PPRuNe Forums - View Single Post - Lead Radil To Intercept From Arc To Radial
Old 10th December 2009 | 09:37
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deeceethree
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rsaf1,

I realise that english is probably not your first language (but good effort, well done!) so I will try to keep this simple.

An ILS does not have any radials like a VOR. However, I think you are asking if the principle of turning from an arc approach onto an ILS localiser is the same as turning from an arc approach onto an inbound VOR radial? The answer would be yes.

However, unless you have an airfield where a VOR is situated close to the ILS, to give you lead radials for your turn on to the ILS, then you need to devise some other method to warn you to begin the turn. I believe that is what the other posters are doing for you on this thread. When using such methods you may also need to account for the wind, particularly if it is very strong. For example, if a strong wind is coming from behind you, as you turn you turn on to the localiser or VOR radial, you may be pushed past the localiser/radial.

None of the methods is perfect, and it depends on the speed of your aircraft, and if any strong winds are affecting the turn. Only time (practise and experience) will let you know what works for you.
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