That is precisely what I am asking. And also suggesting some ways the lack of compression and shear properties can be enhanced to make the cheaper cores usable. Getting the engineering numbers is the first part. The second part is testing, both bench and full size. Then we can include it in the plans.
We have not done this previously as there was too much going on getting Intelligent Infusion and the resulting boats happening.. Now that this is coming under control, we can focus on further improvements, of which optimising the core is one.
Re your cooked polystyrene:
Interesting results. I would be interested to know if there is any difference in shear properties. ie Glue a piece of squashed/heated to a piece of normal then glue a piece of ply (great for stuff like this) on each side with an inch or so sticking out at opposite ends. Put it in the vice and apply pressure to the bits sticking out so the material is loaded in sheer. See what happens.
On Sun, Jul 8, 2018 at 11:02 AM, eruttan@yahoo.com [harryproa] <harryproa@yahoogroups.com.au> wrote:
Rob, would a resonable question be for said engineer, "Is 400kpa XPS a resonable core for a harry?", or the corresponding 700kpa material? Or where they can be used safely?Which is more like asking (where ) will h60 do? Or h45?Perhaps more interestingly, can some parts of some of the harrys be made out of these as a cost optomization question? And what can't?I mean, your asking the questions and paying the bills, so you do you. Untill I pony up the cost of a call to Scaled Composites, I got no reson to expect an answer.
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Posted by: Rob Denney <harryproa@gmail.com>
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