BC Button

[Chris]

Archived from groups: alt.games.microsoft.flight-sim (More info?)

OK, this is the third time I've posted these 2 questions, without them
showing up on the group. I haven't seen them in 4 days now, so here we go
again.

1. What is the BC Button used for. I know it means back course, but what
exactly does it do?

2. Is there an add-on that adds airstrips that are not in the default list?
For example, There are 2 airstrips within 30 km of my house, and there are
always at least 6 cessna sized aircraft there. They're just dirt strips, but
are regular strips none the less. Would be nice to have a go at these.

There was another question, but I forgot what it was now. Must have been
real important!

Cheers,
Chris

 

[Guest]

Archived from groups: alt.games.microsoft.flight-sim (More info?)

Chris wrote:
> OK, this is the third time I've posted these 2 questions, without them
> showing up on the group. I haven't seen them in 4 days now, so here we go
> again.
>
> 1. What is the BC Button used for. I know it means back course, but what
> exactly does it do?
>
Like Scott says, it's an autopilot feature that tracks the localiser
signal for the ILS of the opposite end of the runway you're landing on.
I must say that I hardly ever use this feature because there's no
working glidescope, so if you fly your descent rate manually, you might
as well align to the LLZ manually as well.
The other possibility using the autopilot is to set ALT to just above
ground level, and V/S descent rate as appropriate, somewhere around 700
fps for a jet depending on speed. Plan to start the descent at an
appropriate distance from the runway. If you use the DME of the
localizer, remember to add in the runway length! You'll need to visually
gauge the correct descent rate from the PAPI lights when they are in sight.
In either case, set the OBS to the course of the ILS , not the heading
of the runway you are landing on, otherwise the needle deflects the
"wrong" way. To use Scott's example, for RWY8 set the OBS to 260.


> 2. Is there an add-on that adds airstrips that are not in the default list?
> For example, There are 2 airstrips within 30 km of my house, and there are
> always at least 6 cessna sized aircraft there. They're just dirt strips, but
> are regular strips none the less. Would be nice to have a go at these.
>
You can do this with addon scenery design tools. Welcome to the world of
Scenery Design!
Tom

> There was another question, but I forgot what it was now. Must have been
> real important!
>
> Cheers,
> Chris
>
>

 

[Guest]

Archived from groups: alt.games.microsoft.flight-sim (More info?)

On Sat, 10 Sep 2005 20:23:05 +1000, "Chris" <here@there.com.au> wrote:

>OK, this is the third time I've posted these 2 questions, without them
>showing up on the group. I haven't seen them in 4 days now, so here we go
>again.
>
>1. What is the BC Button used for. I know it means back course, but what
>exactly does it do?

Imagine that you're flying an ILS approach to a runway (say RWY 26),
and you've got the NAV radio tuned to the correct frequency. If
you're lined up with the localizer, the needle will be centered. If
you drift to the right, the needle will deflect to the left, showing
you which direction to fly to get recentered.

Now imagine that you're approaching the same runway, but from the
opposite end (you're going to land on RWY 8, which doesn't have an
ILS). You can tune the ILS frequency for RWY 26, and align to the
runway, but now the needle will work "backwards"--if you drift to the
right, the needle moves to the right.

The autopilot doesn't know that you're on a backcourse, so if you've
drifted to the right, it tries to recenter by turning right, instead
of left. The BC button tells the autopilot to reverse the normal
corrections it makes.

On a backcourse, you can't use the glideslope information to tell
you if you're high or low, so you (and the AP, if you've got it turned
on) need to ignore it.

Can't help you out with #2--sorry.

Hope this helps,
Scott

 

[Chris]

Archived from groups: alt.games.microsoft.flight-sim (More info?)

Thanks Scott! My guess was way off! I thought it would automatically take
you back around if you declared a missed approach or something like that.
What you have described makes sense to me now.
Cheers,
Chris
"Scott Stevenson" <almostfm.AMSPAY@UCKSAY.comcast.net> wrote in message
news:4329b6de.610437734@news.giganews.com...
> On Sat, 10 Sep 2005 20:23:05 +1000, "Chris" <here@there.com.au> wrote:
>
>>OK, this is the third time I've posted these 2 questions, without them
>>showing up on the group. I haven't seen them in 4 days now, so here we go
>>again.
>>
>>1. What is the BC Button used for. I know it means back course, but what
>>exactly does it do?
>
> Imagine that you're flying an ILS approach to a runway (say RWY 26),
> and you've got the NAV radio tuned to the correct frequency. If
> you're lined up with the localizer, the needle will be centered. If
> you drift to the right, the needle will deflect to the left, showing
> you which direction to fly to get recentered.
>
> Now imagine that you're approaching the same runway, but from the
> opposite end (you're going to land on RWY 8, which doesn't have an
> ILS). You can tune the ILS frequency for RWY 26, and align to the
> runway, but now the needle will work "backwards"--if you drift to the
> right, the needle moves to the right.
>
> The autopilot doesn't know that you're on a backcourse, so if you've
> drifted to the right, it tries to recenter by turning right, instead
> of left. The BC button tells the autopilot to reverse the normal
> corrections it makes.
>
> On a backcourse, you can't use the glideslope information to tell
> you if you're high or low, so you (and the AP, if you've got it turned
> on) need to ignore it.
>
> Can't help you out with #2--sorry.
>
> Hope this helps,
> Scott

 

[Guest]

Archived from groups: alt.games.microsoft.flight-sim (More info?)

Hi Chris,

http://walhalla.mine.nu/fs2004/australia.php

Look for the entry "Victorian Airfields, 115 airports...". and then
follow the 2 links to Avsim.

LOTS of other good Scenery on that site, for the entire world...

Regards,
John Ward
"Chris" <here@there.com.au> wrote in message
news:dfuc68$m8g$1@news-01.bur.connect.com.au...
> OK, this is the third time I've posted these 2 questions, without them
> showing up on the group. I haven't seen them in 4 days now, so here we go
> again.
>
> 1. What is the BC Button used for. I know it means back course, but what
> exactly does it do?
>
> 2. Is there an add-on that adds airstrips that are not in the default
> list? For example, There are 2 airstrips within 30 km of my house, and
> there are always at least 6 cessna sized aircraft there. They're just dirt
> strips, but are regular strips none the less. Would be nice to have a go
> at these.
>
> There was another question, but I forgot what it was now. Must have been
> real important!
>
> Cheers,
> Chris
>