Hi Selector,
>i read today in flypast magazine that a 262 had a turning circle of aprox 11 miles ... is this true?
No.
Imagine it going 720 km/h (200 m/s) at an altitude where it can still pull 5 G (or actually a bit more to avoid losing altitude). That will result in a turning circle of 1630 m or pretty exactly 1 mile.
Of course, in the thinner air at increasing altitude, it will lose the ability to pull 5 G, though. Still, as long as it's able to sustain at least 1.4 G, the turning circle at even at the aircraft's top speed of 880 km/h will not increase beyond 12.2 km or 7.6 miles.
Regards,
Henning (HoHun)