There are an infinite number of shapes and forms the flameholder may take. The baffle type flameholders are among the more dependable type flameholders. However, the radial finger or grid type appear to be the most popular in present-day ram jet designs. A baffle type flameholdor operates best with maximum fuel density at the engine's central axis. Taking into consideration the body structure, a conical baffle type, flameholdor appears to be best suited for the example engine.
Any interruption usually means hot spots or burnouts in the shell.
The amount of airstream blockage created by the flameholder directly affects the engine performance. With too little blockage the flame can not be maintained. Too much blockage decreases the thrust available from the engine. The goal of the designer is to maintain combustion over a wide range of fuel flow with as little blockage as possible. Referring to the example engine the area of the base of the flameholder cone should not exceed 30 percent of 35 square inches.