Adjusting the ILS heading

[SubLogical]

Enjoying this discourse very much and learning tons.

A few pics with comments ... (I hope I'm not abusing the server upload restrictions ... if so let me know and I'll switch to dropbox links)

1) CYKA ILS ... this is the birds view of the valley and the approach red lined from the 26 threshold to the IAF "Vomad" drawn in at 264 degs +/- line width etc.

2) SkyVector ... seems to believe in the 084/264 rwy hdgs and the magvar of 19 degs. Interestingly Google will bring up authorities that suggest 16.30 ... but if I read Jon correctly FS won't accept any change in the magvar of 19 so I changed the True heading from 285.0000 to 283.0000 in an effort to duplicate the 264 hdg which seems to have worked. See next pic.

3) 1.6 miles out (must include the 8000 ft to the DME) ... It looks to me like the magic number might in fact be 285 degs for a centreline td and I may play with that a bit more although the pilot should have it manually by this range. This approach is quite tight at the beginning and then it's clear sailing. The MSA's are well above the peaks but this is probably because we are on one of the main routes from the Enderby VOR pointing due west through YKA NDB and I don't know this but I think that's why YKA NDB is there in the first place.

4) Recent Flight Supplement ... amazed to find out there was a new ILS for the 08 rwy and a new NDB (YZA) on a ranch on the right hand side coming in to 26. They also confirm the 264 hdg is correct vs the Jeppesen 266.

The new GS worked fine but I wonder if the sensor should be moved closer to the center of the airport since the approach pic shows 4 whites and 1.6 miles to go ...

My wife tells me that little old CYKA now calls itself Kamloops "International" which must be because of the Horizon flights bringing all the skiers here in the season . Although it's paradise, I can't imagine it being an International hub!!!

Thanks again and please let me have any thoughts I should consider.

Ken

 

[Lane Street]

2) SkyVector ... seems to believe in the 084/264 rwy hdgs and the magvar of 19 degs. Interestingly Google will bring up authorities that suggest 16.30 ... but if I read Jon correctly FS won't accept any change in the magvar of 19 so I changed the True heading from 285.0000 to 283.0000 in an effort to duplicate the 264 hdg which seems to have worked. See next pic.

I am surprised the airport chart doesn't have a mag var indicator on it, probably due to the source not being NAVCAN.

I suspect SkyVector took the magvar of 19 degrees from a chart that looks like...

...where you can see the 2003 value is 19 degrees and to get the current value you have to do the math and apply the annual rate of change.

12 years x 12 minutes/year= 144 minutes or 2.4 degrees makes the current magvar 19-2.4=16.6 degrees.

3)The new GS worked fine but I wonder if the sensor should be moved closer to the center of the airport since the approach pic shows 4 whites and 1.6 miles to go

It is not uncommon for the glideslope to not match the visual indicators.

If you move the glideslope transmitter closer to the middle of the runway, and further from the approach end, you will raise the plane of the glideslope at the threshold making the situation worse.

The glideslope transmitter is usually next to the landing blocks.

You could also adjust the pitch of the PAPI lights.

4) Recent Flight Supplement ... amazed to find out there was a new ILS for the 08 rwy and a new NDB (YZA) on a ranch on the right hand side coming in to 26. They also confirm the 264 hdg is correct vs the Jeppesen 266.

If you are referring to the Jepp chart that you posted, that course was correct in 2004 when that chart was current.

My wife tells me that little old CYKA now calls itself Kamloops "International" which must be because of the Horizon flights bringing all the skiers here in the season . Although it's paradise, I can't imagine it being an International hub!!!

Any airport that has Customs services is technically an international airport.

Even the little Kenmore Air terminals on Lake Union and Lake Washington are international airports, though they aren't named that way.

cheers,
Lane

 

[SubLogical]

Hi Lane,

I'm finding the GS quite "iffy" and I think I'm going in over top of it. The approach starts at 8000 ft at Felco and I can't really drop much till I'm on Vomad which is in the valley. Should I be monkeying with the GS angle? I had it set at 3.5 and got that one good showing in the pic, then went up to 5 thinking that would help raise the intercept level but quickly pulled back fearing that high number would be more for cliff divers.

Thank your for your many helpful thoughts ... if you have one in your bag for the GS I think I can put this delicious thread to bed and get on with the ILS I didn't know existed ... WestJet must have had their revolver on the table during negotiations!

Ken

PS I miss the Seattle boat show, Lunch at "FX McRory" and dinner at "Canlis" ... "those were the days my friends, we thought .....!

 

[Lane Street]

mmmmmmmmmm......Canlis......

Where was I?

Oh, glideslope angle. I would let the terrain dictate the glideslope angle.

With the standard ILS range of 27 miles, the glideslope comes active at about 21.5 DME [added]when the DME is co-located with the localizer. If the DME is elsewhere this distance is probably different.[/added]

At that point you need to be far enough below the glideslope to have time to react to it.

Otto needs to be below the glideslope to capture it, so you could conceivably be 100 feet below the glideslope when it becomes active and Otto would lock on it.

Hand flying would require more of a buffer.

FWIW, I decided to see how a certain payware developer has dealt with Kamloops Intl. I was surprised to see that they not only do not have the runway extension, they also moved the localizer to an incorrect position, in line with and sharing the heading of the runway centerline.

They had moved the runway a bit to the south, about a runway's width, and kept the same heading.

I added a 3.5° glideslope (I start with the point of the glideslope indicator in ADE centered on the landing blocks) and flew into Kamloops, landing on the ILS.

I tested both default scenery and that developers addon scenery and felt comfortable with both. The last hill on the right before you get to the confluence of the North Thompson and the Thompson was a little close, though that close to the airport you would want to be on the localizer or going around.

Anywho, set the GS pitch as shallow as you can and still capture the GS with sufficient ground clearance. Most ILS seem to be ~3°.

cheers,
Lane

[edit]
forgot to add, I don't know if changing the ILS range will affect the range of the GS, might be something else to try.
[/edit]

 

[SubLogical]

Canlis ... at the top of the hill looking out over the lake ... long gone but probably the best restaurant (except home) I've ever enjoyed.

OK and thanks on all of the above. Both ends are working well and I'm just wrestling with changing the ILS for 08 to 26's - 180 which should be OK as it makes the runway straight???? I tested it a couple of times and it wants 085 instead of 084 and I'll see if the aforementioned (isn't that word a beauty) change puts it all to bed.

Can't thank you enough so will just say thanks.

Interesting about the payware. That hill on your right is named Mount Paul and the slighter higher peak upriver but adjoining is Mount Peter. It must have had some religious connotations ... weren't they apostles... The geology of Paul is amazingly ancient and full of specimens and creatures not found anywhere else. Kamloops is the top end of the Sonoran desert ... complete with rattlesnakes, cactus and tumbleweed!

My track avoids the right side there but you'd have to be pretty tight to scrape it ... it goes pretty well straight up. If you ever want a copy of my effort just ask. I had a lot of fun adding Instant Scenery stuff and turning it into an airport with a Park, shopping mall and seaplane base. It's been a real ball. On to Kelowna next ... I'm going to recreate the Pacific Western Airlines daily route VCR, Kamloops, Kelowna, Penticton, Vancouver.

Best to you Lane, catcha sooner rather than later.

Ken