What does Sustainer Acceleration and Sustainer Duration Do?

[AcariaPlainum]

Hey i was working on modifying missiles and came across sustainer acceleration and sustainer duration. I wanted to know what it does

[Flanker562]

Duration is the sustainer booster for the missile I believe, in seconds, but Acceleration may be in Gs

Edited August 13, 2022 by EricJ

[streakeagle]

Most modern medium and long range missiles use a two-stage engine: during boost phase, a short strong burst of power is used to get up to speed, then during the sustain phase, the output of the engine is much weaker to allow the engine to burn longer to increase range. So, these ini settings allow you to try to replicate this process. The sustainer is just strong enough to try to maintain the speed of the missile while flying straight. Once the sustainer burns out, the missile is gliding unpowered.

Older missiles and short range missiles tend to use a short, strong single boost phase, then coast until they run out of speed.