larger and more powerful Avon engines for use in the J35 Draken fighter. The Swedish version of this engine was RM6. The co-operation with Rolls Royce was expanded with subcontract manufacture of components for commercial aircraft engines.
The development of the various versions of the RM8 engine for the Viggen combat aircraft, derived from the commercial Pratt & Whitney JT8D engine, became a major success, greatly strengthening Sweden's position on the international aircraft engine market. During this period Volvo took over all stock in the company and re-named it Volvo Flygmotor AB.