Here are some times it took fighters to turn 360 degrees. This information is off the Sturmovik BBS and some of it was posted by Oleg Maddox (designer of Sturmovik).
by Oleg Maddox:
The best circle times of German fighters had 109F-2,F-4 and G-2(3 guns) - others worse and some much worse.
At 1000 m altitude:
F-2 - left turn - 20,5 sec, right turn - 19,6 sec.
G-2(3 guns) - left turn - 20,0 sec, right turn - 21,5 sec.
La-5F - left turn - 19,0 sec, right turn - 19,5 sec.
La-5FN - left turn - 18,5 sec, right turn - 19,0 sec.
La-7 - left turn - 18,3 sec, right turn - 18,9 sec.
LaGG-3(M-105P, 1941) left turn - 22,5 sec, right turn - 23,0 sec.
LaGG-3(M-105PF2, 1944) left turn - 19,0 sec, right turn - 20,1 sec.
Here are sustained turns of Bf-109s from NII-VVS:
Bf-109B1 - 16,0 sec left; 15,9 sec right
Bf-109E3 - 26,5 sec left; 29,5 sec right
Bf-109F2 - 20,5 sec left; 19,6 sec right
Bf-109G2 - 20,0 sec left; 21,5 sec right
Bf-109G2/R6 - 22,6 sec left; 22,8 sec right
Data from NII-VVS (Russian aircrafts-research centre) tests.
There are also several interesting results on the turn radius of different fighters tested in NII-VVS.
(in metres)
SpitfireIX - 235m
P-40E - 242m
P-39 - 253m
Yak-1 - 275m
Yak-9D - 290m
Bf-109G2 - 290m
P-51A - 290m
La-5FN - 295m
La-5 - 310m
Bf-109G2/R6 - 315m
FW-190A4 - 340m
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Wells recently posted the following:
For sustained turns at sea level with full internal fuel, I measured the following:
N1K2: ~24s @ 130 mph
SpitV: ~24s @ 105 mph
Spit IX: ~25s @ 125 mph
C202: ~25s @ 150 mph
C205: ~26s @ 175 mph
109f4 & La5: ~ 28s @ 150 mph
109G2 & G6: ~ 29s @ 160 mph
P-38L: ~29s @ 175 mph
109G10: ~30s @ 170 mph
P-51D: ~31s @ 150 mph
190A8: ~ 31s @ 175 mph
F4u-1C: ~32s @ 150 mph
F4u-1D: ~33s @ 140 mph
Typhoon: ~34s @ 130 mph
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Lets compare the data for the 109g2 and La5.
AH 109g2 360 degree turn and radius 29s, 160mph, 330m
Real life measurements 20.75s, 195 mph, 290m
AH La5 28s, 150mph, 300m
Real Life 18.75s, 220 mph, 295m
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Something seems a bit odd.
Hooligan