DRAIN MAST BAY auxiliary power unit AIRCRAFT

摘要

1. Drain mast (13) for draining fluids from a compartment (11) of the aircraft APU with a first end (15) connected to the compartment (11), the APU and a second end (17) for ejecting said liquid to the atmosphere, characterized in that drain mast (13) is configured at least with the sector having the cross-sectional area decreasing toward the second end (17), and in that the entry cross section of said area of ​​the sector is less than the area of ​​any cross section drain mast (13) , closer to the first con zu (15) .2. Drain mast (13) according to claim 1, wherein the entire drain mast (13) has a cross sectional area decreasing towards the second end (17) .3. Drain mast (13) according to claim 1, wherein the drain mast (13) is configured in a bent shape air flow direction, and wherein said sector is the terminal fitting (51) .4. Drain mast (13) according to claim 1, wherein said sector is the sector of the outlet (21) at the end of the drain mast (13) .5. Drain mast (13) according to claim 4, wherein the drain mast (13) is arranged at an acute angle (α) relative to a horizontal plane at said first end (15) in the direction of flow vozduha.6. Drain mast (13) according to claim 5, wherein said outlet section (21) comprises an inner barrier (31, 33) .7. Drain mast (13) according to claim 6, wherein the inner barrier (31) completely blocks the cross-sectional portion along the bottom wall (20) of the outlet sector (21) .8. Drain mast (13) according to claim 7, wherein the ratio between the final and initial cross-sectional areas of the exhaust sector (21) is between 0,5-0,8.9. Drain mast (13) according to claim 6, wherein the inner barrier (33) dividing