Oh dear, sorry guys I meant vortices.
The ones I think I saw were at night (just after dusk) off the flaps on finals. I had 30 degrees. I'm really keen to see if I can make them appear on a 172 again. What sort of conditions (numbers) should I look out for to get the highest chance of producing these things? Obviously I want to do it safely, someone said something about manuevering but lets face it the 172 is a straight and level bird.
