Well, I'm just a wee truckie but, on the Jet provost, with Pilots' Notes figures of +6/-3 we frequently took it to +6 and, less frequently, to -3 *.
The JP and, later, the Bücker Jungmann, provided me with the most fun I've ever had in an aeroplane.
*Tried an outside square loop one day. The little Viper wasn't up to the huge drag of pushing -3 and I didn't make it. One did however, push -3.5 and, upon reporting same to old Chiefy in line hut, was told: "That's what it really is but they know you young gentlemen will push things a bit so they tell you it's - 3.0."
