Simviation Forum - Weird Landing at KBOS

Mar 5^th, 2004 at 1:01pm

YodaNYC Offline
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New York City

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Weather was lousy at Logan this morning ( 800 FT ceiling with heavy rains) so I decided on a full autopilot ILS Landing. As I came out of the clouds, I noticed that I was coming in a couple of degrees to the right of active RWY 15R. Found this strange as I had the APR hold on and the plane seemed to behave normally on final.

Decided to declare missed approach and go around. Unfortunately it happened again the second time around. Anybody have this happen to them on 15R approach at KBOS? Any help appreciated.

Note: Glad to be back on the board...my computer died a few weeks back and I was finally able to rebuild the system. Runs better than ever!

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Reply #1 - Mar 5^th, 2004 at 3:59pm

jrpilot Offline
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Hello,

Did you have the Nav 1 radio set to the proper tune and have it turned on..also did you have it on nav...not gps

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Reply #2 - Mar 5^th, 2004 at 4:09pm

Craig. Offline
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Birmingham

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it may have been an offset ils?

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Reply #3 - Mar 5^th, 2004 at 4:19pm

flyboy 28 Offline
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Jacksonville, FL

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Ugh... ILS... I'll stick with VFR, thank you, very much. Wink

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Reply #4 - Mar 5^th, 2004 at 4:36pm

YodaNYC Offline
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New York City

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Yes...Had the NAV 1 set to correct frequency and dial was set to NAV rather than GPS.

Does anyone have the approach chart for 15R...perhaps that would solve some of the mystery.

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Reply #5 - Mar 5^th, 2004 at 11:13pm

Saratoga Ex Member

C'mon. Real pilots (Not real, but like brave lol) would do it by hand anyways. Hmm...do map view and look at it, see if it's offset, then make sure your heading/nav courses are set to the exact runways heading, then see. The autopilot is probably correcting for wind drift. Turn all the weather off and try it, I bet it works Wink

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Reply #6 - Mar 6^th, 2004 at 6:42am

simone_lux Offline
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Saratoga is right Wink

I love wind and bad weather (in real life as well...) so I tried once to land in hurricane conditions (gusts to 100 kt). The airplane was headed as far as 10 degrees at times, but still going to the runway.

Meteorologist as hobby,&&Simone Lussardi

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Reply #7 - Mar 6^th, 2004 at 11:03am

freightdog35 Offline
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Actually you probably flew the ILS correctly. Some of the BGL files for the ILS's in FS2002 have incorrect data that make the ILS's guide you wrong. Take for instance runway 28L at KCMH, the localizer is off to the right and the glideslope takes you to the other end of the runway. Go to http://perso.wanadoo.fr/hsors/FS_Soft/ ; to get a program called EasyNav that will let you edit those files. For the ILS 15R at KBOS I changed the LOC course to 136.2 and now the localizer is pretty close to center. To fix ILS's like 28L at KCMH you need to do some more work. First go the the airport and select the active runway for the one you want to fix and make this the default flight. turn all the scenery to minimal so the sim loads faster, you will be turning it on and off quite a bit at first. The frequency for 28L is 108.7 and when the sim starts you should be in the middle of the runway but the localizer course is off the the side. If the needle is to the right you need to increase the loc setting in EASYNAV for that ILS. To fix the glideslope, taxi the aircraft just to the right of the runway right beside the touchdown zone markers on the runway. These are the two large rectangle marks about 1,000 feet from the approach end. Hit conrol z to bring up the LAT LONG coordinates. These are the coordinates that sould be in the glideslope entry for the ILS in EASYNAV. There is pretty good info that comes with the program on how to use it. It helps to be familliar with windows explorer and how to save backup files. I hope this helps some and it takes quite a bit of work to fix some of these Nav Aids so I only fix the ones I use the most.

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Reply #8 - Mar 6^th, 2004 at 9:19pm

Saratoga Ex Member

Quote:

Saratoga is right

I have my moments. Tongue

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Reply #9 - Mar 7^th, 2004 at 3:31pm

cerphr Offline
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I have seen that sort of thing in my short tenure as well. I've got a curious event at KALB in a B37 where on left vectors to 8, I have no problem. Coming in from the right is a whole 'nother story for some reason. ???

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Reply #10 - Mar 7^th, 2004 at 5:13pm

Saratoga Ex Member

One thing. Remember some ILSs are set to be off for certain conditions. Check out Aspen airport in Aspen Colorado. It has what's called an Offset LDA, which basically means the ILS doesn't actually go to the runway. If you flew an ILS approach normally into Aspen, you would hit a mountain. Many Offset LDAs are used to direct planes away from cities, landmarks, parks, and obviously, obstacles. These are used in reality, you just gotta know when to turn off the ILS and line up with the runway.

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Reply #11 - Mar 7^th, 2004 at 8:01pm

Nexus Offline
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Saratoga, you're mixing things up.
An LDA approach is NOT part of an ILS approach.
LDA is short for Localizer Directional Aid. And as the name says, you'll track a localizer, which is offset from the actual runway heading.
No glideslope is available, hence making the approach a non-precision approach.

ILS and LDA are two different things.

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Reply #12 - Mar 7^th, 2004 at 9:17pm

cerphr Offline
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Quote:

An LDA approach is NOT part of an ILS approach.
LDA is short for Localizer Directional Aid. And as the name says, you'll track a localizer, which is offset from the actual runway heading.
No glideslope is available, hence making the approach a non-precision approach.

Great example of this is KDCA 19 with an offset at 144. Notorious approach "down the river" into Washington. The real world approach looks like a tapeworm.

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Reply #13 - Mar 7^th, 2004 at 9:46pm

simone_lux Offline
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I agree for the offset ILS, same as it was in the great Kai Tak (Hong Kong) on the approach from the NW to the runway, you have to turn manually (more than 30 degree Shocked

) to land, otherwise you would land in the buildings.

But, in the case of an offset, it is so "obvious" in the GPS map that you cannot mistake Grin

Meteorologist as hobby,&&Simone Lussardi

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