Auto-Trim Pitch vs Manual Trim

[ruddy122]

It could be just me but when I manually trim in Pitch the trim runs away

I read the Viper could do Auto Trim

Does anyone else has the same problem

[104th_Crunch]

I am pretty sure pitch trim is rarely used in RL in the F-16. The FLCS constantly auto trims for 1 G. Best to just never use pitch trim.

 

[Deano87]

1 hour ago, ruddy122 said:

It could be just me but when I manually trim in Pitch the trim runs away

I read the Viper could do Auto Trim

Does anyone else has the same problem

Runs away in which direction? Are you trimming using a trim hat on your stick?

Also for what purpose are you trimming? I can’t remember the last time I trimmed the F-16 in pitch for any reason. 

Edited October 12, 2022 by Deano87

[ruddy122]

YouTube says the Autotrim a little slow on approach you may need to Trim Up to help it

Enroute hit Trim Up by accident and Pitch Trim went crazy

[Deano87]

3 hours ago, ruddy122 said:

Enroute hit Trim Up by accident and Pitch Trim went crazy

Ok and it does it repeatably? 

[ruddy122]

I think its a one off I hope

Not touching trim to be sure

[Scofflaw]

In DCS, the initial pitch trim range is a bit sensitive but slows down.  What this means is that pitching up/down from neutral trim will be pretty aggressive at first.  The roll trim seems steady in its entire range.  I'm not sure what you mean by "autotrim a little slow on approach", as far as I understand it, the aircraft tries to maintain 1G, but you can maintain 1G at all kinds of different AOAs.

If you hit RCTRL+ENTER, you will see your trim settings, and the above statements will make more sense.

[Ignition]

7 hours ago, ruddy122 said:

YouTube says the Autotrim a little slow on approach you may need to Trim Up to help it

Enroute hit Trim Up by accident and Pitch Trim went crazy

Which youtube video?

I never used the trim up/down really, no need for it if the aircraft is not broken or something.

[Frederf]

F-16 never changes trim without pilot input except during wheel spin up (takeoff roll) which runs pitch wheel to center. There is no auto trim.

A runaway trim wheel is not normal. The trim wheel can by moved on the console or by the remote trim hat on the stick (if DISConnect switch not disconnect). I would check which item in the cockit you're interacting with.

[ruddy122]

Curious does the FLCS know what 1G flight is? And maintains it

Viper is amazing once you read more about it

[Deano87]

2 hours ago, ruddy122 said:

Curious does the FLCS know what 1G flight is?

Yes. One of the main bits of data the FLCS uses is G loading.

[Dragon1-1]

In the Viper, pitch trim is basically not used, because it trims G. Unless you want to trim it to fly hands-off in a turn, there's no reason ever to trim for anything but 1G, which is the default. On top of that, the trim switch isn't super-precise, as on other aircraft, but here it's a problem because if the pitch trim is wonky, then it'll be wonky no matter what you do, because it's trying to maintain a different G. That's where the wheels come in handy, and also if you need to precisely trim out roll (which FLCS doesn't do much for other than to apply a limiter).

[RuskyV]

The trimmer switch on the stick could do with being a little slower or less sensitive allowing for finer amounts of adjustments. When pressing the trim the actuation is a little faster than some of the other jets makes trimming a little less precise. I don’t think this is anything to do with the flight model Itself but more to do with how the trim is working with this module.

A little slower and more precise.