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Glide slope dead (Read 11661 times)

dt Full Member Offline Posts: 13 Location: Finland Joined: Jun 17^th, 2012	Glide slope dead Jul 1^st, 2012 at 8:55am	Print Post
	Sometimes on ILS approach glide slope deviation shows 'above G/S' constantly on approach. I could follow it to the ground and still be 'above G/S' on approach. Problem seems to be random. I took off from Heathrow (EGLL), flew to Manston (EGMH) with GPS DirectTo, activated GPS vectors to final on 28 and did ILS approach with autopilot. Glide slope was showing proper reading and autopilot followed ILS perfectly. Go around and repeat with hand flying and same result - glide slope showing proper reading. Then flew back to Heathrow with GPS DirectTo, activated GPS vectors to final 27L. This time glide slope was constantly showing 'above G/S', even though I was below or at glide slope. i1198.photobucket.com/albums/aa457/depenthene/egllgs1.jpg i1198.photobucket.com/albums/aa457/depenthene/egllgs2.jpg Checked Heathrow ILS with slew and got correct glide slope. I had same problem in various different airports too (PHNL, KORD, PANC, EFHK), but problem is not probably the airports since never had problem with other aircraft on glide slope. I can't seem to recreate problem or circumstances leading to it. Anyone else experience anything like this?


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windplayer Senior Member Offline Posts: 568 Location: Izhevsk, Udmurtia, Russia Joined: Aug 5^th, 2011 Gender:	Re: Glide slope dead Reply #1 - Jul 1^st, 2012 at 10:23am	Print Post
	Something new to me. But most of my day time landings with good weather i do by PAPI\VASI lights. I'll check it.


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CoolP Senior Member Offline Posts: 2568 Joined: Jan 17^th, 2010 Gender:	Re: Glide slope dead Reply #2 - Jul 1^st, 2012 at 6:42pm	Print Post
	dt wrote on Jul 1^st, 2012 at 8:55am: Anyone else experience anything like this? Not yet. Looks like a tricky thing with that random occurrence.


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dt Full Member Offline Posts: 13 Location: Finland Joined: Jun 17^th, 2012	Re: Glide slope dead Reply #3 - Jul 1^st, 2012 at 7:31pm	Print Post
	Had same problem doing ILS to EFHK 15, but glide slope became active during on final. I did switch momentarily AP to AUTO GS, but not sure it was the thing that fixed the problem. Looking more into it.


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CoolP Senior Member Offline Posts: 2568 Joined: Jan 17^th, 2010 Gender:	Re: Glide slope dead Reply #4 - Jul 1^st, 2012 at 7:48pm	Print Post
	Perhaps you need to toggle the AP mode once. Lou mentioned that before. This forces a reinitialization of that system. Read this post on the details with that internal timer while using AUTO. http://www.captainsim.org/yabb2/YaBB.pl?num=1234458523/65#65 It's related to the 727, but I guess the 707 AUTO and MAN thingy acts in the same manner. LOU wrote on Oct 28^th, 2010 at 2:50am: Once the ILS is captured by the autopilot a timer starts in the autopilot. As the aircraft gets closer to the runway the LOC and G/S get more sensitive. Boeing designed the glide slope to begin desensitization as the plane would get closer to the runway. In the 727-100 this was based on time. (the 727-200 used the radar altimeter - much better! Did not need to use this procedure.) So, if you are on an extended (long) final and you have intercepted the ILS at a higher altitude the G/S would need to be re-sensitized during the approach. Here is how you do this: While in AUTO G/S and on LOC and G/S, you select a non radio mode - HEADING SELECT, then select MANUAL G/S quickly by pushing down on the switch and move to MANUAL G/S. Folks, this is way too detailed for this simulator. Just don't fly too long a final and intercept at a higher altitude. You can fly a 50 mile LOC (done sometines in KLAX or KLAS) just don't select AUTO G/S until 7 or 8 miles out. I hope this information helps. It's a bit technical, but simmers like myself enjoy the detail. I find this CS-727 to be a blast and a lot of fond memories of the old plane which was always fun to fly. Remember this is a "game" not a multi-million dollar simulator. I think it's a great simulation and it flys pretty much like the real thing which was not CAT-II. Give it a try and don't rush the approach and it will do a good job. Lou


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dt Full Member Offline Posts: 13 Location: Finland Joined: Jun 17^th, 2012	Re: Glide slope dead Reply #5 - Jul 1^st, 2012 at 8:11pm	Print Post
	CoolP wrote on Jul 1^st, 2012 at 7:48pm: Perhaps you need to toggle the AP mode once. Lou mentioned that before. This forces a reinitialization of that system. Read this post on the details with that internal timer while using AUTO. http://www.captainsim.org/yabb2/YaBB.pl?num=1234458523/65#65 It's related to the 727, but I guess the 707 AUTO and MAN thingy acts in the same manner. Thank you for the information. Have to try play with AP on approach, if I only could figure out what circumstances causes the problem to appear. Never had same problem with CS727 or 737, could be FSX problem too.


