Craig Limber
Jun 01, 1996, 01:00 AM
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<title>A Table of Balsa Masses</title>
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<pre>I've been weighing my balsa lately in order to sort it (I have a lot now)
and made up this table of expected masses for various widths/thicknesses of
91.9cm (36") balsa stock. This is simply so I can weigh the chunk in question,
cross reference its size in the table and use that to find its approximate
density in grams/liter. There are 11 tables, one for each of the popular
widths and within each are up to 8 thicknesses. Each line of the table is the
calculated mass of balsa of a certain density measured in grams per liter.
All of the masses are in grams. This table has proven to be quite handy
in helping me pick out the right balsa for my free-flight airplanes and
I thought some of you out there might like it. Please feel free to email
any suggestions or corrections.
No, I didn't calculate them all by hand, I wrote a program. :-)
For those of you who like to express densities in the SAE system,
A density of 16 grams per liter is very close to 1 pound per cubic foot
(i.e. 64 g/l is about 4lb/ft^3). I expressed the densities as multiples
of 16 to make it easy to trsanslate to lbs/cubic foot for those who are
more comfortable with that.
In case you are wondering what values I used to convert the units:
1 cubic foot is 28.316846592 liters
453.53472 grams per pound
1 pound/cubic foot is is the same density as 16.016427483 grams/liter.
2.54 cm per inch.
Craig
climber(at)myra.com
For Balsa of width 1.59mm (1/16"). For Balsa of width 2.38mm (3/32").
1.59mm 1.59mm 2.38mm
dens 1/16" dens 1/16" 3/32"
------------- ---------------------
64 4 0.15 64 0.22 0.33
96 6 0.22 96 0.33 0.50
128 8 0.30 128 0.44 0.66
160 10 0.37 160 0.55 0.83
192 12 0.44 192 0.66 1.00
224 14 0.52 224 0.78 1.16
For Balsa of width 3.18mm (1/8"). For Balsa of width 4.76mm (3/16").
1.59mm 2.38mm 3.18mm 1.59mm 2.38mm 3.18mm 4.76mm
dens 1/16" 3/32" 1/8" dens 1/16" 3/32" 1/8" 3/16"
---------------------------- -----------------------------------
64 0.30 0.44 0.59 64 0.44 0.66 0.89 1.33
96 0.44 0.66 0.89 96 0.66 1.00 1.33 1.99
128 0.59 0.89 1.18 128 0.89 1.33 1.77 2.66
160 0.74 1.11 1.48 160 1.11 1.66 2.21 3.32
192 0.89 1.33 1.77 192 1.33 1.99 2.66 3.99
224 1.03 1.55 2.07 224 1.55 2.33 3.10 4.65
For Balsa of width 6.35mm (1/4").
1.59mm 2.38mm 3.18mm 4.76mm 6.35mm
dens 1/16" 3/32" 1/8" 3/16" 1/4"
-----------------------------------------------
64 0.59 0.89 1.18 1.77 2.36
96 0.89 1.33 1.77 2.66 3.54
128 1.18 1.77 2.36 3.54 4.72
160 1.48 2.21 2.95 4.43 5.91
192 1.77 2.66 3.54 5.32 7.09
224 2.07 3.10 4.13 6.20 8.27
For Balsa of width 9.53mm (3/8").
1.59mm 2.38mm 3.18mm 4.76mm 6.35mm 9.53mm
dens 1/16" 3/32" 1/8" 3/16" 1/4" 3/8"
----------------------------------------------------
64 0.89 1.33 1.77 2.66 3.54 5.32
96 1.33 1.99 2.66 3.99 5.32 7.97
128 1.77 2.66 3.54 5.32 7.09 10.63
160 2.21 3.32 4.43 6.64 8.86 13.29
192 2.66 3.99 5.32 7.97 10.63 15.95
224 3.10 4.65 6.20 9.30 12.40 18.60
For Balsa of width 12.7mm (1/2").
