[MISSING TRACK FILE] Flap Asymmetry

[Specter]

Today I suffered a LEF asymmetry making the aircraft impossible to trim wings level.

 

After landing and bringing the flaps up I noted that the DDI FCS page stated the LEFT LEF was still at 12 down whilst everything else was up. On looking it was actually the RIGHT LEF that was down so the DDI indication is the wrong way round. See picture linked below.

 

Also of note that although an aircraft repair was carried out it did not fix this problem.

 

 

https://drive.google.com/open?id=1V1E-XhbHjfVjpdYWRwQOWAMmUP23_ele

Edited February 8, 2019 by <Specter>

[Rennes]

I've experienced the same thing, more than once.

[Specter]

I notice my thread title has been changed to include [missing track file] although I fail to see how a track file will help you to look at a picture!

[pellelil]

Bug or pilot error? - Asymetric leading edge flaps

 

I have a problem I have experience a few time with the hornet. It is not happing all the time, but a few times now after I have come in for and landing, shut down the aircraft at then start it up, I have a problem with asymetric leading edge flaps.

 

 

This time around I managed to save a track (link below). I did my first AAR (ever) a few weeks back and I am stil trying to train it some more so I have a small refuel mission where I start in the air relative close to the tanker. After having refueled I come back to Kobuleti, where I shut down the plane and "rearm/refuel" (actually I take fuel of the plane). During the taxi my rudder-pedals play a trick on me and I taxi off the RWY. On both occations I get a "Ck Flaps" and both times I extend/retract the flaps, and "the numbers" on the right DDI are just as they should be.

 

 

I then start up the plane again and when I run the FCS-test I end up with asymetric leading edge flaps, and I can't clear the problem. On this occation I did not, but the last time I had this problem I tried to shut down the plane, do a repair and start it up again, but the problem persisted.

 

 

Anyway the Track is available here:

http://www.liljendal.dk/portals/1/files/tmp2019/F18FcsProblemAfterStartup2ndTime.zip

[pellelil]

Here is a screenshot from the previous time where I had the same problem (but did not save the track). As you can see on the LDDI the left LEF is 12 but the right is 34, and the RDDI stays locked at "SF TEST" it never proceeds:

[FZG_Immel]

common issue on real Danish Hornets ;) :P It's modelled right :)

 

 

Sorry, more seriously I don't know

[pellelil]

common issue on real Danish Hornets ;) :P It's modelled right :)

 

 

Sorry, more seriously I don't know

 

 

:megalol: Sadly Denmark decided on replacing its ageing fleet of F16's with F35's in stead of Hornets :-)

 

 

On a more serious note, I've see this issue a few times now, but have not been able to figure out the pattern causing it.

[pellelil]

I have come to believe this is a bug? but perhaps provoked by what I did.

 

 

I have played my track quite a few times, re-taking control after landing/during the roll-out. After landing the flaps are retracted, and I lower them to full during the shut-down.

 

 

 

As far as I can see the problem occurs if I shut-down the left engine BEFORE lowering the flaps. Doing so, I power up the aircraft again (after a rearm), and when I during the start-up sequence raise my flaps, the left LEF says 12 and the right says 0. At this point a FCS-reset/bit-test will not help. I can't get rid of the asymetric LEF.

 

 

However if I during my shut-down procedure lower the flaps BEFORE shuting down any engine (hence lower the flaps before shutding down the left engine) I will have no problem during the power-up (no asymetric LEF).

 

 

I tried with a fresh mission on the ground where I simply power-up, power-down, and re-power-up the aircraft, but have not been able to provoke the problem even if I shutdown the left engine prior to lowering the flaps - which is what makes me think its a bug !?

[Moafuleum]

Im sorry, i didn't play your track but do your leading edge flaps actually deploy or is it just displayed on the FCS page? From your screenshot it is not visible since it is from behind.

[pellelil]

No its not just the FCS page. Looking at the aircraft from the front it is very obvious they are asymetric, and if you try to take off an fly you have to do a lot of trimming to compensate

[pellelil]

I have come to believe this is a bug? but perhaps provoked by what I did.

 

 

I have played my track quite a few times, re-taking control after landing/during the roll-out. After landing the flaps are retracted, and I lower them to full during the shut-down.

 

 

 

As far as I can see the problem occurs if I shut-down the left engine BEFORE lowering the flaps. Doing so, I power up the aircraft again (after a rearm), and when I during the start-up sequence raise my flaps, the left LEF says 12 and the right says 0. At this point a FCS-reset/bit-test will not help. I can't get rid of the asymetric LEF.

 

 

However if I during my shut-down procedure lower the flaps BEFORE shuting down any engine (hence lower the flaps before shutding down the left engine) I will have no problem during the power-up (no asymetric LEF).

 

 

I tried with a fresh mission on the ground where I simply power-up, power-down, and re-power-up the aircraft, but have not been able to provoke the problem even if I shutdown the left engine prior to lowering the flaps - which is what makes me think its a bug !?

 

 

I had it happen once again, and this time I did not power down Left Engine before lowering the flaps, so apparently I did not find what was causing it as I initially thought

[Eldur]

:megalol: Sadly Denmark decided on replacing its ageing fleet of F16's with F35's in stead of Hornets :-)

 

They're just taking small steps at a time

 

Didn't have that problem myself yet, but it is odd indeed.

[Svend_Dellepude]

Try to do a DCS repair.

[Doum76]

Today I suffered a LEF asymmetry making the aircraft impossible to trim wings level.

 

After landing and bringing the flaps up I noted that the DDI FCS page stated the LEFT LEF was still at 12 down whilst everything else was up. On looking it was actually the RIGHT LEF that was down so the DDI indication is the wrong way round. See picture linked below.

 

Also of note that although an aircraft repair was carried out it did not fix this problem.

 

 

https://drive.google.com/open?id=1V1E-XhbHjfVjpdYWRwQOWAMmUP23_ele

 

 

Well my friend, that's what you get for buying a second-hands Hornet with lots of hour flight time on the airframe for a cheap price on Ebay :P

[pellelil]

Did try a Repair, it does not correct the problem.

[norman99]

Re-raising this bug.

If you shut down the left engine, then lower the flaps to full, which is the correct procedure from NATOPS, the left LEF becomes stuck at 12 upon startup. Nothing will fix it.

Could this please be moved to the bug section so it doesn’t get lost.

Edit: After double checking, flaps should be selected to full BEFORE engine shut.

Edited January 17, 2022 by norman99