Plane keeps swinging to the left

[Kerbkerbkerbkerb]

So over the past few days I've tried assembling a bunch of planes, including a small flying wing and an SSTO superlifter.

Every single one of them has an issue that they will always swing to the left once they get in the air. They also swerve a lot on the runway, and seem to plateau at 2900 metres altitude, but I think those are separate issues.

Many different plane designs all do this, some of them sharing next to nothing between them. I've tried shifting COM both forward and back and that doesn't fix it.

Mods are tweakscale, procedural wings, and OPT spaceplane continued.

Imgur link won't attach, so im not sure how to provide images

[king of nowhere]

15 hours ago, Kerbkerbkerbkerb said:

So over the past few days I've tried assembling a bunch of planes, including a small flying wing and an SSTO superlifter.

Every single one of them has an issue that they will always swing to the left once they get in the air. They also swerve a lot on the runway, and seem to plateau at 2900 metres altitude, but I think those are separate issues.

Many different plane designs all do this, some of them sharing next to nothing between them. I've tried shifting COM both forward and back and that doesn't fix it.

Mods are tweakscale, procedural wings, and OPT spaceplane continued.

Imgur link won't attach, so im not sure how to provide images

click on insert image from url, but you have to add .pgn to the copied link manually.

 

are your planes symmetrical?

[Vanamonde]

There are several reasons planes wight deviate on the runway but if it's still doing it in flight, make sure your joystick is centered and clear any potential trim settings with alt-X. 

[Kryxal]

In real life, your CFI would be telling you "More right rudder!" this very instant...

[mhanson76]

Does OPT Spaceplane work on 1.12.5?