user2705: How can I make the particular trail longer? 
Why when I animate the particular do I only have a trail when I parent it to an Object or Emitter?

user4426: Agree with the previous answer. You could also add Wind or Turbulence in order to make the "tail" blow further away from the emitter.

user2453: You need to change lifespan of the particle and move the emitter around.  The longer the lifespan of the particle the longer the trail will be because the trail is composed of ageing particles. 

2705: <p>How can I make the particular trail longer? </p>

<p>Why when I animate the particular do I only have a trail when I parent it to an Object or Emitter?</p>
 4426: <p>Agree with the previous answer. You could also add Wind or Turbulence in order to make the "tail" blow further away from the emitter.</p>
 2453: <p>You need to change lifespan of the particle and move the emitter around.  The longer the lifespan of the particle the longer the trail will be because the trail is composed of ageing particles. </p>
