7 on an M1500 Rocket Motor. Certification in South Africa Rocketry SA offer a certification programme in South Africa with similar processes and procedures to those of the US and UK. Level 1 : H, I Level 2 : J, K, L Level 3 : M, N, O In order to gain certification an individual needs to demonstrate his ability to successfully build, launch and recover a rocket within the given power range of the level he/she is seeking. Construction High-power rocket designs can vary widely as do anticipated altitudes and performance, but altitudes of and velocities in the supersonic ranges are not uncommon. A combination of (often) larger mass and higher apogees may require sophisticated recovery systems. High-power rockets are frequently flown with sophisticated electronic devices used for recording flight data (altitude, velocity, acceleration/deceleration, G-forces) and for deploying recovery methods or devices. High-power rockets are constructed from materials such as phenolic resin, fiberglass, carbon fiber, and other composite materials and plastics. Motor casings are normally machined aluminium with ablative phenolic or paper liners and are reloadable, i.e. can be used multiple times. Propulsion High-power rockets are predominantly powered by commercially available APCP-based motors or nitrous oxide-based hybrid motors. Motors for High-Power Rocketry are typically "H" and above (with a few notable exceptions in the "G" range). The lettered naming system is a standard in the hobby in which successive letters double the delivered impulse of the previous letter. Each letter also has a range of impulses under which a given motor can be classified. Obtaining rocket motors in the United Kingdom Black powder motors, typically manufactured by companies such as Estes and Quest are classed as fireworks, and subject to few purchase restrictions in the UK, the main restriction being the purchaser must be over 18 years old. The motors are available up to class D in the UK and only suitable for low power model rockets. Ammonium Perchlorate is classed as an explosive by the UK Health and Safety Executive, so Ammonium Perchlorate Composite Propellant (AP) motors formerly required the purchaser to have an Explosives Licence and Recipient Competent Authority Transfer Document (RCA). A Registered Store Certificate was also required if the purchaser wanted to store the motors rather than purchase them at the flying event and use them immediately. The UKRA has negotiated an exemption so that model rocket fliers can obtain some AP motors in limited