Combustion chamber for rotary engine

A combustion chamber for a rotary engine, comprising:

• an inner chamber including a left-half chamber and a right-half chamber, which are combined and tightly connected together to provide the complete inner chamber;
• the inner chamber having a spherical interior wall surface;
• the left-half chamber having an intake pipe arranged on a left end thereof and a spark-plug mounting pipe perpendicularly extended from a right end thereof;
• and the right-half chamber having an exhaust pipe arranged on a right end thereof;
• and
• an outer casing including an upper cover fitted onto an upper side of the inner chamber, a lower cover fitted onto a lower side of the inner chamber, and a locating plate provided at a central area with an opening for the spark-plug mounting pipe to fitly extend therethrough;
• the upper and the lower cover being locked to each other at one end by threading screws therethrough, and the locating plate being connected to another end of the upper and the lower cover by threading screws through the locating plate into the other end of the upper and the lower cover, so as to provide the complete outer casing with the inner chamber being confined in between the upper and the lower cover and the locating plate.