초록 ▼

A cylindrical roll drum housing (12) is mounted to the roof (18) of an aircraft fuselage. Enclosed in the housing (12) is a sensor (22) that pivots about an azimuthal axis (82). The sensor (22) normally looks outwardly through sliding window (20) that moves back and forth in correspondence with sens

A cylindrical roll drum housing (12) is mounted to the roof (18) of an aircraft fuselage. Enclosed in the housing (12) is a sensor (22) that pivots about an azimuthal axis (82). The sensor (22) normally looks outwardly through sliding window (20) that moves back and forth in correspondence with sensor pivoting. Pressurized air is blown directly across the window\s opening (40), and is also blown directly into the housing (12). The window (20) has an inwardly directed airflow-deflecting edge which, in combination with the air blowing, is used to control boundary layer vortices across the window\s opening so that they do not interfere with sensor properties.

대표청구항 ▼

An improved roll drum housing for use on board an aircraft, said housing having a hollow cavity in which is received a sensor apparatus, said housing being rotatable about a roll axis that is generally parallel to the flight path of said aircraft, wherein said sensor apparatus rolls about said axis

An improved roll drum housing for use on board an aircraft, said housing having a hollow cavity in which is received a sensor apparatus, said housing being rotatable about a roll axis that is generally parallel to the flight path of said aircraft, wherein said sensor apparatus rolls about said axis correspondingly with drum housing rotation, said sensor apparatus further being independently pivotable in said housing about a separate azimuthal axis, the improvement comprising: a window frame opening in a sidewall of said housing; a window frame member slidably positioned across said opening, said frame member having a window aperture which provides said sensor apparatus with a view from inside to outside said housing; means for sliding said window frame member back and forth in a direction generally parallel to said roll axis, said sliding means being operatively connected to said sensor apparatus in a manner so that said window sliding occurs correspondingly with azimuthal pivoting of said sensor apparatus, so that said window aperture is continually positioned to permit said sensor apparatus with a view outside said housing as said apparatus changes azimuthal positions in said housing.