Eliminating particle system trail

Hello I am developing a rocket jet using particle system.

The problem is that particle system I have developed is leaving a trial like this. (I have even tried reducing the life time of particles…) Also I have number of setting that I can’t change…

Trail

I want to fix this problem to make it look more realistic like this
SpaceX

I’m using free version of Unity.

Use “size over lifetime,” and use “color over lifetime,” and don’t use the “default particle texture,” because it is lame.

I see 3 particle systems in the lower image; 4 if you are counting the big dust cloud. No need to try to do it all with one.

I can’t tell you the exact settings you need, because particle systems are an art more than a science, and the only way to get the effect you want is to just play around with it until it looks right.

What do you mean by “settings you can’t change”?

Also- have you tried using a LineRenderer or a TrailRenderer in addition to the particle system?