How do you enter hold using tear drop entry in a jet?!
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Join Date: Dec 2007
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How do you enter hold using tear drop entry in a jet?!
If you enter holding pattern using tear drop entry method it is not possible to turn back in that space provided by 30 degrees!!! It takes for ever to make a turn at 25 bank angle!
I use simulator, but it should be accurate. Say FL200, speed 265 knots, hold on 330 radial, right turns. If I start tear drop entry on 300 radial going outbound for 1.5 minute and I start right turn. It takes ages to make a turn and this speed and 25 degrees of bank. By 330 radial nose points near 90 degrees of!
Even speeds like 200 knots don't work as TAS is high and radius depends on TAS. Around 140 knots is required and that's probably slower than stall speed!
I use simulator, but it should be accurate. Say FL200, speed 265 knots, hold on 330 radial, right turns. If I start tear drop entry on 300 radial going outbound for 1.5 minute and I start right turn. It takes ages to make a turn and this speed and 25 degrees of bank. By 330 radial nose points near 90 degrees of!
Even speeds like 200 knots don't work as TAS is high and radius depends on TAS. Around 140 knots is required and that's probably slower than stall speed!
Join Date: Aug 2014
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Doesn't pilots use the easiest method to enter a hold? So why not use the easiest method without complicating things further? How about direct entry of parallel entry...
The speed of 265 knots You mention strikes me as rather high for a holding. You will end up with a way smaller turn radius if You use lower, more typical holding speeds. Do try the green dot speed (Vy if I remember correctly), this will not only make the entry easier but also provide remarkable fuel savings and therefore a way longer endurance. All good things to have when holding...
How often do you have to do a sector entry above FL200 though? We are lucky enough not to have to do much enroute holding in Australia, but when I have it has always been a direct entry because the holding pattern is aligned with the airway.
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There is no requirement that you be established on the 330 radial inbound on your first turn. Your offset is to get you positioned so that as you come over the fix a rate one turn will place you correctly. The moment you come over the fix from your offset maneuver is when you are entering the hold and it is from that point that you should be able to fly the correct pattern.
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I'm not surprised it takes forever as your ground speed is likely to be around 370 Kts. Get the speed down to minimum clean and you will use considerably less space. But the more interesting question is why are you holding at this level and speed?
Max speed for FL200(inclusive) is 240kts ;zone of `flexibility +- 5* on radials`..
