[PSUBS-MAILIST] Non developable surfaces

[Alan]

Hi Joe,
I'm not quite following you, but here are some suggestions.
you can cut out an oval section from a sheet of ply wood or similar & use it as 
the template to blow the acrylic. Or blow it in to a female form. However
contouring it to the sub shape & having it bubble out from there seems difficult.
   The only way I could imagine you doing it would be to tip your sub on it's side,
heat the acrylic sheet & drape it over the sub. Then trim it to shape & weld brackets 
to the sub to clamp it & a female mold on. Then heat the acrylic & quickly bolt it & 
the mold to the submarine. You could blow compressed air in to it through a through hull.
Experimenting with a scale model would help.
Hope that makes sense. Of course Greg is our resident expert.
Alan
Sent from my iPad

> On 15/02/2014, at 6:18 pm, Joe Perkel <josephperkel at yahoo.com> wrote:ex
> 
> 
> How much trouble is it to form acrylic in two directions? As in following a complex hull form to make an integral window.
> 
> In other words a transparent section of MBT with a bidirectional curve.
> 
> Joe
> 
> 
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