An evaporative cooling pack formed from first and second corrugated media sheets is provided. The evaporative cooling pack cools a flow of air using a cooling fluid. The first and second corrugated media sheets have flutes that extend at different angles relative to a reference line and at such relative angles and have flute pitches that inhibit nesting of the adjacent sheets.

A gas turbine engine includes a compressor, a turbine, and an engine shaft coupled to the compressor and the turbine; a gear assembly including a driveshaft and an accessory gearbox, the driveshaft rotatable by the engine shaft and the accessory gearbox rotatable by the driveshaft, the accessory gearbox including an AGB output, and the gear assembly defining a first overall gear ratio between the engine shaft and the AGB output; and a phasing gearbox coupled to the accessory gearbox and including a PGB output, and the phasing gearbox defining a second overall gear ratio between the AGB output of the accessory gearbox and the PGB output, wherein the second overall gear ratio is an inverse of the first overall gear ratio.

A gas turbine engine includes a compressor, a turbine, and an engine shaft coupled to the compressor and the turbine; a gear assembly including a driveshaft and an accessory gearbox, the driveshaft rotatable by the engine shaft and the accessory gearbox rotatable by the driveshaft, the accessory gearbox including an AGB output, and the gear assembly defining a first overall gear ratio between the engine shaft and the AGB output; and a phasing gearbox coupled to the accessory gearbox and including a PGB output, and the phasing gearbox defining a second overall gear ratio between the AGB output of the accessory gearbox and the PGB output, wherein the second overall gear ratio is an inverse of the first overall gear ratio.

An evaporative cooling pack formed from first and second corrugated media sheets is provided. The evaporative cooling pack cools a flow of air using a cooling fluid. The first and second corrugated media sheets have flutes that extend at different angles relative to a reference line and at such relative angles and have flute pitches that inhibit nesting of the adjacent sheets.