Aramid honeycomb: the dual constraint of cabin flame-retardancy baselines and low-altitude weight reduction Aircraft cabin interior materials have long operated at the intersection of extreme weight reduction and stringent flammability requirements. The accelerating development of low-altitude economy platforms and unmanned aerial vehicles extends this constraint into lighter and more complex structural parts. PASIA aramid honeycomb cores are produced from para-aramid paper, with cell sizes of 2 mm, 3 mm, 5 mm and 8 mm and core densities adjustable from 29 kg/m³ to 160 kg/m³. When combined with fiberglass or carbon-fiber prepreg skins, sandwich panels can achieve areal weights as low as 30 g/m² while meeting FAR 25.853 flammability requirements for aircraft cabin interiors. Hot-pressed and CNC-carved sandwich panels using carbon-fiber prepreg skins and Nomex/aramid honeycomb cores have been applied to UAV airframe and chassis structures, offering high specific stiffness, low density, and excellent fatigue and moisture resistance. Compared with metallic honeycomb, aramid honeycomb’s formability allows curved and complex interior geometries in sidewall panels, partitions and bespoke cabin parts, without galvanic corrosion risk against carbon-fiber skins.