A hardly known engine, the SR-71 had been installed in the Loki PWN-8 missile.

-The SR-100 and SR-110 were used in the PWN-10, -11, -12. "SR" means Solid Rocket in the US Military nomenclature.

From appendix 9: The company is situated in Tampa, Arizona. They manufactured the two rocket engines for the SR-110 and SR-71.