Shutter Assembly, Pulsejet, Loon Missile

Rectangular, steel, with non-ferrous edges along both lengths; these edges with equidistant holes; middle section of rectangle, a grill divided into six compartments, each compartment with slightly curved edged lips or flaps, each side of flap tightly hitting other side but may be opened with fingers, these flaps serving as the air intake flaps of the pulsejet engine; green painted curved steel pipe running along middle of grill, trombone-like, and adjoining in-line lower pipe on grill, these pipes probably serving as fuel pipes; four equidistant rods protruding about 1.5 inches on opposite side of grill.