A little instance last night at work where a 757 decided to try and prove it can still fly while flying slower than the cars on the highway below.....with an Airbus on the visual behind got me thinking about the difference in wake turbulence separation requirements in different countries.
Here in Canada, A320 behind 757 requires 5 miles. Over in the UK, 4 miles. Here, PA31 behind 747, 6 miles. Uk requirement, 8 miles. Same PA31 behind A320 in Canada, 4 miles. UK requirements, 6 miles. And this is all before we even get into the "SMALL" category
I find the differences a little amusing, tis all.