20+ kgs of propellant was mixed in a A200 Hobart mixer in two batches of 10 kgs.
Degassing of the mixture using a high vacuum
For casting of the propellant, a modified hobart mixer bowl was used with a plugable opening in the bottom. This allows for a mess-free filling of the casting tube.
After curing for several days, the lower plug of the casting tube was removed to reveal the nice star shaped XPS core supported by a 30mm aluminium rod.
Subsequently, the propellant was glued into the 130×5 casing using HTPB to avoid any air between liner and casing.
After curing of the HTPB for several days, the XPS core will be dissolved by a mixture of acetone and xylol.
Deelmanl 