Control Surfaces (set to roll) not making full use of their movement range

[Noname117]

So I was just building a new fighter jet with forward swept wings, mainly as a test for the viability of using the new radiator panels in custom cockpits, and I encountered a bit of a problem with it in flight: It wouldn't roll well. Upon further examination, I noticed that my ailerons were barely even moving. Later, on the ground, I switched the other control surfaces along the wing to roll as well and took a couple of pictures. The problem should be immediately apparent.

Control surfaces in normal position:

Control surfaces in roll position:

The control surfaces have barely moved at all! What's worse is that the leftmost 2 control surfaces have actually rotated in the opposite direction that they are supposed to (This was later confirmed in flight). It is very possible that this is due to the forward sweep of the wings, which is shown in the picture below:

Before I bring this post to a close, there are definitely a few concerns some of you might have which I have to address:

-I did have a few mods installed when I took those screenshots and first observed the problem, but removing the mods did not solve the issue

-The sideways facing pod shown in the SPH picture was not attached in any of the tests, with the kerbal in the command seat. The ailerons actually moved more when the craft was being controlled from the pod.

-In case this was some glitch with controlling from the command seat, I added a forward-facing probe core in the fairing acting as the nosecone of the aircraft. This did not solve my problem.

-I did replace the aileron with several other control surface types, all of which experienced the same problem

I honestly have no clue why my control surfaces set to roll just aren't acting correctly. I suspect it to be something with the aerodynamic changes SQUAD made in the most recent update. It would be most helpful if anyone could shed some light on what is going on here.

Thanks!

Edited June 27, 2015 by Noname117

[SAI Peregrinus]

Just tested, it works perfectly for me.

And don't complain about people taking under a day or so to reply. To test something we have to set up a fresh KSP install with the given configuration, do the test, then report. Unmodded is easier since I can keep an empty install and make a new save, but it's still going to take about 10 minutes of work to do the test. And I'm not going to drop everything just to do a test for a random forum user.

[Noname117]

Well, something is clearly wrong for me. Maybe I should give you the .craft file and see if that is bugged?

https://www.dropbox.com/s/q5ywa0u657jydvu/XNAFA-33.craft?dl=0

[Noname117]

Further testing has shown this happens on wings of all types, and that wing sweep does affect it. In my opinion, this means that SQUAD has broken both forward swept wings and consistent roll control. I don't think I'll be playing KSP for a good while now

[Jon144]

Ridiculous! That is all that I can say. This bug really undermines a craft's maneuverability.

[Noname117]

Here are some more various pictures of a test rig I have set up showing the control surfaces behaving weird and likely not how they should:

The control surfaces are all at various angles. Some have moved more than others, some have moved less. Some are trying to roll the aircraft in the opposite direction. As a plane designer, these tests show that at least my KSP is broken, and possibly everyone else's games too.

[SAI Peregrinus]

Ok, I see the issue more clearly now.

A part opposed to its direction of control won't actuate. Actuation amount is scaled by angle (specifically, it's multiplied by the cosine of the angle between that of an optimal control surface for the input and the actual angle of the surface.)

This means that you no longer have to disable yaw on horizontal control surfaces, or pitch/roll on vertical ones. It's an odd change, and not in the patch notes as far as I can see. It would make building basic planes easier, which could be the reasoning.

Edited June 28, 2015 by SAI Peregrinus

[Noname117]

Thanks for clearing up this issue a bit, though I am still uncertain as to why that would cause control surfaces to rotate in the opposite direction of what they should.

Anyways, can someone wake me up when SQUAD fixes enough of their game for me to find it playable again? I'll be off to ARK and War Thunder now, maybe try to throw in some Wargame or something. Bye KSP, I hope to see you sometime again in the future!