Design

  The next class is Large Model Rockets and is a term used in the FAA FAR 101 regulations used to describe NFPA model rockets that weight between 454 grams and 1500 grams ( 1 to 3.3 pounds) total liftoff weight.  These rockets contain more than 113 grams of propelant but less than 125 grams of total fuel.

  High Power Rockets exceed to total weight, total propelant, or single motor impulse restrictions of model rocketry but, do otherwise conform to the same regulations as model rockets.  High powered rockets follow the same guidelines for construction as model rockets in regards to materials and pre-manufactured commercial rocket motors.  High powered rockets do allow the use of metal bodies and structural components where necessary to insure the sturctural integraty of the rocket.  High powered rockets do not have weight restrictions however do have a restriction of no more than 40,960 N/s single motor total impulse, and a total power limitation of 81,920 N/s of total impulse.

  Amateur Rocketry covers all other areas of non-professional rocketry.  This includes metal bodied rockets, liquid propellant, hybrid propellant, and any rocket flying with a home made moter.

Experimental Rockets is a term used by Tripoli Rocketry Association to describe rockets the use either solid or hybrid rocket motors but do not qualify as high powered rockets.  This includes metal bodied rockets and those with more than 80,000 N/s of total impulse.

  HPR-Lite is the same term as Large Model Rockets and shows up in use in the rec.model.rockets newgroup but Large Model Rockets is the correct term and should be used to advoid any confusion.