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The cost depends on what kind of jig you make and what specifications you order for wood. 36" x 1/16" x 1/32" sticks specified to a given amount of pounds per cubic foot cost about $8.25 each from Specialized Balsa, but if you cut your own, the 36" x 4" x 1/32 sheet also specified for density and ...

I am not sure if this has been discussed at length this year, but I was wondering about the benefits / downfalls of utilizing a rectangular, bridge-like base rather than the typically square base. This seems especially pertinent because of the wide angle on bonus towers. I have seen some high level ...

For estimating the modulus of elasticity, I used an extrapolation equation that I got from an MIT study on balsa properties.

Regarding the 0.55 multiplier for towers braced with only X's, I ran into a bit of an issue.

One of the towers (Division C) that I built last season used 3/32 inch square main compression members with a mass of 1.6 g per 36" stick. The tower held full 15 kg for about 10 seconds and then shattered ...

Balsa Man,

When you say "The effective length factor for all Xs is significantly less; about 0.55.", are you referring to the K value in Euler's Buckling theorem explicitly or to some derivation? If explicitly, then X braces should be much better than X s and ladders because the value is squared ...