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(4) (Normal ------------------------------------------- 400 h.p. Power (Maximum ------------------------------------ 425 h.p. Propeller, normal speed --------------------------- 1500 r.p.m. Number of cylinders ------------------------------- 12 Cylinder bore ------------------------------------- 120 mm. Stroke -------------------------------------------- 150 mm. Ratio of compression (V + v) / v ----------------- 5.5 Average pressure -------------------------------- -- 7. (Eff. at m. kg/cm^2.) Total weight when empty --------------------------- 365 kgs. Total weight including water ---------------------- 385 kgs. Approximate total weight with water and radiator -- 410 kgs. Weight per horsepower with engine empty ----------- .9.0 kgs. Weight per horsepower with water and radiator ----- 1.005 kgs. Petrol consumption per h.p. hour: Guaranteed ---------------------------------------- .240 kgs. Average ------------------------------------------- .210 kgs. Lubrication system -------------------------------- Forced feed. Ignition system ----------------------------------- 2 magnetos with 12 spark plugs. Number of spark plugs per cylinder ---------------- 2. Number of valves per cylinder --------------------- 4. Number of carburetors ----------------------------- 4. Remarks - The weights are to be considered with 5% plus tolerance. The propeller is applied on the speed reducer shaft and its reduction ratio with the crankshaft is of 1:1,51. The propeller rotation is left-handed and the propeller may be a tractor or a pusher. the propeller shaft is drilled with a hole of 58 mm. diameter through which can be fired a machine gun or cannon. 559