All fuel lines pointed inwards at an angle. In the middle there was the oxidizer line. To start the engine the fuel valves were opened gradually until a foot long yellow flame shot out of the rocket. Than it entered the combustion chamber with an explosion and the rocket was started. I shall build this when I gain access to a machine shop.
Rocket engines operate at very high pressures and can cause great damage if they are to explode.
Experiment with care. Also make sure to check back later for information on building your own solid fuelled rockets. All rights reserved. So ASK ME before you remove anything from here.