Guardian G.I.

End results: false alarm - there's no spinning, the engines work as intended. I had spinning when I tried to circularize a slightly imbalanced TKS craft in the low Munar orbit, where the TWR of the engines was really high - that was the cause of the problem, not the parts themselves. The thrust display in the VAB is definitely weird, though, and should be fixed.

There's some kind of floating point error going on with the transform rotation, but nothing that could cause that large amount of thrust deviation. Furthermore, having a look at the config file, it doesn't have even have a gimbal. Points to some kind of unequal mass-distribution you have going on with that TKS craft there (Could you check the fuel levels in the radial tanks for me?), very confusing to say the least. I'll try and recreate this problem myself. Also, thank you for demonstrating the spoiler function, that will be useful :-) Quad-symmetry RCS tanks (100% full), quad-symmetry engines, dual-symmetry solar panels. The stock monopropellant engines have similarly slanted thrust.

I'm trying to build the TKS as close to original plans as possible. However, the craft seems to go into an uncontrollable spin during orbital burns. A closer inspection in the VAB shows that the monopropellant engines are to blame: If it's a bug, than that's a shame. TKS is probably the coolest looking spacecraft in the whole mod. The TKS cargo bay with the sliding doors is extremely useful for bringing small probes and modules into orbit.