CS-E 430 Water Spray Tests

(a)Installation Conditions. With the Engine suitably cowled or shielded to be fully representative of an installed Engine, a water spray must be applied throughout three periods of running.

(b)Running Conditions. Each period of running must comprise – Start Warm up Ignition checks 5 minutes at Take-off Power 15 minutes at Maximum Continuous Power 15 minutes at Maximum Best Economy Cruising Power 25 minutes at 60% of Maximum Continuous Power at 75% of Maximum Best Economy Cruising crankshaft rotational speed Ignition check and accelerations. Two-speed supercharged Engines must run the whole test in low gear.

(c)Interval Conditions. An interval of 24 hours must be allowed after each period of running. No adjustment or artificial drying-off must be undertaken from the commencement of the test and, when not running, the Engine must be completely covered in a manner which will fully promote moisture penetration. At the conclusion of the third cycle of running and standing, the Engine must be subjected to 5 minutes running at Take-off Power without the water spray.

(d)Water Spray Conditions. The spray must be arranged to deliver water in a manner representative of very heavy rain over the whole frontal area of the Engine including cowling, air intakes, etc., but not necessarily the Propeller tips, throughout the full running time. The rate of delivery, R, must be assessed from the formula – R = 12∙2F litres/min where F, in m2, is frontal area of nacelle.