Aerospace Propulsion Products B.V. (APP) is a Dutch company providing igniters for launcher engines.
APP develops and produces igniters for the engines of the space launchers Ariane 5 and VEGA. APP has facilities and dedicated equipment for production and testing of solid propellant grains, HNF (hydrazinium nitroformate) and for the assembly of gas generators. APP has temperature and humidity controlled rooms for propellant mixing, casting and curing. Such facilities are also available for assembly of gas generators. A pilot plant for the production of HNF is available, producing HNF both for research purposes but also on a commercial basis. In January 2008, APP has opened a second production facility dedicated to the production of cool gas generators.
It is a joint venture of Stork and TNO.