Problem with particles - spaceship thruster

Hi,

I have a problem with particles used as engine thrust - I can create them, but I have no idea how I can destroy it - only method known to me is give it "one shot" property, but then it looks rather bad :/

Here is my file: http://www.box.net/shared/ojx5ee76t4

You better off setting it to activated/ unactivated, rather than destroying it.

When you destroy it all parts of the object get destroyed at the same time, so it may look a little funny.

Mybe I am retarded, but I can't find this option

Under event actions there are some tabs. Click the one that just says "Particles", under that there is a command that says "Set spray enabled".

+ System: Start of layout

-> Particles: Set spray Off

It works! Thanks a lot!