Trim with no center spring stick.

[rge75]

I'm not sure if this is the right forum because the question doesn't just belong to the Huey (also Mi-8 or any other aircraft). In the special register of the settings, you can chose the option "joystick with no centering spring/no FF", so the setup I actually have.

 

 

But what's the purpose of trimming with such a controller - or what does trimming in fact even do? Is it just the option to "disable" trimming?

 

 

I mean, when I turn my stick right, it will stay right. And when I press trim, it of course won't do anything at all. So I'm simply not using trim at all with that config.

[Simicro]

Hello rge75,

 

You could have posted in the "general" DCS World 1.5 & 2.0 Open Alpha forum or Input and Output forum. But me too, I would have posted in Huey or Mi-8 forum.

 

Me too, I ask to myself the same question as you, but did not take time (or was too lazy ?;)) to post so far.

 

To complement your question, for me "joystick with no centering spring/no FF" are:

1) Joysticks that are natively without springs like yours, specially designed for helicopter flying

2) Force feedback joysticks which have been set up with no force/friction

3) "Normal" joysticks whose springs have been removed from by user

Edited September 16, 2017 by Simicro

[Holton181]

My interpretation, afrer reading a post where some Belsimtek guys modified a standard joystick by removing the centering spring and added friction to the stick for it to stay in any position (can't find the thread anymore), that it is ment to allow non-FF pilots to fly and trim closer to reality, leaving the stick in trimmed position and still send corresponding information to the AP computer.

[rge75]

Hmm, I still dont' get it. What shall it do when I press the trim button on my non-FF controller (using the Pro Flight Trainer Puma which means no centering spring but friction)? The function seems pointless for non-centering spring/non FF controller?

 

 

It made sense with a normal joystick and curvature to fly from center position again.

[FragBum]

Hmm, I still dont' get it. What shall it do when I press the trim button on my non-FF controller (using the Pro Flight Trainer Puma which means no centering spring but friction)? The function seems pointless for non-centering spring/non FF controller?

 

 

It made sense with a normal joystick and curvature to fly from center position again.

 

As best I understand it balance roll and pitch, this maybe somewhat off centre due to load or wind conditions or forward flight press the trim button and move the cyclic to "centre" release the trim button. You've recentred the cyclic position and retained the offset in the cyclic control. This will keep your sweet spot for where your forearm sits on your lap whilst holding the cyclic.

 

But I don't bother using with Gazelle or Huey.

Edited September 16, 2017 by FragBum
<typo>

[Gizzy]

With the Huey, Force centering devices are incorporated in the cyclic controls and directional pedal controls. These devices are installed between the cyclic stick and the hydraulic servo cylinders, and between the anti-torque pedals and the hydraulic servo cylinder. The devices furnish a force gradient or "feel" to the cyclic control stick and anti-torque pedals.

 

A FORCE TRIM ON/OFF switch on the center pedestal turns the system on or off.

 

When ON these forces can be reduced to zero by pressing and holding the force trim push-button switch.

 

Some pilots used Force Trim others did not...

 

DCS mimics this 'trim' function by allowing you to center the stick (no spring forces) whilst maintaining a 'trimmed position'.

 

If your Pro Flight Trainer Puma has no spring acting upon it and is comfortable, switch force trim off, you do not need it!

Edited September 17, 2017 by Gizzy

[rge75]

Ah, now I understand the system. Thank you both for the explanation. I'm not yet sure if I'll use the trim function in that case. In some cases it might be useful if you can "re-center" the cyclic to have a better "feeling"/cyclic position again.

[Holton181]

cl...and still send corresponding information to the AP computer.

I realized this part of my description don't fit here. It was late and I believed I was writing in the Ka-50 thread. Just disregard it.

[Holton181]

...

DCS mimics this 'trim' function by allowing you to center the stick (no spring forces) whilst maintaining a 'trimmed position'.

...

Isn't this when having "center trimmer mode" selected in the preferences?

I believe the question was about the trimmer mode in the title?

I might be wrong though.

 

But I agree, I don't believe it's needed with a PFT stick (I have the Lynx myself)

[rge75]

Well, I thought it would be possible to press the trim button, move the stick to center and release the trim button (that's how I understood the messages above). But pressing the trim button simply doesn't seem to do anything in my case. Anyway, I won't bother with it anymore.

[Holton181]

For Huey I believe it's only to increase the immersion, alow pressing the button and hear the sound of it in the sim but without the unrealistic move to center.

Previously you got that automatically with FF and "default" mode, now you can have it without FF too.

For the Shark it affects the AP too I believe.