[AR] Re: {Spam?} Re: 3D Printed Plastic Test Engine
- From: Ben Brockert <wikkit@xxxxxxxxx>
- To: "arocket@xxxxxxxxxxxxx" <arocket@xxxxxxxxxxxxx>
- Date: Sun, 2 Oct 2016 17:42:33 -0700
On Sun, Oct 2, 2016 at 5:12 PM, Troy Prideaux
<troy@xxxxxxxxxxxxxxxxxxxxx> wrote:
Yeah, I tend to be just as pessimistic about their longevity at the throat.
Plastics can be reasonably stable with high temps, but the plastics that
tend to be ok are the ones that don’t melt when heated (like phenolics)
however, 3D printing kinda relies on melting to construct the matrix.
FDM relies on melting (or softening under heat) to print, but FDM is
not all of 3D printing. It's possible there exists (or could be
created) an SLA resin that would work similarly to phenolic. There are
also 3D printing processes where sheets of paper are glued together to
create the object; if something like phenolic resin was used as the
glue in such a machine you could probably print a nozzle with
characteristics as good as any other phenolic nozzle.
That said, I don't think a printed plastic engine is relevant to an
MVP because a rocket engine that only works for a few seconds is
unlikely to be a viable product.
Ben
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