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Su-27SK: takeoff weights and G limits

Thought some of you might find this interesting. From the Russian Su-27SK flight manuals;

Maximum takeoff weight: 33,000 kg
(when KN-41 wheel with model 017A tyre and KT-156D wheel with model 2A tyre are installed)
Maximum takeoff weight: 28,000 kg
(when KN-27 wheel with model 016A tyre, KT-156D wheel with model 2A tyre are installed)
Design takeoff weight – 23250 kg (2 x R-27 + 2 x R-73E, 5090 kg internal fuel, full non-removable equipment suite,150 rounds for gun).
Takeoff weight (2 x R-27 + 2 x R-73E, 9220 kg internal fuel (density = 0.785) – 27,380 kg
Maximum weight of R-27 and R-73E missiles – 1950 kg

Maximum service G at design flight weight of 21,400 kg
G max = 8.0 at M < 0.85
G max = 6.5 at 0.85 < M > 1.25
G max = 7.0 at M > 1.25

For weights differing from the design flight weight, G is
established from the conditions :

Weight x G max = 171,000kg at M < 0.85, G limit = 9.0
Weight x G max = 139,000kg at 0.85 < M > 1.25, G limit= 7.0
Weight x G max = 150,000kg at M > 1.25, G limit = 7.5

From this it is clear the Su-27 can only pull 9G at under Mach 0.85 and at a weight of 19,000kg or less (171,000/9=19,000kg). Working back from the normal takeoff weight of 23250 kg we need to lose 4250kg, as we want to keep our 4 AAMs and ammo that means we must be down to around 840kg fuel, just 17% of our (already reduced) fuel load to be allowed to pull 9G.

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