PPRuNe Forums - View Single Post - Intercepting radials and QDM/QDR
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Old 23rd Jul 2011, 14:57
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aviator_88
 
Join Date: Dec 2010
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wow....well that's really simple. Now, get this. It is called KLM method for interception.

Method is different whether you are looking for inb or outb. track.

DQDR - desired QDR (one that you need to go to)
PQDR - present QDR (one that you are right now)
IA - intercept angle in relation to DQDR
*QDR for NDB, radials for VOR

the rule:

if DQDR-PQDR > 90 then a/c track same as DQDR until DQDR-PQDR=90 (abeam)
if/when DQDR-PQDR < 90 but >20 then a/c track IA= 60 until DQDR-PQDR=20
if/when DQDR-PQDR < 20 then a/c track IA= 30 until closing to DQDR

there is a lot of calculations and you need to apply corrections for adf needle if there is strong wind. This method is hard to learn but once you master it you won't lose spatial awareness easily...and it gets more complicated with QDM/inb.courses

Anyway, I am asking this because I don't know whether to use it on sim assessment or not. I wouldn't like some chief pilot or whoever asking me; whaaat the hell are you doooin' boy?!!
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