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How to calculate counter-radials

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  • Commercial Member

Jim, that one is easy, just add 270 (180+90) to your Rwy hdg 26 degrees and voilà! 296!

 

Jean-Jacques

 

So I'd still do (270+20)+6=296 , I'm perpetually programmed to do it that way, lol. And you're right that's probably the best way.

 

Sometimes I think it's easier to just look out the left window and note what's there, then turn left until it's in the front window :lol:

Just like you do minus 200 plus 20 or plus 200 minus 20, for crosswind legs, I do minus 100 plus 10 or plus 100 minus 10.

 

IAN

Ryzen 5800X3D, Nvidia RTX5080 - 32 Gig DDR4 RAM, 1TB & 2 TB NVME drives - Windows 11 64 bit MSFS 2024 Premium Deluxe Edition Resolution 2560 x 1440 (32 inch curved monitor)

I think the runway pair combo is the easiest... of course I know them all by memory now.  But to be clear let's say you want the reciprocal of 117 radial.  Round up to 120 (then drop the zero to see what runway you're thinking of).  The other end of a Ry 12  is Ry 30.  Subtract 3 degrees from 300 (Ry 30) and you get 297.  You can also quickly crosscheck because you know Ry 11 is also 29 (think ry 117 reciprocal of 297).

 

But yes visual aids are great like an HSI etc.  Even on a Boeing style EHSI there should be a full compass option OR arc.  I can't think of a plane that would only have an arc option available.

My Liveries | FAA ZMP | PPL ASEL |
| Windows 11 | MSI Z690 Tomahawk | 12700K 4.7GHz | MSI RTX 4080 | 64GB 6000 MHz DDR5 | 500GB Samsung 860 Evo SSD | 2x 2TB Samsung 970 Evo M.2 | EVGA 850W Gold | Corsair 5000X | HP G2 (VR) / LG 27" 1440p |

 

 

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