- Jun 26, 2012
- Calgary, Alberta, Canada
With a good duct and Vy at 60 knots, 40 square inches should be fine for the water and oil, assuming a well designed duct. If Vy is slower than that, you'll need more inlet area. With all the obstructions aft of the rad, you may well need more inlet area.Combine area of water and oil coolers about 105 in.² My Russian friend apparently have some experience with this engines and he thinks I need about 60% of this area for inlet. I don't know if he's right.