im need fan force to be attached to dynamic object.
how can i do that?
ive managed snap fanforce position but i dont know hot to edit direction parameter.
http://clip2net.com/s/2cSuy [clip2net.com]
what should i do to convert my rocket's rotation to direction?

The simplest way is to find two points which define your rocket's direction. eg. point at base centre and another at the tip. Subtract tip by base to get a direction.