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LOU Beta Team Offline 727,707,747,757,767= 40years of Boeings Posts: 1594 Location: Central PA, USA Joined: Mar 3^rd, 2010 Gender:	Re: Glide slope dead Reply #6 - Jul 1^st, 2012 at 8:47pm	Print Post
	Most of the time any of the planes do a good job of tracking the LOC & G/S. I say most of the time because every so often a fruitron gets lost and all the other fruitrons seem to get tired as well. When this happens, I do what the guy did in the video CoolP posted in general section. � Lou *Is this your instillation?* � I'm just asking... � Uploaded with ImageShack.us

	Processor: Intel Core i7-4770k @3.5Ghz Memory: 6Gb DDR3 1600mhz Video: NVIDIA GeForce GTX 680 Storage: 256Gb Samsung 840 Pro \| 120Gb OCZ Agility 3 \| WD Black 640Gb 7200rpm 55" Samsung LED - HDTV for monitor
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CoolP Senior Member Offline Posts: 2568 Joined: Jan 17^th, 2010 Gender:	Re: Glide slope dead Reply #7 - Jul 1^st, 2012 at 9:10pm	Print Post
	Yeah, looks like my last one.


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Markoz CS Team Offline Posts: 12375 Location: Victoria, Australia Joined: Apr 24^th, 2009 Gender:	Re: Glide slope dead Reply #8 - Jul 2^nd, 2012 at 3:59am	Print Post
	LOU wrote on Jul 1^st, 2012 at 8:47pm: *Is this your instillation?* � http://img801.imageshack.us/img801/6263/messq.jpg I'm just asking... � Uploaded with ImageShack.us Yikes! My wife would have me "drawn and quartered" if my computer looked like that!

	Mark Fletcher PC: i7 10700K @3.8/5.1GHz \| 64GB DDR4 3200 \| 12GB RTX 4070 Super \| 32" LCD Monitor \| 1TB SSD & 2x2TB SSD \| Win 11 Pro - FSX/FSX-SE/P3D3/P3D4/P3D5/P3D6/MSFS2020 15.6" Gaming Laptop: i7 7700HQ \| 32GB DDR4 \| 6GB GTX 1060 \| 256GB SSD & 1TB HDD \| Win 10 Pro 64bit - FSX-SE/P3D4
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BrianG Full Member Offline Posts: 205 Joined: Mar 10^th, 2011 Gender:	Re: Glide slope dead Reply #9 - Jul 2^nd, 2012 at 4:43am	Print Post
	DT, I used to have that problem as well. By accident I found the cause was running the AP in Nav mode when using the Doppler or GPS. If I disengage the AP to land by hand while the AP was still in NAV mode, my GS would act exactly as you described. I found the solution was to flip it from Nav Mode to LOC/VOR *before* you disengage the AP. Then the GS would come alive and function as it should. Auto landings worked fine. It was just failing to go from Nav to LOC/VOR before turning off the AP for a manual landing is where the problems would start


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dt Full Member Offline Posts: 13 Location: Finland Joined: Jun 17^th, 2012	Re: Glide slope dead Reply #10 - Jul 2^nd, 2012 at 6:15am	Print Post
	BrianG wrote on Jul 2^nd, 2012 at 4:43am: DT, I used to have that problem as well. By accident I found the cause was running the AP in Nav mode when using the Doppler or GPS. If I disengage the AP to land by hand while the AP was still in NAV mode, my GS would act exactly as you described. I found the solution was to flip it from Nav Mode to LOC/VOR *before* you disengage the AP. Then the GS would come alive and function as it should. Auto landings worked fine. It was just failing to go from Nav to LOC/VOR before turning off the AP for a manual landing is where the problems would start That was exactly the problem and like you said solution was to go to LOC/VOR before disengaging AP. Thank you.


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BrianG Full Member Offline Posts: 205 Joined: Mar 10^th, 2011 Gender:	Re: Glide slope dead Reply #11 - Jul 2^nd, 2012 at 2:18pm	Print Post
	Glad it works for you now. I struggled with that one for a long. Enjoy.


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windplayer Senior Member Offline Posts: 568 Location: Izhevsk, Udmurtia, Russia Joined: Aug 5^th, 2011 Gender:	Re: Glide slope dead Reply #12 - Jul 2^nd, 2012 at 10:21pm	Print Post
	Guys! i just made some circles in 707. Another question appeared. Looks like F\D in NAV\LOC, GS AUTO\MAN turns off GS indicator just like in upper posts. I never used F\D really, and today i wanted to dig it, and thats what i found. Is that supposed to be like that? (I flew by hand)


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LOU Beta Team Offline 727,707,747,757,767= 40years of Boeings Posts: 1594 Location: Central PA, USA Joined: Mar 3^rd, 2010 Gender:	Re: Glide slope dead Reply #13 - Jul 3^rd, 2012 at 1:56am	Print Post
	That is not the way it is supposed to work. I never use the F/D in the 707 or the 727 because there is a bug in there somewhere. Lou

	Processor: Intel Core i7-4770k @3.5Ghz Memory: 6Gb DDR3 1600mhz Video: NVIDIA GeForce GTX 680 Storage: 256Gb Samsung 840 Pro \| 120Gb OCZ Agility 3 \| WD Black 640Gb 7200rpm 55" Samsung LED - HDTV for monitor
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CoolP Senior Member Offline Posts: 2568 Joined: Jan 17^th, 2010 Gender:	Re: Glide slope dead Reply #14 - Jul 3^rd, 2012 at 7:07am	Print Post
	So far, I was happy with the FD on the 707 when on the ILS. In another thread, I took some screenshots and the GS indicator and FD indication worked fine. www.captainsim.org/yabb2/YaBB.pl?num=1315732558/17#17


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