Consumable wafer igniter

A consumable wafer igniter for a rocket motor comprising a cup-shaped container having an open end, an inner end wall and a cylindrical wall with a flange on said open end for attachment to the surface of the propellant of the rocket motor to define the igniter gas generating chamber, said cylindrical wall having a plurality of peripherally spaced exhaust ports therein, the inner surface of said cylindrical wall being lined with at least one layer of elastomer liner having holes therein in alignment with the exhaust ports in said cylindrical wall,

• a flat propellant disk positioned in said chamber adjacent said inner end wall of said container, said propellant disk having a plurality of holes therein for adjustment of the mass flow gas rate and having radial grooves on a surface thereof to direct the burning propellant gases through the aligned holes and exhaust ports in said liner and said cylindrical wall, and
• means to ignite said propellant disk,
• said flange having a circular key thereon extending in a direction parallel to said cylindrical wall and adapted to extend into a mating circular cavity provided on the surface of the rocket motor propellant for interlocking said container and said rocket motor propellant thereby to reduce a tendency for bowing outwardly of said cylindrical wall upon increase in pressure of generated gas in said chamber.