Simviation Forum - Backcourse hold & TO/GA

May 23^rd, 2003 at 5:48pm

mohtcat Offline
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Hi everybody,
I'll be thankful if somebody gives a brief description of TO/GA (take off/go around mode) and BC (backcourse hold) switchs and also the way to use them.

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Reply #1 - May 23^rd, 2003 at 6:16pm

FSTipster Offline
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I'll try and cover the back course for you.

If you're on an approach to a runway with an ILS system at the opposite end (perhaps because of wind direction) you can use Back Course (BC) to guide you in in the same way as the APPR button.

However, there is one fundamental difference between the operation of BC and APPR:

BC can not give you the glideslope so you have to control your own descent. It's function is limited to lining you up with the ILS.

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Reply #2 - May 23^rd, 2003 at 8:19pm

zcottovision Offline
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And I'll take TO/GA.

TO/GA stands for Take Off/Go Around mode, and it's a throttle mode used for take offs (and go arounds). It gives you optimal thrust for taking off, and for going around. All you do is sit at the end of the runway, put on your parking brakes, switch to autothrottles, and engage TO/GA mode. Then don't let off the parking brakes until your plane is creeping forward, and watch it go!

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Reply #3 - May 23^rd, 2003 at 9:12pm

Lethal.Ambition Offline
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Are you serious? That is how it is? I learned about Backcourse right now!

OK to make sure i have it right.......

Airport KXXX has ILS runway 36 but wind does not allow me to land because it is going 18, i tune in ILS for runway 36 but i head towars runway 18.....i hit the Backcourse switch and i get aligned perfectly for the runway, all i have to do is descent......

TO/GA........Only seen it in heavies but cool system

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Reply #4 - May 23^rd, 2003 at 9:14pm

Lethal.Ambition Offline
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Oh but to work the TO/GA i need to turn the AP Autothrottle first right? .....and when should it be shut off? When i reach crusing altitdue?......

and on VATSIM speed limits are a rule, how fast does that take me? right on 250 kts?

Oderint Dum Metuant - Let them hate as long as they fear.&&Proud member of the =XE= Xtreme Eagles&&Oderint Dum Metuant&&

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Reply #5 - May 23^rd, 2003 at 10:35pm

FSTipster Offline
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Quote:

Are you serious? That is how it is? I learned about Backcourse right now!

OK to make sure i have it right.......

Airport KXXX has ILS runway 36 but wind does not allow me to land because it is going 18, i tune in ILS for runway 36 but i head towars runway 18.....i hit the Backcourse switch and i get aligned perfectly for the runway, all i have to do is descent......

That's it exactly assuming that Rwy 18 doesn't have an ILS available.

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Reply #6 - May 23^rd, 2003 at 10:40pm

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Reply #7 - May 24^th, 2003 at 11:55am

Lethal.Ambition Offline
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Quote:

and we have people b####ing
that this isn't real enough for
them

huuuuummmmmm!! Roll Eyes

x

I know right? Probably because they aren't serious enough as to take everything out of FS

Oderint Dum Metuant - Let them hate as long as they fear.&&Proud member of the =XE= Xtreme Eagles&&Oderint Dum Metuant&&

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Reply #8 - May 24^th, 2003 at 2:41pm

Ivan Offline
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Quote:

Oh but to work the TO/GA i need to turn the AP Autothrottle first right? .....and when should it be shut off? When i reach crusing altitdue?......

and on VATSIM speed limits are a rule, how fast does that take me? right on 250 kts?

To/GA mode gives you about 95-98%N1 depending on your groundspeed and aircraft type. which can easily get you to 300 kts below 10.000ft
you need autothrottle to switch it on, when you go to speed-hold mode it switches off (but i never use it

)

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Reply #9 - May 26^th, 2003 at 3:54pm

jamese777 Offline
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Does anybody know of a place which describes all this stuff for us newbies? I have heard that the one book written on FS 2002 is lousy. Where can one learn all the tricks in one reading?

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Reply #10 - May 26^th, 2003 at 4:52pm

zcottovision Offline
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The best place I've found for FS (and real aviation) knowledge is these forums.....!

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Reply #11 - May 26^th, 2003 at 8:24pm

jamese777 Offline
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Quote:

The best place I've found for FS (and real aviation) knowledge is these forums.....!

Yeah, me too. I just wish I could read it all in one book or manual for quick referencing. So many posts, so little time!!!

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Reply #12 - May 27^th, 2003 at 6:54am

Speedbird_03 Guest

Quote:

Oh but to work the TO/GA i need to turn the AP Autothrottle first right? .....and when should it be shut off? When i reach crusing altitdue?......

and on VATSIM speed limits are a rule, how fast does that take me? right on 250 kts?

While I'm taxiing I dial up 250 on the AP speed controller. Once in the climb I hit the IAS button on the AP, which automatically disengages TOGA and engages speed control, and settle in to a 250 knot climb.

Above FL100 I use mach number to set climb and cruise speeds which lets me follow speed control regulations while getting a clean take-off.

If the SID is particularly tight I'll dial up a slower initial climb speed and keep the slats out for a little longer.

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