DARK test motor nozzle - new prototype

Today I finished machining of the first prototype nozzle for a new version of the DARK solid propellant characterisation motor. The new design is a collaborative effort among DARK members and is based on a common stainless steel nozzle “blank” with a bonded graphite throat insert. The internal nozzle geometry is machined after bonding the graphite insert.

DARK test motor nozzle

The complete nozzle is sealed externally with an o-ring seal and retained in the motor bulkhead with a retaining ring.

DARK test motor nozzle