1.59mm 2.38mm 3.18mm 4.76mm 6.35mm 9.53mm 12.7mm
dens 1/16" 3/32" 1/8" 3/16" 1/4" 3/8" 1/2"
-----------------------------------------------------------
64 1.18 1.77 2.36 3.54 4.72 7.09 9.45
96 1.77 2.66 3.54 5.32 7.09 10.63 14.17
128 2.36 3.54 4.72 7.09 9.45 14.17 18.90
160 2.95 4.43 5.91 8.86 11.81 17.72 23.62
192 3.54 5.32 7.09 10.63 14.17 21.26 28.35
224 4.13 6.20 8.27 12.40 16.54 24.81 33.07
For Balsa of width 25.4mm (1").
1.59mm 2.38mm 3.18mm 4.76mm 6.35mm 9.53mm 12.7mm 25.4mm
dens 1/16" 3/32" 1/8" 3/16" 1/4" 3/8" 1/2" 1"
------------------------------------------------------------------
64 2.36 3.54 4.72 7.09 9.45 14.17 18.90 37.80
96 3.54 5.32 7.09 10.63 14.17 21.26 28.35 56.70
128 4.72 7.09 9.45 14.17 18.90 28.35 37.80 75.60
160 5.91 8.86 11.81 17.72 23.62 35.44 47.25 94.50
192 7.09 10.63 14.17 21.26 28.35 42.52 56.70 113.40
224 8.27 12.40 16.54 24.81 33.07 49.61 66.15 132.30
For Balsa of width 50.8mm (2").
1.59mm 2.38mm 3.18mm 4.76mm 6.35mm 9.53mm 12.7mm 25.4mm
dens 1/16" 3/32" 1/8" 3/16" 1/4" 3/8" 1/2" 1"
------------------------------------------------------------------
64 4.72 7.09 9.45 14.17 18.90 28.35 37.80 75.60
96 7.09 10.63 14.17 21.26 28.35 42.52 56.70 113.40
128 9.45 14.17 18.90 28.35 37.80 56.70 75.60 151.20
160 11.81 17.72 23.62 35.44 47.25 70.87 94.50 189.00
192 14.17 21.26 28.35 42.52 56.70 85.05 113.40 226.80
224 16.54 24.81 33.07 49.61 66.15 99.22 132.30 264.60
For Balsa of width 76.2mm (3").
1.59mm 2.38mm 3.18mm 4.76mm 6.35mm 9.53mm 12.7mm 25.4mm
dens 1/16" 3/32" 1/8" 3/16" 1/4" 3/8" 1/2" 1"
------------------------------------------------------------------
64 7.09 10.63 14.17 21.26 28.35 42.52 56.70 113.40
96 10.63 15.95 21.26 31.89 42.52 63.79 85.05 170.10
128 14.17 21.26 28.35 42.52 56.70 85.05 113.40 226.80
160 17.72 26.58 35.44 53.16 70.87 106.31 141.75 283.50
192 21.26 31.89 42.52 63.79 85.05 127.57 170.10 340.19
224 24.81 37.21 49.61 74.42 99.22 148.83 198.45 396.89
For Balsa of width 101.6mm (4").
1.59mm 2.38mm 3.18mm 4.76mm 6.35mm 9.53mm 12.7mm 25.4mm
dens 1/16" 3/32" 1/8" 3/16" 1/4" 3/8" 1/2" 1"
------------------------------------------------------------------
64 9.45 14.17 18.90 28.35 37.80 56.70 75.60 151.20
96 14.17 21.26 28.35 42.52 56.70 85.05 113.40 226.80
128 18.90 28.35 37.80 56.70 75.60 113.40 151.20 302.39
160 23.62 35.44 47.25 70.87 94.50 141.75 189.00 377.99
192 28.35 42.52 56.70 85.05 113.40 170.10 226.80 453.59
224 33.07 49.61 66.15 99.22 132.30 198.45 264.60 529.19
By: Craig Limber
<a href="http://rcgroups.com/shared/nospam.php?u=climber&d=rio.myra.com">climber(at)rio.myra.com</a></pre>
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<head>
<title>A Table of Balsa Masses</title>
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<body bgcolor="#FFFFFF">
<pre>I've been weighing my balsa lately in order to sort it (I have a lot now)
and made up this table of expected masses for various widths/thicknesses of
91.9cm (36") balsa stock. This is simply so I can weigh the chunk in question,
cross reference its size in the table and use that to find its approximate
density in grams/liter. There are 11 tables, one for each of the popular
widths and within each are up to 8 thicknesses. Each line of the table is the
calculated mass of balsa of a certain density measured in grams per liter.
