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dozzy177

Turn off AP on ILS approach 7 nm from touchdown and ...

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... then all hell brakes loose... the plane throws itself in all directions, totally uncontrollable by hand, etc. Had to pause and then stop flight to avoid crashing, very frustrating.

 

Also, I noticed that the G/S was not present on either EHSI or the primary...

 

(This is after SP1, by the way.)

 

Any ideas, please ?


Aetheris Avidus

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Apple iMac 21", i5 quad CPU 680@3.60GHz with 8Gb RAM, running on Windows 7 x64 +SP1 with ATI Radeon HD5670

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Guest bstolle

ILS without G/S ???? LOC & G/S displays ok on the PFD (post SP1)

Concerning the other issue. AP disconnects ok with the C90 staying nicely in trim. Try flying less hamfisted....

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ILS without G/S ???? LOC & G/S displays ok on the PFD (post SP1)

Concerning the other issue. AP disconnects ok with the C90 staying nicely in trim. Try flying less hamfisted....

 

Same, I've made about 5 ILS approaches before the SP and 3 ILS approaches post SP and never had a issue disconnecting the AP or flight issues at all just in general.. This plane flies like an absolute dream.


Bill

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When I disconnect the autopilot on a ILS final, the aircraft stays in trim, but the flight director bars disappear. Hitting Ctrl-F brings them back for a split second and then they are gone again. I don't remeber this happening prior to SP1.

 

Dale


Dale

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When I disconnect the autopilot on a ILS final, the aircraft stays in trim, but the flight director bars disappear. Hitting Ctrl-F brings them back for a split second and then they are gone again. I don't remeber this happening prior to SP1.

 

Dale

 

That is correct, the FD bars are currently only active in HDG,NAV,ALT modes when the AP is turned off.

The revised documentation also includes APPR, and BC... This could be added in SP2.

 

Send me a PM if you would like to test this capability.


Bert

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That is correct, the FD bars are currently only active in HDG,NAV,ALT modes when the AP is turned off.

The revised documentation also includes APPR, and BC... This could be added in SP2.

 

Send me a PM if you would like to test this capability.

Somehow, that doesn't seem logical - I don't need the flight director when the autopilot is flying the approach, but it can be of great assistance when flying to minimums by hand. The KC-135 I flew in real life had an FD-109 system and the flight director was active on a ILS approach with the autopilot off. Ok, it's not a major problem, just me re-living my old flying days.

 

Dale


Dale

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Hi Dale,

 

I would love to see a RW Pilot's Guide for this Collins Autopilot - the function as currently implemented

is an approximation for sure..

 

Having said that, leaving the approach mode on, after disconnecting the autopilot, is a simple change.

So, the offer stands, send me a PM for a test..


Bert

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I'll check our library at the Air Force Museum Restoration Center to see if we have a Collins FD109 Guide.

 

Forgive my ignorance, but what is a PM?

 

Dale


Dale

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I'll check our library at the Air Force Museum Restoration Center to see if we have a Collins FD109 Guide.

Dale

 

That would be great! The Collins autopilot model is APS-65.


Bert

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the plane throws itself in all directions, totally uncontrollable by hand, etc

Didier,

 

I had a similar problem...engines surging and wild swings in yaw. Turned out to be a prop lever calibration issue. I was also getting control spikes in my throttle quadrant. Once I took care of those two things, the controllability issues disappeared. I flew an approach into KHQM last night that was rock solid and I was able to keep it right on the blue line until I crossed over the fence and pulled the power.


Best Regards,

Kurt "Yoda" Kalbfleisch

San Diego, CA

Beta tester for PMDG J41 & NGX, Flight1 Super King Air B200, Flight1 Cessna Citation Mustang, Flight1 Cessna 182, Flight1 Cessna 177B, Aeroworx B200

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Didier,

 

I had a similar problem...engines surging and wild swings in yaw. Turned out to be a prop lever calibration issue. I was also getting control spikes in my throttle quadrant. Once I took care of those two things, the controllability issues disappeared. I flew an approach into KHQM last night that was rock solid and I was able to keep it right on the blue line until I crossed over the fence and pulled the power.

 

Yes I believe this could be an issue with my CH quadrant and CH yoke, although it has never happened with any of my large fleet. Tonight, I had the same experience, but before that ALL my lights came out at the same time on the annunciator, a real Christmas tree, all of them and stayed there, there was nothing I could do to stop that and of course all my knobs & levers were on the right place...

Then again, about 1 minute after deselecting AP, nearing short finals (3 miles) the plane became uncontrollable, pitching up and sideways as I could not stop it, against trim, etc... (believe me this was NOT pilot induced oscillation, I am a flying instructor, btw) and I had to cancel the whole thing, something always frustrating after a good flight. The good news is that the G/S was showing this time.

Ach well !


Aetheris Avidus

(facebook)

 

Apple iMac 21", i5 quad CPU 680@3.60GHz with 8Gb RAM, running on Windows 7 x64 +SP1 with ATI Radeon HD5670

FSX Acceleration, TrackIR, GEX, REX Ess+o/drive, UTX, ORBX usa.

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Interesting! Today on an ILS final I had my trim-up go awol from my Saitek Pro Flight Cessna Yoke. Now I've only had this yoke for about a week but its the first time it happened. I panned down to look at the controls console and found the C90's trim down was working (from the Saitek yoke) but not the trim up. I went into the settings/controls menu and found for some reason the button setting for trim-up had cleared to null. I reset it and went back to the sim and was able to continue the approach, albeit below G/S. I had shortly before (about 3 minutes) the turn to final come off of autopilot. I logged five approaches today in various aircraft and this was the first incident of the kind. This may be an issue to watch - loss of various controls coming off of autopilot or autopilot functions. For me I came 100% off of autopilot.


Frank Patton

Gigabyte GA-Z97X-Gaming 7 MOB; i7 4790 4.4Ghz; 16gb DDR3 2300; MSI GTX970 4gb Gaming 100ME, ASUS GTX 1070 TI Turbo 8GB, Coolermaster Pro 5 case, Corsair H100i

Former USAF meteorologist and ground weather school instructor; AOPA Member #07379126

There is no limit to what a man can do or where he can go if he doesn’t mind who gets the credit! - Benjamin Jowett

 

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