| 摘要 |
FIELD: aeronautical engineering; designing rotary-wing vehicles. SUBSTANCE: proposed helicopter is provided with auxiliary power plant including fuel-and-oil heat exchanger, electric starter and generator. Compartment of auxiliary power plant is provided with additional air intake for cooling the generator and air exhaust branch pipe is mounted at cooling system outlet. Exhaust branch pipe of engine forms together with external tube coaxial pair of tubes; external tube is secured on cowling projecting beyond exhaust branch pipe, thus forming ejector whose inter-tube passage is communicated with compartment of auxiliary power plant. Oil inlet and outlet of fuel-and-oil heat exchanger are connected with oil system of engine; fuel is fed to respective inlet of heat exchanger from service tank via pipe line by means of fuel pump; heated fuel outlet is connected with fuel tank venting main. Engine may be secured on brackets by means of pair of rods and shackle; box-shaped additional air intake mounted on cowling is formed by fireproof bulkhead on one side and by wall of receiver on other side; receiver may be have hole for communication with air intake of auxiliary power plant engine. EFFECT: enhanced safety of flights due to increased altitude of starting engines of main power plant; increased time of emergency flight with working engine of auxiliary power plant. 4 cl, 6 dwg |
