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Dave Shaw
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Post subject: Posted: Wed Jun 29, 2005 8:24 am |
Joined: Sat Jul 13, 2002 4:56 am Posts: 67 Location: Moose Jaw, SK
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The DME arc is primarily used to confuse the living #### outta pilots.
The 3 degree glideslope is for normal pilots, such as you or me. The 31 degree glideslope is for pilots like Keith, hence the need for replacement LDS gear and paving equipment wherever he may wander.
For me, the easiest way to get the hang of the glideslope was to use the VASI lighting, almost exclusively. I found that if I tried to nail a specific angle of descent using the instrument, I tended to "overthink" the approach, and wind up chasing the blasted glideslope into the ground or halfway down the runway. Just try using the VASI, pitch and power...see how you make out...
Cheers!
_________________ If you are attacked by clowns, defend yourself!! Go for the juggler!
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Keith CVA51
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Post subject: Posted: Wed Jun 29, 2005 9:27 am |
Joined: Fri Dec 29, 2000 7:01 am Posts: 710 Location: Wembley, Alberta
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Ah, gee, helpful as ever, 'ole Dave is.... And a controller too... tsk, tsk.
Although he is right about using the lights to help guide you down. (The Red and white ones, to the left of the runway).
Pull out that Chart and let's see if I can help you there.
Let's say you're flying into Timmins. It's a very dark and stormy night. You know what runway your shooting for (03), and you know the ILS frequency (109.70).
What you don't know, and can't see (Dark and stormy, remember?), is your exact position around the field. So how can you set up the approach? You want to intercept the inbound track and get on the glideslope, but where is it?
What you need, is an initial fix. This is the point where "final approach" starts. Once at the IF, you should be configured for landing and intercepting the ILS for a straight in run at the airport. At most airports, these fixes are NDB's or Intersections, which can be programmed into a GPS, FMS or manually calculated (you can USUALLY find an intersection by shooting VOR radials...) You also don't want to be flying around in the dark looking for this magic fix, possibly bumping into other aircraft who are doing the very same thing.
Look at the chart. You'll see towards the bottom of the "top down" map the notation "IF 10 DME" This is your Initial Fix. Also note the two small lines going straight off the bottom of this chart. The Western one is marked LR-220 and the Eastern one is marked LR-200.
Here's the way I fly approaches like this.
Tune NAV1 to the ILS frequency and inbound track. Tune NAV2 to Timmins VOR (113.0) Hopefully your aircraft will have an RMI pointer for NAV2 that also gives you DME readings. Tune the ADF to TANGO (263) Assume I'm approaching the airport from the East.
I fly to YTS with the NAV2 RMI needle pointed straight up (We'll get into wind corrections later) and watch the DME reading. As it counts down to around 15 or 18 miles, begin a left turn to intercept the 12 DME arc. What I want to see, is the RMI needle pointing directly to the right (the station is off my right wingtip) and the DME reading at 12. Fly the arc by watching the DME. If it starts to count upwards (I'm drifting left, moving away from Timmins) I correct to the right and Vise-Versa. As long as you keep the needle pointed directly to the right (which keeps the station off your right wing) and the DME reading at 12, you can fly a 12 mile-wide circle around Timmins until you run out of fuel!
I also keep an eye on the BOTTOM of the RMI needle. The compass rose around the outside of the RMI will be turning as you fly the "Arc". Sooner or later, 200 degrees will be at the bottom of the needle. Remember the LR-200 we saw earlier? This is called the "Leading Radial" and is the Timmins 200 degree radial in this case. When the bottom of the RMI needle is pointing at 200, start the turn to intercept the LOC. (Right turn to 001 degrees).
If I've done it all right, I should hit the Localizer and be very close to the Glide slope bang on 10 miles out from Timmins. When my ADF needle swings 180 degrees, I know I'm over Tango beacon and 4 miles from touchdown.
Easy as pie.
Now, for your second question about the 31 degree glide slope. What you're looking at is the INBOUND course for runway 03. Just above it is 211, which is the reciprical (outbound) course for 03 approach. If you look just above that, you'll see a small "GP 3.0" which means "Glide Path 3 degrees"...
Hope that helps. If I've missed anything I'm sure someone will let me know...
Now on to a full procedure approach..... Ah, another day. It's late and I'm going to bed!
Edited By Keith CVA51 on 1120037361
_________________ CVA51-Keith Henry Chief Threshold Excavator
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katron
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Post subject: Posted: Wed Jun 29, 2005 10:49 am |
Joined: Fri Dec 31, 2004 9:18 am Posts: 284 Location: Prince George, B.C.
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Ok, Mr. Henry I will correct one thing... :p
[quote]and the DME reading at 12, you can fly a 12 mile-wide circle around Timmins until you run out of fuel!
This is the radiaus of the circle, not the width, it is 24 miles....LMAO
Somethings I am anal about just like DS.
_________________ James/CVA69.........cause that the way I like it.
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Bill Haystead
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Post subject: Posted: Wed Jun 29, 2005 11:42 am |
Joined: Thu Dec 28, 2000 3:36 am Posts: 633 Location: Capreol, ON
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I might have thought that "thank you Mr Henry" might have been a more appropriate reply.
Anal possibly. Just like DS - not a chance!
Cheers Bill
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katron
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Post subject: Posted: Wed Jun 29, 2005 12:04 pm |
Joined: Fri Dec 31, 2004 9:18 am Posts: 284 Location: Prince George, B.C.
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Hey Bill, I'm just pulling his chain and the help wasn't for me as I am beond that. apparently Mr. DS is about spelling, and I am about math :p
_________________ James/CVA69.........cause that the way I like it.
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Bill Haystead
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Post subject: Posted: Wed Jun 29, 2005 12:30 pm |
Joined: Thu Dec 28, 2000 3:36 am Posts: 633 Location: Capreol, ON
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My mistake James, the help was not for you and therefore my post was out of line.
Cheers Bill "eating humble pie"
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katron
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Post subject: Posted: Wed Jun 29, 2005 12:37 pm |
Joined: Fri Dec 31, 2004 9:18 am Posts: 284 Location: Prince George, B.C.
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LMAO.....Man I sure get some great laughs out of this place......Don't think Devon does though...
_________________ James/CVA69.........cause that the way I like it.
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71-1091752782
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Post subject: Posted: Wed Jun 29, 2005 12:57 pm |
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katron wrote: This is the radiaus of the circle, not the width, it is 24 miles....LMAO
Somethings I am anal about just like DS.
... but apparently not English.
Cheers!
Gary
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katron
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Post subject: Posted: Wed Jun 29, 2005 1:42 pm |
Joined: Fri Dec 31, 2004 9:18 am Posts: 284 Location: Prince George, B.C.
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LOL........Well Mr. G I can not spell worth the crap, and I accept that, but math and physics is a different story....
_________________ James/CVA69.........cause that the way I like it.
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Keith CVA51
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Post subject: Posted: Wed Jun 29, 2005 3:55 pm |
Joined: Fri Dec 29, 2000 7:01 am Posts: 710 Location: Wembley, Alberta
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