Steel pyramid and steel overall; ceramic, then called Insalute cement, coated over injector holes underneath; probably "flake asbestos" inside the frustrum (pyramid) hollow, according to original Goddard notes, Vol. III, p. IX-20, cited below in Documentation.
Overall: 9 1/2 in. long x 7 in. diameter (24.13 x 17.78cm)
PROPULSION-Components (Engine Parts)
Country of Origin:
United States of America
December 1929 - March 1930
Gift of the Daniel & Florence Guggenheim Foundation.