Re: [bolger] Digest Number 1945
On 23 Mar 2004bolger@yahoogroups.comwrote:
dealing with a "core" and two strong sheet of epoxy-glass, then swiss
cheesiness isn't much of an issue. The outer skins are what matter most
in core-construction, and as long as the corre keeps from collapsing,
voids aren't too much of a problem.
However, Bolger's Micro is not "core construction" but rather plywood
construction, with an optional glass/epoxy coating (highly recommended).
Here, the voids matter.
I'm in the midst of building two boats, one a little Michalak skiff out of
5mm lauan, and a 22 power skiff that is basically a scaled-up Bolger Teal,
with an outboard in a well in the back. That's 1/2" MDO, and it's a great
plywood to work with.
> The simple difference between BC ply and marine is this: in the thicknessesActually, that's not correct. From an engineering standpoint, if you're
> you are looking at (1/4", 3/8"), BC ply usually consists of ONE thick core
> ply covered by two thin veneer plys. This means that any voids or gaps in
> the center ply are critical. I appreciate your argument about cost, but
> haven't found decent BCX in those sizes in many years. Doesn't matter what
> you coat it with if you've got Swiss cheese as your primary core.
dealing with a "core" and two strong sheet of epoxy-glass, then swiss
cheesiness isn't much of an issue. The outer skins are what matter most
in core-construction, and as long as the corre keeps from collapsing,
voids aren't too much of a problem.
However, Bolger's Micro is not "core construction" but rather plywood
construction, with an optional glass/epoxy coating (highly recommended).
Here, the voids matter.
I'm in the midst of building two boats, one a little Michalak skiff out of
5mm lauan, and a 22 power skiff that is basically a scaled-up Bolger Teal,
with an outboard in a well in the back. That's 1/2" MDO, and it's a great
plywood to work with.