ERJ 145 autopilot

[tyler24]

Had this happen to me while executing VOR8 into PNS. This approach is the first VOR i have executed with the final approach fix being the VOR in the ERJ so im not sure what happened. While passing over FAF the autopilot starting chasing the needle as the sensitivity increased, non the less i had to go missed and hand fly it into the airport. Any ideas why this happened? The LNAV was selected as approach mode.

 

[Uncle Bunkle]

hmm..let's see...Cone of Confusion ring a bell?
Next time, hit Heading mode before reaching the VOR, then hand fly it in.

 

[Mesabi Miner]

On the Saab, the AP goes into "DR" mode, or dead reckoning. It won't chase the needle through the cone and will only begin navigating again on the other side.

 

[shroomwell]

If autopilot does something wrong or something you don't like, disconnect it and hand fly it. You should not of had to go around.

 

[goahead]

In the Crj at ASA we fly a Vor app. with the PF in white needles (FMS) and the PM in Green Needles (Actual VOR Freq.) to lessen the chance of things like this happening. Can you not do this in the EJ?

 

[xkuzme1]

...

In that situation it is better to have selected NAV for the approach instead of APR. When you select APR and VAPP is on your PFD the sensitivity will be about 4 times higher. It wont chase the needle in NAV mode. If you like to you can just select APR after you cross the FIX.

Just the same just TCS and hand fly it through ( you should be monitoring it and CAN/SHUOLD catch it) or just throw it in HDG mode.

Hope that helps.

 

[U-I pilot]

In the Crj at ASA we fly a Vor app. with the PF in white needles (FMS) and the PM in Green Needles (Actual VOR Freq.) to lessen the chance of things like this happening. Can you not do this in the EJ?

We CAN physically do that on the ERJ....however it depends on company procedures. At XJT we dont do approaches on FMS (magenta) needles because we arent GPS certified yet.

 

[dowhite2]

Had the exact same thing happen to me in the 145 on VOR8 into PNS.

 

[tyler24]

i disconnected but elected to go around after the initial shock of "ok what exactly is it doing, as the course came in and then went full scale." I guess the biggest point is that no where during training or my 121 flying had i been in this situation or ready for it. I just wanted to make sure it wasnt a malfunction in the system

 

[Lav Service]

The autopilot is a piece of crap. It will chase the needle anytime it get's a little wild. Try flying an ILS in ORD in heavy rain behind a 757. The long and short of it is, is that the autopilot can't handle much beyond smooth and level during approaches. With the exception of LNAV mode it's going to be a little crazy......its best just to fly by hand.

 

[rjacobs]

The autopilot in the 145 sucks at everything. Fly the thing in heading mode and dont worry about the vor tracking or approach mode, if you are trusting/dependent on the automation that much to where you have to have the AP shoot a vor approach, im sorry. The airplane hand flies extremely well, exercise that option.

 

[Stifler's Mom]

You should see the CRJ-700 intecept a localizer in ATL. It rolls out lined up for the inboard runways, and I'm sure on more than one occaision scared the crap out of somebody on the south side with 28/27L or 10/9R in use.

 

[greg52083]

Seen this before from the jumpseat. It went full scale 3 times in both directions. LNAV intercept in FMS HDG does a MUCH BETTER JOB!!!

 

[snap145]

If autopilot does something wrong or something you don't like, disconnect it and hand fly it. You should not of had to go around.

good advice Chet.....how about if your ever in doubt...always go around.....i think alot of us have a tendency to become automation dependant and never just "fly" the airplane, but with that being said if you were in doubt good call on the missed.....

 

[hawaiimei]

I'll have to pop out the FOM to answer the question (for myself), but I thought that the VOR approach was flown in NAV mode, not APP so as to not capture a glideslope.... i.e what would you do on a LOC when the GS is out of service (but you begine to recieve one?)

NAV man.... NAV. When it goes to ******************** and you get scared, go with the handfly option and scare the ******************** out of the other guy too.

 

[cwebster2]

the magic black box knows the difference between an ILS and a VOR.

If you hit APR and get "LOC" and "GS" then its an ILS and it will track a gs if there is one (and this is the reason you dont use APP on LDA's or backcourses that do not feature a GS).


If you hit APR and get "VAPP" then its a VOR and it does not arm a vertical mode.

in short,

ILS and VOR and some LDA approaches ... APR.
LOC, BC and some LDA approaches ... NAV.

 

[ERJFO]

I'll have to pop out the FOM to answer the question (for myself), but I thought that the VOR approach was flown in NAV mode, not APP so as to not capture a glideslope.... i.e what would you do on a LOC when the GS is out of service (but you begine to recieve one?)

NAV man.... NAV. When it goes to ******************** and you get scared, go with the handfly option and scare the ******************** out of the other guy too.

You ever notice localizers and VORs have diffrent frequency ranges and if you press APR with a VOR freq in the RMU it goes to VAPP, not LOC and GS??? Thats the same reason when you press Nav and you have a localizer frequency in the RMU it goes to LOC and not NAV.

 

[Shifty]

Ok purdue kids, hit the quick disconnect button and fly the airplane. we all know that the autopilot sucks. Do you know how to fly the emb without the autopilot?

 

[Shifty]

answer NO!