"most of them are just explosive charge launchers, not the rocket engine propelled variety that can deliver real range and accuracy"
The very same technology that ICBM use. An explosive charge (black powder) lights a rocket engine that launches the rocket in an approximate direction.
Once in flight, the GPS guidance system kicks in and the fuel runs out long before it reaches its target. It just needs to gain enough height and speed to be steerable by fins.
You don't need much thrust to launch a device a few hundred yards from your target.
GPS accuracy can be increased using your own low power datum transmitter that is at a know grid reference (like your back yard).
The testing for such a device is negligible as the detailed instructions exist.
Here are excerpts from the FAQ of the Amateur Rocketry Society of America:
"Isn't Amateur Rocketry today the same as the Old Basement Bombers of the 1950's and 60's?
NO! The major difference is the propellant used by amateurs today. In the old days, all amateurs had to work with was zinc/sulfur packed powder, packed black powder or potassium nitrate/sugar. The packed powders were extremely dangerous and accounted for most of the accidents reported in the media. While potassium nitrate/sugar was much safer, it made an unreliable and poor performing propellant.
Today, amateurs use the same type of propellant used in the solid rocket industry, composite propellant.
....
...None of the chemicals used in making the propellant are on the ATF explosives list...
...Under Federal law, you can make your own rocket motors and rockets. The ATF does not require any license or permit for making your own motors as long as they are for your own use and you use the motor in the same state you make it in...
...To fly most of your rockets, you will need a waiver from the FAA. It is an easy form to fill out and costs nothing to get a waiver...
...To produce the propellant you will need a simple triple beam laboratory balance capable of measuring to a tenth of a gram. This is necessary to measure the exact amount of curing agent and propellant ingredients. They can be purchased new for around $125 or you may be able to find one at a pawn shop for around $50. For multiple pound batches of propellant, you should have a Kitchen Aid mixer. These cost around $175 to $200. However, you can get by with an electric "egg beater" type mixer which is cheaper. These sell for around $50. The chambers, nozzles and bulkheads can be made using an electric saw and electric hand drill. However, the work is a lot easier if you have a bandsaw, table saw and drill press. The balance of the tools are simple pliers, files and screwdrivers....
...You do not need to be a member of Tripoli or the National Association of Rocketry (NAR) nor do you have to be certified by them to make your own rocket motors or fly amateur rockets...."
Here are some pics of the devices an amateur can make:
space-rockets.com |
