I still say disabling formation would take care of the problem. A lanc formation could carry over double the B-29's load. And a formation of B-24's could carry 2000lbs more. So no one can complane that it would be uber except for it's 20mm's.
Specifications (Lancaster)
Crew: 7: pilot, flight engineer, navigator, bomb aimer, wireless operator, mid-upper and rear gunners
Length: 69 ft 5 in (21.18 m)
Wingspan: 102 ft (31.09 m)
Height: 19 ft 7 in (5.97 m)
Wing area: 1,300 ft² (120 m²)
Empty weight: 36 828 lb (16,705 kg)
Loaded weight: 63,000 lb (29,000 kg)
Powerplant: 4× Rolls-Royce Merlin XX V12 engines, 1,280 hp (954 kW) each
Performance
Maximum speed: 240 kn (280 mph, 450 km/h) at 15,000 ft (5,600 m)
Range: 2,700 nmi (3,000 mi, 4,600 km) with minimal bomb load
Service ceiling: 23,500 ft (8,160 m)
Wing loading: 48 lb/ft² (240 kg/m²)
Power/mass: 0.082 hp/lb (130 W/kg)
Armament
Guns: 8× 0.303 in (7.7 mm) Browning machine guns in three turrets, with variations
Bombs: Maximum normal bomb load of 14,000 lb (6,300kg) or 22,000 lb Grand Slam with modifications to bomb bay.
Specifications (B-29)
Boeing B-29 SuperfortressData from Quest for Performance
General characteristics
Crew: 11: (A/C)Airplane Commander, Pilot, flight engineer (a rated pilot), bombardier, navigator, radio operator, radar operator, blister gunners (two), CFC upper gunner, and tail gunner
Length: 99 ft 0 in (30.2 m)
Wingspan: 141 ft 3 in (43.1 m)
Height: 29 ft 7 in (8.5 m)
Wing area: 1,736 sqft (161.3 m²)
Empty weight: 74,500 lb (33,800 kg)
Loaded weight: 120,000 lb (54,000 kg)
Max takeoff weight: 133,500 lb (60,560 kg -- 135,000 lb plus combat load (144,000 lb on record))
Powerplant: 4× Wright R-3350-23 and 23A turbosupercharged radial engines, 2,200 hp (1,640 kW) each
* Zero-lift drag coefficient: 0.0241
Drag area: 41.16 ft² (3.82 m²)
Aspect ratio: 11.50
Performance
Maximum speed: 357 mph (310 knots, 574 km/h)
Cruise speed: 220 mph (190 knots, 350 km/h)
Stall speed: 105 mph (91 knots, 170 km/h)
Combat range: 3,250 mi (2,820 nmi, 5,230 km)
Ferry range: 5,600 mi (4,900 nmi, 9,000 km, (record 5,839 mi, 5,074 nmi, 9,397 km))
Service ceiling: 33,600 ft (10,200 m)
Rate of climb: 900 ft/min (4.6 m/s)
Wing loading: 69.12 lb/sqft (337 kg/m²)
Power/mass: 0.073 hp/lb (121 W/kg)
Lift-to-drag ratio: 16.8
Armament
Guns:
10× .50 in (12.7 mm) caliber Browning M2/ANs in remote controlled turrets
2 x .50 in and 1× 20 mm M2 cannon in tail position
B-29B-BW - All armament and sighting equipment removed except for tail position; initially 2 x .50 in M2/AN and 1× 20 mm M2 cannon, later 3 x 2 x .50 in M2/AN with APG-15 gun-laying radar fitted as standard.
Bombs: 20,000 lb (9,000 kg) standard loadout
Should say it all...