ORIGINAL: rw Guinn
I also said Firing Rockets from your RC could trigger an exclusion. Didn't say anything about dropping.
Let me try again.
I believe you can FIRE a rocket off of an RC plane, if the rocket is under independant RC control. Cause under this definition it is an RC plane that is rocket powered and that is OK in the rules.
As to the original question..
There are many rules restrictions of model rockets especially in the west, so you will need to find a place that is suitable to fly. So a specific location might need a permit, but in general you do not need one. THe AMA offers pretty good insurance that is cheap, 58 bucks per year for 2.5 million. BTW there are limits to the size of the motor allowed under AMA rules.