LearJet Misses ILS Approaches

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Re: LearJet Misses ILS Approaches

Postby Nexus » Tue May 25, 2004 1:02 pm

Boeing recommends  vref+5 during automated ILS approaches, yes that is 5 kts faster than VREF but not a whole lot. Airbus has  a similar system with VAPP and VLS.

Braking action is not greater during autoland, you still select autobrakes and they apply a constant brake pressure, regardless if the approach was auto or manual...however the braking distance may be a little bit longer, but that
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Re: LearJet Misses ILS Approaches

Postby Flapsup » Tue May 25, 2004 1:55 pm

Try doing an approach entirely on auto pilot all the way down from cruise until short final. APP is also a setting of the auto pilot. usually when you turn onto your last ATC vector or shortly there after you can go to APP and if you are initially below the glidepath as FS9 will place you, the aircraft will aquire the glideslope and bring you down it. On short final go to manual throttle and at about 50' elev. turn off auto pilot and flare.  It works all the time for me with everything from the Lear to the 747.  MS9 is set up to aquire the glideslope from below.
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Re: LearJet Misses ILS Approaches

Postby GeneticA » Tue May 25, 2004 3:51 pm

OK. I have tried it. Here are the results.

First I made an approach in the usual way I do. That is I turn off the autopilot and autothrottle before TOD point. Then I flew the STAR. Turned to final and hit approach. Ofcourse to catch the glideslope, I was below the glideslope a bit. What happens is that, the autopilot makes a descent at about 400-500 fpm when it is below the glideslope. So it takes some time to catch the glideslope. If you made an relatively short final then you may end up landing before rwy.

Then I made a second flight. This time I made everything same as before but activated altitude hold during the last turn. This way the plane kept going level until catching the glide slope. After catching the glideslope the altitude hold turned off automatically and the plane started its descent on the glide slope. And I made a perfect landing.

I guess, the point is to activate the altitude hold before the last turn.
I'm trying to land
This aeroplane of ours gracefully
But it seems just destined to crash
(Bj
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Re: LearJet Misses ILS Approaches

Postby YodaNYC » Tue May 25, 2004 4:08 pm

For accuracy, you should check the approach plates once you are given the STAR and runway vectors.  This way you will know exactly at what altitude you should be at the outer and middle markers for a given airport.
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Re: LearJet Misses ILS Approaches

Postby atotti2000 » Tue May 25, 2004 4:09 pm

so can you actually use aoutopilot to land?? ::)
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Re: LearJet Misses ILS Approaches

Postby Nexus » Tue May 25, 2004 4:50 pm

Okay anthony here's the hard facts ;)

Yes - it's very possible to land with autopilot. Although the function is simplified in the Simulators stock aircrafts, you can still execute safe landings in bad weather.  :)

Search the forum you'll find tons of posts about this :)
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Re: LearJet Misses ILS Approaches

Postby atotti2000 » Tue May 25, 2004 4:59 pm

thanks nexus. ill keep searching : ;D
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