September 10, 201213 yr Hello folks, Getting real close to programming FMC etc. for flights. Currently basic IFR flights etc. One question: I can set the heading on my AP, but the 737 is always off 2 - 4 degrees...just will not go to the heading I've set in AP.... What am I not doing correctly - again, only using FMC for pushback and opening doors. Thanks for helping a newby. Have a blessed day. cthiggin Tom Higginbotham Intel 4820K - OC'd 4.8 ghz / ASUS x79 Deluxe Premium MB, 16 gig Corsair Dominator ram, CorsairRM1000 PSU, Corsair H-105 Liquid, EVGA 770 Classified, 37" Samsung TV/Monitor, Samsung 840 EVO SSD 1TB, WD VRaptor, 1TB
September 10, 201213 yr It's because of the wind. The plane will automatically fly into the wind in order to compensate the cross wing effect and follow the correct track on the ground. George Golas ---------------------- I hate gravity!
September 10, 201213 yr Don't confuse ground track (the path you follow over the ground) with your heading (where the nose is pointed). On the Navigation Display in Map Mode, Track is up, and heading varies with the wind. The small triangle on the ND is the heading. Matt Cee
September 10, 201213 yr Commercial Member Hopefully this helps to explain it a little, in pictorial terms: If you're looking for more in-depth reading, I would definitely take a look here. http://www.free-online-private-pilot-ground-school.com/navigation-principles.html Even if you only glance at the text and then take a look at the illustrations, it'll start making more sense. Kyle Rodgers
September 10, 201213 yr Author Hello gentlemen, THANKS so very much from each of you. I "do" understand now and the compensation. Duh, it only makes sense. Appreciate your help and explainations. Have a blessed day. Tom Tom Higginbotham Intel 4820K - OC'd 4.8 ghz / ASUS x79 Deluxe Premium MB, 16 gig Corsair Dominator ram, CorsairRM1000 PSU, Corsair H-105 Liquid, EVGA 770 Classified, 37" Samsung TV/Monitor, Samsung 840 EVO SSD 1TB, WD VRaptor, 1TB
September 11, 201213 yr I'm practicing wind correction IRL. It's pretty fun to do. Anyway, Tom, you should try flying with the FMC. It's pretty awesome. i7-6700K @ 4.5 GHz, 16 GB DDR4-2400 MHz, GTX 1070 8GB
September 11, 201213 yr Author linux731, FMC study and use is my next step. Thanks so very much and have a blessed day. Tom Tom Higginbotham Intel 4820K - OC'd 4.8 ghz / ASUS x79 Deluxe Premium MB, 16 gig Corsair Dominator ram, CorsairRM1000 PSU, Corsair H-105 Liquid, EVGA 770 Classified, 37" Samsung TV/Monitor, Samsung 840 EVO SSD 1TB, WD VRaptor, 1TB
September 11, 201213 yr Commercial Member I'm practicing wind correction IRL. It's pretty fun to do. Haha - yeah. I was flying some friends back from CHO Sunday and as I was getting closer to JYO, I asked them if they noticed we were flying sideways. I'll have to post the video of the landing later. Kyle Rodgers
September 11, 201213 yr Hi!! When setting up the EFIS panel if you select FPV (the first button to the right of the mins knob) it will show a series of marks on your PFD that depict the values discussed above (thus giving you an indication of the plane's heading deviation from the track to compensate for the wind). It is a good tool for navigation especially on approaches and landings with unusually high winds. Hope it helps PS all this is discussed in the Tutorials, you should really give them a go! Matteo Capocefalo MED1473
September 12, 201213 yr Haha - yeah. I was flying some friends back from CHO Sunday and as I was getting closer to JYO, I asked them if they noticed we were flying sideways. I'll have to post the video of the landing later. It is incredible, isn't it? I have no idea how the heck my CFI knew the direction of the wind. He just told me "turn left heading XXX and fly sideways" LOL. i7-6700K @ 4.5 GHz, 16 GB DDR4-2400 MHz, GTX 1070 8GB
September 12, 201213 yr Commercial Member It is incredible, isn't it? I have no idea how the heck my CFI knew the direction of the wind. He just told me "turn left heading XXX and fly sideways" LOL. Haha. Once you fly long enough, you can pretty easily pick up the direction of the wind from a glance at the ground. Once you identify the crab angle and the perceived difference in speed across the ground, you've determined whether or not the wind is from the left or right, and if it's head or tail. From there, you can infer a very rough wind vector, and how you can turn to have it as a direct head/tail/cross. As an example, I saw that I was being pushed right of course, and I was booking it across the ground, so I had a left quartering tail. A more "exact" way is to look for plumes off of smoke stacks, or some other type of (non-FAA-standard) wind indicator. Kyle Rodgers
September 12, 201213 yr Haha. Once you fly long enough, you can pretty easily pick up the direction of the wind from a glance at the ground. Once you identify the crab angle and the perceived difference in speed across the ground, you've determined whether or not the wind is from the left or right, and if it's head or tail. From there, you can infer a very rough wind vector, and how you can turn to have it as a direct head/tail/cross. As an example, I saw that I was being pushed right of course, and I was booking it across the ground, so I had a left quartering tail. A more "exact" way is to look for plumes off of smoke stacks, or some other type of (non-FAA-standard) wind indicator. Yeah! I should do try that next time. i7-6700K @ 4.5 GHz, 16 GB DDR4-2400 MHz, GTX 1070 8GB
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