Jon,
A long time ago I got some advice from an RRS member to make an ablative
liner for a LOX/alcohol motor (~660 lbf) using fiberglass and this resin
<https://www.dap.com/products-projects/product-categories/adhesives/glues-epoxies/plastic-resin-glue/>.
The combustion chamber liner was made by soaking fiberglass sheets in this
DAP resin glue and wrapping it around a carboard tube to close to net size.
To get an exact fit to the metal motor tube, the wrapped liner was coated
with bondo and lathed to the diameter of the motor case. For this motor the
throat and nozzle were graphite. It worked with no noticeable erosion for
10 seconds.
--- Carl
*From:* arocket-bounce@xxxxxxxxxxxxx <arocket-bounce@xxxxxxxxxxxxx> *On
Behalf Of *Jonathan Adams
*Sent:* Friday, April 9, 2021 5:47 AM
*To:* arocket@xxxxxxxxxxxxx
*Subject:* [AR] Ablative engine composite layup
Hello everyone,
I'm getting to the construction stage of a 4.5kN ablative liquid propellant
engine, and I was wondering if anyone had any good resources for composite
layup for the ablative wall. Possibly even resources specific to composite
layup for small rocket engines.
I haven't been able to find many good resources out there for how to do
this, and I wanted to know if anyone could point me in the right direction
for how to go about this. Even personal experience for how to do this right
(and cost-effectively!) would be greatly appreciated.
Thanks,
Jon.