ComradeGoat

Gladly. It's here: http://www.sarahlizzy.com/Labrys.craft It behaves well enough at low altitude and low speed. Take it to orbit and play with it there. 1 to init. 2 toggles rockets. 3 toggles jet and intakes. ETA: 4 toggles solar panels

It's drifting for me when I start from dead stable. Ship is slightly out of balance, and it doesn't attempt to correct for that, or rather it does, but on a different heading. :-(

No it isn't. It settles on the original heading when I turn the engines off. With thrust on, it settles on a heading 10-13º away. That is not what is happening here. Look at the video closely. Watch what happens when I apply thrust, when it's sustained, and when it's removed. Pay close attending to the throttle, the nav ball, and the pitch indicator.

The vessel I'm having most trouble with weighs less than 10 tonnes on the runway.

See the post directly above yours. That is a bug, plain and simple.

Maybe if you'd read those 30 pages, you'd have seen proof that it most certainly does not work "just fine", including this video I posted where it will hold a heading until thrust is applied, then pitch up, and hold a new heading around 13° off the old one, until thrust disappears when it resumes the old heading. I know why it pitches up: the plane has a slight vertical imbalance (which increases as it burns fuel, unavoidable really), which it has more than enough turning force to counter (and indeed it does), but it won't hold a heading.

That's not all of it. See the video I posted some pages back where it will hold two different headings: one under power, one not. It *is* eventually applying enough torque to hold a heading, but it's the wrong heading!

Only a lot of those of us having problems are having problems with planes, not rockets.

Yes. When some of us are trying to explore a bug that's affecting us, a bunch of people shouting, "it works OK for me" are not being entirely helpful. If it works for you I'm glad, but it's not working for me, and I've posted video proof.

It doesn't even do that. Watch the video I posted a couple of pages back.

Watch the video I posted. It starts out in a stationary, held position, wanders from it when I apply thrust, and then holds a different one 10-13º away. When I stop thrust it returns to the original position. Reapply thrust and it wanders again. I'm not asking to press T while spinning wildly and come to the point where I pressed it, but it would be nice if I can point in a direction, apply thrust, and actually have the vehicle go in that direction.

Her plane, actually, but thankyou for getting this. It's so frustrating to keep getting told I need to add more rotation force when it won't use the force it has. :-(

Watch the video again. The pitch when controlled by SAS never reaches full deflection. It never even comes close. I can correct it myself simply by pressing W. Lack of rotational power is not the issue here. What's the point in adding more when it won't use what's already there?

If you're asking about my video, no. There is no joystick. This is just a MacBook Air with a fresh install of KSP and a stock spaceplane I built which can hold a heading manually, but SAS will hold a heading that's 10-13º off the one it's supposed to hold, because it is very slightly out of balance (which planes will be - it's not really avoidable, but this is why we have gimbals).

Of course it is, it's a plane! They don't have vertical symmetry. It's painfully apparent that this slight misalignment is what causes the initial drift. The problem is that ASAS isn't correcting it, when the craft is perfectly capable of correcting that slight imbalance. Indeed, it does eventually do so itself, but only when it's about 13º off the set course.

OK, I made a video. Here is a demonstration of the problem I'm seeing in space. Stock craft, fresh download of KSP, nothing else done in that game other than launch that plane. I also experienced a bit of phantom roll and yaw during the ascent, but did not attempt to correct them. It seems ASAS/SAS will allow a certain amount of drift before noticing something is up and stopping it, but it never returns to where it's supposed to be. Watch the navball and the pitch indicator in this video. The only keys I pressed throughout are shift and X. ETA: At one point there seems to be around 13º deflection from the "set course" when under thrust, which it will hold while under thrust, and then return to the set course afterwards. Note is only applying about 30-40% pitch maximum to try and correct, and will apparently deliberately hold the wrong course on a tiny amount of torque, when all it needs to do is apply a bit more to return to where it's supposed to be!

KSP Store, having problems.

Mine too. I can fly it manually. SAS can't.

For the umpteenth time, there is plenty of torque available (gimbals, reaction wheels, even RCS is I turn it on). It takes the tiniest manual adjustment to hold a heading. SAS simply isn't using it.

Where "getting that right" appears to mean, "with full rotational symmetry". Good luck designing a plane with that property.

Actually, a lot of what you say makes sense. The plane I'm having most trouble with is powered in orbit by 2 LV 24-77s. The plane is tiny, but so is the TWR (because the jets do the heavy work). Perhaps it's tuned down so much that it won't gimbal the engines to the extent needed to stabilise the comparatively larger mass of the spaceplane. Doesn't explain why the thing flies in atmosphere with phantom forces all over the place, but seems plausible for the problems I'm having in space.

Tried it. Doesn't work.

"Hey! You turned me on! Look at how I make this pretty light come on. No, that's pretty much all you're getting. Gimbals? They sound complicated, I'd better leave them alone. Hey, that planet looks nice! Let's try crashing into it."

Nope. From a stable heading in orbit, turn on SAS, throttle up, watch it start to pitch up all by itself. Keep correcting manually by tapping W every few seconds. It's no way to fly.

How are we supposed to do long interplanetary transfer burns if there is no-longer any heading lock functionality?