Abstract: An acceleration resistant pyrotechnic delay unit delays the ignition of a warhead subjected to high acceleration on launch and high deceleration on impact. The delay unit includes a delay cup housing a pyrotechnic train. The delay cup has a primer cavity a delay cavity and a detonator cavity. A frusto-conical passage extends between the primer cavity and the delay cavity, with the small diameter end opening into the delay cavity. Primer, delay and detonator components of the pyrotechnic train fill the respective cavities in the delay cup. The various components of the train are well supported on all surfaces to prevent fracture due to high acceleration and deceleration.