Problem NASSP SPS thrust frantic roll

[spinkle]

Please can some one help me as when hitting the sps thrust on nassp i am finding that i end up going into a frantic roll? what am i not doing whats causing this?

 

[indy91]

So you started the SPS engine with the "Thrust on" button? Did you start the Thrust Vector Control? There are a few different control modes for SPS thrusting, from completely automatic controlled by the Apollo Guidance Computer to manual control. The "Thrust On" button is part of the backup system, but still totally valid and possible in NASSP to perform maneuvers this way. Learn more about the Thrust Vector Control and the SPS in general here: http://nassp.sourceforge.net/wiki/Service_Propulsion_System#Thrust_vector_control