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SPANNERS, TOOLS, AND SPARES.
A complete set of spanners suitable for carrying out any adjustments to the engine together with a quantity of spare parts, are supplied in Tool Box with each engine. A set of special Spanners and Tools such as are required for dismantling and erection are supplied at an extra cost.

MATERIALS.
All materials used in the construction of these engines are produced in exact conformity with Rolls-Royce Specifications which are based on many years' experience with alloy steels and non-ferrous alloys. These specifications embody all the requirements of the standard specifications issued by the British Air Ministry, but are much narrower in their scope and demand greater freedom from impurities, also closely limit variations of heat-treatment.

TESTING OF MATERIALS.
All mild and alloy steels are carefully tested in the raw state, every bar and billet being proved by heat-treatment, fracture and Brinell test, to insure that the raw material is correct to specification.

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