All of the masses are in grams. This table has proven to be quite handy
in helping me pick out the right balsa for my free-flight airplanes and
I thought some of you out there might like it. Please feel free to email
any suggestions or corrections.
No, I didn't calculate them all by hand, I wrote a program. :-)
For those of you who like to express densities in the SAE system,
A density of 16 grams per liter is very close to 1 pound per cubic foot
(i.e. 64 g/l is about 4lb/ft^3). I expressed the densities as multiples
of 16 to make it easy to trsanslate to lbs/cubic foot for those who are
more comfortable with that.
In case you are wondering what values I used to convert the units:
1 cubic foot is 28.316846592 liters
453.53472 grams per pound
1 pound/cubic foot is is the same density as 16.016427483 grams/liter.
2.54 cm per inch.
Craig
climber(at)myra.com
For Balsa of width 1.59mm (1/16"). For Balsa of width 2.38mm (3/32").
1.59mm 1.59mm 2.38mm
dens 1/16" dens 1/16" 3/32"
------------- ---------------------
64 4 0.15 64 0.22 0.33
96 6 0.22 96 0.33 0.50
128 8 0.30 128 0.44 0.66
160 10 0.37 160 0.55 0.83
192 12 0.44 192 0.66 1.00
224 14 0.52 224 0.78 1.16
For Balsa of width 3.18mm (1/8"). For Balsa of width 4.76mm (3/16").
1.59mm 2.38mm 3.18mm 1.59mm 2.38mm 3.18mm 4.76mm
dens 1/16" 3/32" 1/8" dens 1/16" 3/32" 1/8" 3/16"
---------------------------- -----------------------------------
64 0.30 0.44 0.59 64 0.44 0.66 0.89 1.33
96 0.44 0.66 0.89 96 0.66 1.00 1.33 1.99
128 0.59 0.89 1.18 128 0.89 1.33 1.77 2.66
160 0.74 1.11 1.48 160 1.11 1.66 2.21 3.32
192 0.89 1.33 1.77 192 1.33 1.99 2.66 3.99
224 1.03 1.55 2.07 224 1.55 2.33 3.10 4.65
For Balsa of width 6.35mm (1/4").
1.59mm 2.38mm 3.18mm 4.76mm 6.35mm
dens 1/16" 3/32" 1/8" 3/16" 1/4"
-----------------------------------------------
64 0.59 0.89 1.18 1.77 2.36
96 0.89 1.33 1.77 2.66 3.54
128 1.18 1.77 2.36 3.54 4.72
160 1.48 2.21 2.95 4.43 5.91
192 1.77 2.66 3.54 5.32 7.09
224 2.07 3.10 4.13 6.20 8.27
For Balsa of width 9.53mm (3/8").
1.59mm 2.38mm 3.18mm 4.76mm 6.35mm 9.53mm
dens 1/16" 3/32" 1/8" 3/16" 1/4" 3/8"
----------------------------------------------------
64 0.89 1.33 1.77 2.66 3.54 5.32
96 1.33 1.99 2.66 3.99 5.32 7.97
128 1.77 2.66 3.54 5.32 7.09 10.63
160 2.21 3.32 4.43 6.64 8.86 13.29
192 2.66 3.99 5.32 7.97 10.63 15.95
224 3.10 4.65 6.20 9.30 12.40 18.60
For Balsa of width 12.7mm (1/2").
