3/11/2024 0 Comments Cdi sensitivity localizer and vorThe example here shows an aircraft heading away from the Olympia VOR. The selected course, however, is a radial pointing away from the station. When flying outbound from a VOR the same technique applies fly toward the CDI. As a cross reference, the pilot can refer to the magenta ADF needle pointing at a non-directional beacon (NDB), 226 degrees from the present position. As long as the pilot flies straight down the radial, the needle will stay centered. The pilot holds that heading until the CDI begins to center and then intercepts the radial, turning to 340 degrees. There's no need to calculate which way to turn, just turn toward the CDI. The pilot has turned toward the CDI with an intercept angle of about 45 degrees. The CDI indicates that the 340 degree radial of the Seattle VOR is to the left, or west, of the aircraft. The pilot has selected a course of 340 degrees (the green arrow) and, as a reminder, has set the heading bug on 340 degrees. The To/From indicator shows that the aircraft is flying toward the station. Using the HSI in the King Air 350 (shown above), the Seattle VOR is tuned on VOR1 (the instrument can display information for VOR1, VOR2, or the GPS). The small airplane in the center of the HSI always points straight ahead, indicating the direction the aircraft is traveling. (The number of degrees of deflection indicated depends on how far the aircraft is from the ground-based station.) The HSI also has an ADF for cross-reference, and includes a glide slope indicator and scale for ILS approaches. A dotted scale indicates the amount of deviation from course. A course deviation indicator (CDI) shows the position of the selected radial relative to the aircraft’s current position. The heading indicator shows the aircraft’s magnetic heading and its green pointer shows the course the pilot has selected. Let's look at the various components of the HSI. (Not all HSIs are slaved but the HSIs in the Flight Simulator aircraft are.) Related Links The HSI works by combining a VOR/DME receiver and an electrically-slaved heading indicator. Fundamentally, however, all HSIs indicate an aircraft’s horizontal position relative to a selected VOR or ILS. Like other cockpit instruments, HSIs can vary in appearance and operation by brand. The horizontal situation indicator (HSI) was designed to eliminate some of the work of using very-high-frequency omnidirectional range (VOR) navigation and instrument landing systems (ILS).
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |