VOR Reciprocals

[MFRskyknight]

The only way to do reciprocals is by learning them just like you learned the multiplication tables. But with reciprocals there are only 18 combos to learn and you probably already know the easy ones like 18-38, 9-27, 2-20 and 13-31. That now leaves just 14 to learn.

My advice is to forget the adding and subtracting methods.

Comments and/or questions are welcome.

18-38?? Hmmm, I don't think we have one of those fancy new VORs in our area yet....

MFR

 

[UndauntedFlyer]

18-38?? Hmmm.
MFR

Used Rwy 38 just the other day.:laugh:

 

[Mr Wu]

Add 200, take 20

 

[phantomdriver]

rwy 38???

18-38?? Hmmm, I don't think we have one of those fancy new VORs in our area yet....

MFR

rwy 38??? I never heard of a rwy 38 before

 

[UndauntedFlyer]

rwy 38??? I never heard of a rwy 38 before

It's coming in the future! We need more runways because of congestion and airport closures.

 

[carlos]

The digits of reciprocals add up to the same number. Examples:
190 - 010, 1+9=10
210 - 030, 2+1=3
330 - 150, 3+3=1+5
360 - 180, 3+6 = 1+8

Several good techniques have been suggested. Try different ones until you find the one that clicks with him.

 

[Say Again Over]

He first needs to completely understand that a radials are FROM the VOR only, telling him to intercept the radial to the station is confusing, how about just telling him to intercept the 123 radial, hopefully he will then have enough understanding to ask you whether to proceed inbound or outbound.

 

[MFRskyknight]

rwy 38??? I never heard of a rwy 38 before

Hey, this is off topic, but in that movie Catch Me If You Can I seem to remember at one point Leo DiCaprio's character looking out the window of the airplane at "runway 44" in LGA. Did this take place before numbers were assigned as magnetic headings, or did Spielberg really crap up here?



MFR

 

[j41driver]

you don't say..that wasa very thoughtful and helpful response.

Perhaps not the most helpful, but true. If he were to study I'm sure he'd have more of a handle on it. Do you disagree? Has he given you any indication as to why he doesn't study? IMO, if a student doesn't put forth any effort to learn this stuff then he's just wasting his time and the instructor's time. Hopefully he's not in it for a career.

 

[antbar]

My experience is that adding anything to anything in the cockpit while under the hood is nearly impossible for a task-loaded student, even if they have a Ph.D. in Mathematics.

I just have them look at the HI/OBS for the heading in question, and then look at the heading opposite that heading... no math required.

There are several good training aids out there (I've used http://www.sportys.com/acb/showdetl.cfm?DID=19&Product_ID=6318&CATID=172 successfully). I just iterate again and again with the student on the ground ("you're heading 310, I tell you to intercept the 015 outbound," while manipulating the needles appropriately), and after hitting their heads against it for a half an hour, you're ready to go try it out in the air or (better) on the sim.