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askop Wrote
PPRuNe Flight Deck Qualified
Posts: 43
Registered: Apr 2000
posted 10 January 2001 18:56
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I`ve used this a lot. Its really drawing, but I`ll try to explain it to you.
First for right turn holdings: Divide your DI or HSI up in the following (clockwise):0-70 deg Teardrop, 70-250 deg Direct and 250-360 Parallell. Place your OUTBOUND holding course in either of the sectors and you`ve got your entry. For left turn holdings its the opposite. 0-110 Parallell, 110-290 Direct and 290-360 Teardrop.
Please correct me if I`m wrong, and please dont call Teardrop for Offset entry (even if JAA discovered flight).
Good luck
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I call this the tumb rule.
Draw yourself first on paper an Heading Indicator (HI)with your current track pointing up.
Now for a left holding pattern take your left tumb en place it on the HI on the left side just above the 90 degrees position. Measure 20 deg. up. Now draw a line from that point through the center of the HI to the other side. It will end at the other 90 deg. side + 20 deg.
So for example if North is up the line will run from the 290 hdg to the 110 hdg.
Now see what the outbound track is. Is your outbound track between, in our example, 290-000 than the entry is Offset (Teardrop). If the outbound track is between 000-110 the entry is Parallel. The rest 110-290 (over right) is Direct.
For a Right hand holding pattern take your Right tumb. Rest is the same.
Make sure you take your outbound track for finding out what kind of entry you need.
Further use your entry trck to find out what for an entry you are getting. Because the heading can differ 10 deg. or more from your track.
The best thing you can do is set your entry track on the Nav indicator. and than use this tumbrule.
I hope this is readable for you.
Good luck on your v-ride.
RadialCaptain