weights

1/2x3x36 Balsa if 4-6 lb = ???oz THANKS MIKE

Bill Calkins on this forum has a program to figure balsa weights.
If I were at home I could give you the link.
Bill <><

LAST EDITED ON Nov-08-04 AT 01:44 PM (CDT)
 
Good morning Mike. I just weighed one of my 1/2X4X36 sheets that I use for profile fuselages and the weight came out to 4 1/2 ounces. As far as I'm concerned, the charts are not as accurate as the actual weight of the piece. As proof, I weighed another one at 5 1/4, 4 3/4, 5 3/4, 5.0 ounces. These are still well within the LB. range and weighed as I took them off of the stack. 1/2X3X36 I weighed in at 4 1/2 and 5.0 for all 4 sheets. Hope this helps. Larry

Balsa is in lbs/cu.ft. Your block is 54 cu.in, or 0.03125 cu.ft.

Since 4 lb is 64 oz, your block should weigh 2 oz if it is 4 lb/cu.ft. Similarly, if it is 6 lb wood, it should weigh 3 oz.

Floyd (not a math major)

LAST EDITED ON Nov-08-04 AT 09:02 PM (CDT)
 
Larry's piece of balsa is 72 cubic in.

1 cubic ft. or 1728 cubic inch/72 cubic inches = 24/1728 or .041666 cubic ft.

.041666 x 64 (oz) = approx. 2.66 oz. if 4 lbs per cubic ft.

.041666 x 80 (oz) = approx. 3.33 oz. if 5 lbs per cubic ft.

.041666 x 96 (oz) = approx. 3.99 oz. if 6 lbs per cubic ft.

I figure any weight between 2.66 oz. and 3.99 oz. is qualifies as 4-6 oz. grade

Michaels piece is 54 cubic inches so:

.03125 x 64 (oz) = approx. 2 oz if 4 lbs per cubic ft.

.03125 x 96 (oz) = approx. 3.0 oz if 6 lbs per cubic ft.

I could be wrong, check my math.

Tight lines,

Thanks, Larry
My piece of 1/2 x 3 x 36 weighted in @ 2.9oz
on our company "postal" elec. scales!
Mike

LAST EDITED ON Nov-08-04 AT 02:32 PM (CDT)
 
I weigh in grams so, IIRC, I look for sheets of 1/2 X 3 X 36 in the 70-80 gram range unless it is for a fuselage.
I weigh each sheet when it comes in and use Bill Calkins calculator to mark each sheet.
Bill <><

>1/2x3x36 Balsa if 4-6 lb = ???oz THANKS MIKE
4# = 2oz
6# = 3oz

Maybe my Post Versalog slide rule has become warped over the years. But I calculate 1/2 X 3 X 36= 54 cu.in.

FC

So does mine but I calculated for Larry's piece first.

>1/2x3x36 Balsa if 4-6 lb = ???oz THANKS MIKE

Take a look at

http://www.nclra.org/Programs/BalsaDensity.php

to calculate just about anything you can think of.

I recently downloaded a neat little program for calculating balsa weights, that sits on my computer desktop.

Contact Bill Calkins at: [email protected] for the address.

With his program you can get your weights to the smallest fraction very quickly, with no math involved (Not for you anyway!)

The nice part is, youre offline while using the program!

Once I used it, I thought it was so kool that I went back and reweighed my entire stash. It took all night but now everything is in order.

Does anyone else have the habit of always using the heaviest 'light stuff' while saving the really great wood for some future "Super Project"? I still have balsa thats 15 years old that I'm 'saving' (Hoarding!) because it's too good to use. What a laff!!

BIGS

" What constitutes the dignity of a craft is that it creates a fellowship, that it binds men together and fashions for them a common language. For there is but one problem - the problem of human relations."

I used to save balsa but now I am using the good stuff. I do not want it to end up on e-bay!

You don't need No Stinkin' Program, but a $2 MyDearAuntSally hand calculator from Wal Mart will calulate it faster.

Currell (and I Don't Got To Show You No Stinkin' Badges, either, Mr Dobbs).

>I used to save balsa but now I am using the good stuff. I
>do not want it to end up on e-bay!

And why do you think they call it dope?