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Climbing on ILS

Posted:
Wed May 04, 2005 3:25 pm
by expat
When flying the "737 Experience" aircraft on an ILS approach the aircraft always climbs.
I start at about 20 miles out, engage ILS and the aircraft goes about 30 to 40 degrees nose up and climbs to about 15000 feet. I have tried various starting altitudes and I get the same responce. The aircraft still follows the correct track, it just over flies the airport..
Heading and coarse are both set to the runway heading. Alt hold is off. I have also tried to engage auto land, but it has no effect.
anyone got any ideas??
Matt
Re: Climbing on ILS

Posted:
Wed May 04, 2005 3:33 pm
by beefhole
20-30 miles out is a REEALLLY long way out, meaning that the glideslope is FAR FAR above you. This would explain why it climbs. You need to start your final approach much, much later. (sorry I don't have a mileage, ATC has been vectoring me in for so long...)
Re: Climbing on ILS

Posted:
Wed May 04, 2005 3:37 pm
by jrpilot
There is no set distance for the final, but generally I believe it is 7 miles, and you may still be under the GS at this time so for a little bit of time you may stay level and then gone down with the GS
Re: Climbing on ILS

Posted:
Wed May 04, 2005 3:38 pm
by expat
That could be it, I was on try out flight VFR after installation. I will try IFR out and see what happens.
Thanks
Matt
Re: Climbing on ILS

Posted:
Wed May 04, 2005 7:59 pm
by dave3cu
Do not disengage the Alt. hold, the ILS will disengage it as it intercepts the glide slope .
No expert here, but this works for me.
Re: Climbing on ILS

Posted:
Wed May 04, 2005 8:58 pm
by chomp_rock
Remember, start slightly below the GS, not above it.
Re: Climbing on ILS

Posted:
Fri May 06, 2005 12:59 am
by expat
Sorry for the late get back. Thanks for all the input. I will try to find time between wife, children, dog, fish, cutting the grass, cleaning the cars, fixing all the stuff that was damaged/broken during the week by said wife, children, dog. (I don''t find that the fish break much) and shopping to give your thoughts a go.
Thanks again
Matt
Re: Climbing on ILS

Posted:
Fri May 06, 2005 10:17 am
by Nav
Matt, you should leave both Alt. Hold and Hdg. Hold on until the autopilot turns them off. You may also be neglecting to switch the mode from 'GPS' to 'NAV'. Distance out isn't critical.
This will take you through the whole procedure:-
http://www.simviation.com/cgi-bin/yabb/ ... 1111322151
Re: Climbing on ILS

Posted:
Fri May 06, 2005 3:10 pm
by expat
Thanks Guys.
My problem was that I started tooooooooo far out.
Matt
Re: Climbing on ILS

Posted:
Fri May 06, 2005 9:59 pm
by beefhole
Thanks Guys.
My problem was that I started tooooooooo far out.
Matt
As suspected

Happy ILS'