1.59mm 2.38mm 3.18mm 4.76mm 6.35mm 9.53mm 12.7mm
dens 1/16" 3/32" 1/8" 3/16" 1/4" 3/8" 1/2"
-----------------------------------------------------------
64 1.18 1.77 2.36 3.54 4.72 7.09 9.45
96 1.77 2.66 3.54 5.32 7.09 10.63 14.17
128 2.36 3.54 4.72 7.09 9.45 14.17 18.90
160 2.95 4.43 5.91 8.86 11.81 17.72 23.62
192 3.54 5.32 7.09 10.63 14.17 21.26 28.35
224 4.13 6.20 8.27 12.40 16.54 24.81 33.07
For Balsa of width 25.4mm (1").
1.59mm 2.38mm 3.18mm 4.76mm 6.35mm 9.53mm 12.7mm 25.4mm
dens 1/16" 3/32" 1/8" 3/16" 1/4" 3/8" 1/2" 1"
------------------------------------------------------------------
64 2.36 3.54 4.72 7.09 9.45 14.17 18.90 37.80
96 3.54 5.32 7.09 10.63 14.17 21.26 28.35 56.70
128 4.72 7.09 9.45 14.17 18.90 28.35 37.80 75.60
160 5.91 8.86 11.81 17.72 23.62 35.44 47.25 94.50
192 7.09 10.63 14.17 21.26 28.35 42.52 56.70 113.40
224 8.27 12.40 16.54 24.81 33.07 49.61 66.15 132.30
For Balsa of width 50.8mm (2").
1.59mm 2.38mm 3.18mm 4.76mm 6.35mm 9.53mm 12.7mm 25.4mm
dens 1/16" 3/32" 1/8" 3/16" 1/4" 3/8" 1/2" 1"
------------------------------------------------------------------
64 4.72 7.09 9.45 14.17 18.90 28.35 37.80 75.60
96 7.09 10.63 14.17 21.26 28.35 42.52 56.70 113.40
128 9.45 14.17 18.90 28.35 37.80 56.70 75.60 151.20
160 11.81 17.72 23.62 35.44 47.25 70.87 94.50 189.00
192 14.17 21.26 28.35 42.52 56.70 85.05 113.40 226.80
224 16.54 24.81 33.07 49.61 66.15 99.22 132.30 264.60
For Balsa of width 76.2mm (3").
1.59mm 2.38mm 3.18mm 4.76mm 6.35mm 9.53mm 12.7mm 25.4mm
dens 1/16" 3/32" 1/8" 3/16" 1/4" 3/8" 1/2" 1"
------------------------------------------------------------------
64 7.09 10.63 14.17 21.26 28.35 42.52 56.70 113.40
96 10.63 15.95 21.26 31.89 42.52 63.79 85.05 170.10
128 14.17 21.26 28.35 42.52 56.70 85.05 113.40 226.80
160 17.72 26.58 35.44 53.16 70.87 106.31 141.75 283.50
192 21.26 31.89 42.52 63.79 85.05 127.57 170.10 340.19
224 24.81 37.21 49.61 74.42 99.22 148.83 198.45 396.89
For Balsa of width 101.6mm (4").
1.59mm 2.38mm 3.18mm 4.76mm 6.35mm 9.53mm 12.7mm 25.4mm
dens 1/16" 3/32" 1/8" 3/16" 1/4" 3/8" 1/2" 1"
------------------------------------------------------------------
64 9.45 14.17 18.90 28.35 37.80 56.70 75.60 151.20
96 14.17 21.26 28.35 42.52 56.70 85.05 113.40 226.80
128 18.90 28.35 37.80 56.70 75.60 113.40 151.20 302.39
160 23.62 35.44 47.25 70.87 94.50 141.75 189.00 377.99
192 28.35 42.52 56.70 85.05 113.40 170.10 226.80 453.59
224 33.07 49.61 66.15 99.22 132.30 198.45 264.60 529.19
By: Craig Limber
<a href="http://rcgroups.com/shared/nospam.php?u=climber&d=rio.myra.com">climber(at)rio.myra.com</a></pre>
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