History:
FF 11-12-41 CRD Contract R-RH Cv IX proto M61 15-12-41 FF as Mk IX 27-3-42 Worthy Down 27-4-42 R-R 20-6-42 RAE 3-7-43 eng/airframe resonance trls with mock-up eng. Also M61 driving flywheel comparison tests with BR138. Both aircraft had vibrograph sessions HAL 303Sq 21-7-43 AST 28-7-43 308Sq 16-11-43 80Sq Damaged during practice bombing AC 29-5-44 AST CE 10-7-44
* for acronyms please see source:
Spitfire Production