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VOR problem (Read 9415 times)

boeing247 Senior Member Offline Pilots: Looking down on people since 1903 Posts: 1506 Location: Southern CA Joined: Feb 23^rd, 2011 Gender:	VOR problem Jul 22^nd, 2011 at 3:30am	Print Post
	This was originally a problem I noticed with the 727, but I realized that it is not the aircraft, but a simulator issue. No matter what VOR I'm flying, the course given to me by my VOR indicator is slightly off from the actual course on the GPS (correct heading, but wrong positioning). This occurred on my old system and has not stopped on my new one. Is VOR navigation supposed to be a bit off? Does anybody else have this problem? Thanks, boeing247

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LOU Beta Team Offline 727,707,747,757,767= 40years of Boeings Posts: 1614 Location: Central PA, USA Joined: Mar 3^rd, 2010 Gender:	Re: VOR problem Reply #1 - Jul 22^nd, 2011 at 3:19pm	Print Post
	boeing247, Here is a screen capture of the CS 707 on airways to the EMI VOR. All looks normal on the VOR display and the GPS. Lou Uploaded with ImageShack.us

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boeing247 Senior Member Offline Pilots: Looking down on people since 1903 Posts: 1506 Location: Southern CA Joined: Feb 23^rd, 2011 Gender:	Re: VOR problem Reply #2 - Jul 22^nd, 2011 at 5:02pm	Print Post
	So you've never had any problem like this?

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LOU Beta Team Offline 727,707,747,757,767= 40years of Boeings Posts: 1614 Location: Central PA, USA Joined: Mar 3^rd, 2010 Gender:	Re: VOR problem Reply #3 - Jul 22^nd, 2011 at 6:36pm	Print Post
	No, not as you are describing. But in the older planes such as the 727 & 707 I do not use a GPS, only VOR's. Yet, as you can see the VOR and the GPS are lined up. Maybe Mark can shed some light since I think he uses GPS in the old birds. Lou

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boeing247 Senior Member Offline Pilots: Looking down on people since 1903 Posts: 1506 Location: Southern CA Joined: Feb 23^rd, 2011 Gender:	Re: VOR problem Reply #4 - Jul 23^rd, 2011 at 4:38am	Print Post
	I don't use the GPS in old planes, but I was vectored back on course by ATC, so I checked the GPS and I was one or two (sometimes more, depending on the VOR) off course event when the HSI said I was perfectly fine. Also, this is occurring on modern prop planes, too.

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Markoz CS Team Offline Posts: 12453 Location: Victoria, Australia Joined: Apr 24^th, 2009 Gender:	Re: VOR problem Reply #5 - Jul 23^rd, 2011 at 8:47am	Print Post
	LOU wrote on Jul 22^nd, 2011 at 6:36pm: No, not as you are describing. But in the older planes such as the 727 & 707 I do not use a GPS, only VOR's. Yet, as you can see the VOR and the GPS are lined up. Maybe Mark can shed some light since I think he uses GPS in the old birds. Lou That's nice to know Lou. When boeing247 first brought the subject up a while ago, I had the exact same problem as he did. I was offtrack by up to 2 miles and increasing. The VOR showed that it was following the track, but even when I tried it with no winds (Clear skies), you could see it wasn't going to go over the VOR. It was definitely going to miss. By more that two miles! Mark

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LOU Beta Team Offline 727,707,747,757,767= 40years of Boeings Posts: 1614 Location: Central PA, USA Joined: Mar 3^rd, 2010 Gender:	Re: VOR problem Reply #6 - Jul 23^rd, 2011 at 2:58pm	Print Post
	Try something for me... Find a VOR that you can see or find from the air. On VFRMAP.com plot a radial to another VOR that is not too far away, lets say 40 to 60 miles. Fly the radial from one VOR to the other using the plotted radial and see if it takes you right over the second VOR. I did just that, and here is what I found. I plotted a course from the OTT VOR to the SBY VOR. The radial from OTT is 120 degrees. When the needle indicated station passage I froze the sim and took these captures. The GPS is dead on as is the VOR. The depiction of the plane in the GPS is facing the wrong way because I hit the "Y" key to bring the plane down in altitude. The distance from OTT to SBY is about 50 miles. At 60 miles, one degree is one mile wide. I have not seen a problem with the VOR vs GPS. Lets see what you all find. Lou Uploaded with ImageShack.us

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701151 Senior Member Offline Delta 737-200 Posts: 1009 Location: UNITED STATES Joined: Jan 29^th, 2011 Gender:	Re: VOR problem Reply #7 - Jul 23^rd, 2011 at 3:20pm	Print Post
	Lou is that just a black 727?


