formula for crosswind correction in hold

Mavmb

Mavmb

Well-Known Member
Does anybody use this math for crosswind correction in a hold? It seems kind of complicated to try to do while flying?
 
Reminds me of Junior High math.

I did have some very analytical students and I had to do equations for most things for them to understand what was going on. If I had them for instrument training this would have worked out as well.
 
I couldn't watch it all (gives me a headache) but, browsing through it, ultimately he talked about needing 8° correction to maintain the inbound track and therefore expecting a 24° correction for the outbound leg. That's just the basic 3X rule of thumb. And "adjusting a tad" is hardly the height of mathematical computation :D.
It's actually one of the earlier videos in the series that is much more math intensive - using the Pythagorean theory to try to get a precise method of estimating the correction that might be required for the entry other than direct along the inbound course. Unfortunately, even that requires at least DME.
 
image.gif
 
z987k said:
I see a Garmin 400 in the video. It flies holds nicely. Do that. Use your brainpower for things like SA.
Click to expand...

I look at my 430 screen that shows Track vs Desired Track any time I'm in the air. For some reason the 530 doesn't have that feature.

198124_gps_vloc_button.jpg
 
MidlifeFlyer said:
I couldn't watch it all (gives me a headache) but, browsing through it, ultimately he talked about needing 8° correction to maintain the inbound track and therefore expecting a 24° correction for the outbound leg. That's just the basic 3X rule of thumb. And "adjusting a tad" is hardly the height of mathematical computation :D.
It's actually one of the earlier videos in the series that is much more math intensive - using the Pythagorean theory to try to get a precise method of estimating the correction that might be required for the entry other than direct along the inbound course. Unfortunately, even that requires at least DME.
Click to expand...
I find that the same folks who are smart enough to figure out 8* needed for what ever are the same ones who can't hold +/- 10* to save their life.
 
fholbert said:
I look at my 430 screen that shows Track vs Desired Track any time I'm in the air. For some reason the 530 doesn't have that feature.
Click to expand...
Huh??? Are we talking about the same ting?
(The yellow arrow is mine; the picture is the default set-up of the 530).

Temp2.png
 
Last edited:
Itchy said:
I find that the same folks who are smart enough to figure out 8* needed for what ever are the same ones who can't hold +/- 10* to save their life.
Click to expand...
I agree, but I don't think the question is about how much correction is needed to have a good reference heading to keep a courseline centered.
Although the videos deal with GPS, which really makes the whole thing a no-brainer, the underlying problematic issue is the course correction for an outbound leg that is not preceded by flight on the inbound course in which there is no course guidance.

Example: No GPS. In fact, make it no DME either. The hold instructions are to hold southwest of the VOR on the 220° radial. You are heading to the VOR on a course of 340°. Nice basic entry, and in no-wind conditions, you simply turn right to 220° when crossing the VOR for the entry. But add a wind - 130@30. You need to come up with some number to subtract from the 220° in order to avoid being blown closer and closer to the inbound course.
 
You must log in or register to reply here.
Back
Top