THERMAL MULTI-CHAMBER AEROSTAT Russian patent published in 2003 - IPC

FIELD: lighter-than-air flying vehicles. SUBSTANCE: proposed aerostat includes nacelle, heat source , inner and outer envelopes secured concentrically, tube for delivery of hot air from heat source to inner envelope which is connected with lower portion of outer envelope. Aerostat is provided with air ducts for heating the nacelle and intermediate envelope whose lower portion is tightly connected with said tube and upper portion is open for passage of hot air from lower cut of inner envelope into outer envelope from whose lower portion said air ducts run. EFFECT: reduced losses of heat. 1 dwg