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LOU Beta Team Offline 727,707,747,757,767= 40years of Boeings Posts: 1614 Location: Central PA, USA Joined: Mar 3^rd, 2010 Gender:	Re: VOR problem Reply #8 - Jul 23^rd, 2011 at 6:05pm	Print Post
	That is my super stealthy 727-100 ! � No Peter, it is indeed black. That happens sometimes when I pop in and out of FSX and use several other programs at the same time. Lou

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boeing247 Senior Member Offline Pilots: Looking down on people since 1903 Posts: 1506 Location: Southern CA Joined: Feb 23^rd, 2011 Gender:	Re: VOR problem Reply #9 - Jul 25^th, 2011 at 12:15am	Print Post
	I've found something interesting: while flying, I was looking at the HSI, which was directing me off-course. I hadn't looked at the VOR indicator, which was giving me the correct course. Here's the screenshot, it's actually from a Cessna C340, not the 727. (Does the 727 have a VOR indicator like this, or is it just the HSI?)

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LOU Beta Team Offline 727,707,747,757,767= 40years of Boeings Posts: 1614 Location: Central PA, USA Joined: Mar 3^rd, 2010 Gender:	Re: VOR problem Reply #10 - Jul 25^th, 2011 at 1:49am	Print Post
	boeing247, are these displays from two different VOR's? If so, could be one of your VOR's needs to be calibrated. � Just asking??? Lou Uploaded with ImageShack.us

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boeing247 Senior Member Offline Pilots: Looking down on people since 1903 Posts: 1506 Location: Southern CA Joined: Feb 23^rd, 2011 Gender:	Re: VOR problem Reply #11 - Jul 25^th, 2011 at 1:52am	Print Post
	No, they're the same. I have both VHF radios tuned to the same frequency.

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LOU Beta Team Offline 727,707,747,757,767= 40years of Boeings Posts: 1614 Location: Central PA, USA Joined: Mar 3^rd, 2010 Gender:	Re: VOR problem Reply #12 - Jul 25^th, 2011 at 2:37am	Print Post
	You miss the point, you have two radios and two displays...... which one is feeding which instrument. That is why I used two different colors. Usually, one radio feeds the HSI and the other feeds the second VOR dial. Lou

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boeing247 Senior Member Offline Pilots: Looking down on people since 1903 Posts: 1506 Location: Southern CA Joined: Feb 23^rd, 2011 Gender:	Re: VOR problem Reply #13 - Jul 25^th, 2011 at 2:54am	Print Post
	No, I see what you're saying, I think I just phrased my response incorrectly. Yes, the top one controls the HSI and the bottom one controls the VOR indicator. However, they are bothed tuned to the same VOR station.

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Markoz CS Team Offline Posts: 12453 Location: Victoria, Australia Joined: Apr 24^th, 2009 Gender:	Re: VOR problem Reply #14 - Jul 25^th, 2011 at 3:45am	Print Post
	LOU wrote on Jul 23^rd, 2011 at 2:58pm: Try something for me... Find a VOR that you can see or find from the air. On VFRMAP.com plot a radial to another VOR that is not too far away, lets say 40 to 60 miles. Fly the radial from one VOR to the other using the plotted radial and see if it takes you right over the second VOR. Hi Lou. I did a similar flight with the 727 yesterday. It worked perfectly. Mark

	Mark Fletcher PC: i7 10700K @3.8/5.1GHz \| 64GB DDR4 3200 \| 12GB RTX 4070 Super \| 32" LCD Monitor \| 1TB SSD + 2TB SSD + 2TB HDD \| Win 11 Pro
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