Liquid-fuel engines should lose angular momentum

[pleroy]

In Frobenius, only solid-state boosters lose angular momentum. For liquid-fuel engines it's a reasonable phenomenology to assume that the fuel goes through an infinitely thin conduit on the axis of the engine, and therefore that no angular momentum gets lost. However, if such an engine is not located on the axis of the rocket, there must be an angular momentum loss due to the distance from the axis (lever arm). That must be modelled.