(비행꿀팁) 한국항공대학교 기초계기실기 강의 1탄(Intercept radial, Arc)

Summary

The video is an introductory instrument-flying lesson on intercepting a VOR radial and flying a DME arc. Using instrument diagrams and worked examples, the instructor explains course setup, turn anticipation, arc tracking, and how to leave the arc. Some phrases and numbers in the auto-generated subtitles are garbled, so this summary focuses on the clear procedural points.

1. Intercepting a radial

• Memorize two basic intercept-angle rules:
  • Inbound: use an intercept angle of about 30°.
  • Outbound: use an intercept angle of about 45°.
• Before turning, identify the aircraft’s position and the required radial or course, then set the navigation instrument accordingly.
• Use the RMI and CDI/course indication to determine the turn direction and whether the aircraft is converging on the desired course.
• Choose a suitable heading to intercept the course rather than turning directly onto it immediately.

2. Understanding and entering a DME arc

• Fly an arc by maintaining a roughly constant DME distance from the station while progressing around it.
• Identify whether the situation is inbound or outbound, and set the navigation instruments for the relevant radial and course.
• Before reaching the arc, anticipate the turn using a lead calculation based on groundspeed. The captions refer to a 0.6 factor and show a worked example, but the exact formula is not reliably transcribed.
• The lesson also discusses using a lead radial to leave the arc. In the example, the calculated value is rounded to roughly 2.5–3°, though the captions are not clear enough to establish the precise calculation.
• During the turn and while flying the arc, monitor the RMI, CDI, heading, and DME together. Make small heading adjustments to stay near the target distance.
• The instructor demonstrates making course or heading changes in small increments. One suggested practice approach is to use adjustments of about 5° either side; other instructors may prefer a different technique, such as working between 0° and 10°.

3. Leaving the arc

• The exit procedure depends on whether the clearance is inbound or outbound. Use the requested final radial and anticipate the turn rather than waiting until reaching the exact exit point.
• The instructor’s practical cue is to use the RMI needle:
  • For an inbound exit, turn toward the RMI head.
  • For an outbound exit, turn toward the RMI tail.
• Continue monitoring the CDI and course setting as the aircraft turns onto the exit path.
• First identify whether the situation is inbound or outbound, since the two cases can look different on the instruments. Then apply the corresponding turn direction.

Main takeaway

Set up the instruments deliberately, anticipate turns with lead calculations, make small corrections while tracking the arc, and use the RMI head or tail to help identify the correct exit turn. The video briefly previews a later lesson on holding procedures.

Speakers and sources featured

• Kim, the instructor presenting the lesson. The video context identifies him as associated with Korea Aerospace University and the CallSign71 channel.
• No other clearly identifiable speakers are featured.