AKA: Ariane 5 ESC B. Status: In development. Thrust: 153.90 kN (34,598 lbf). Gross mass: 27,500 kg (60,600 lb). Unfuelled mass: 3,400 kg (7,400 lb). Specific impulse: 467 s. Burn time: 700 s. Height: 10.00 m (32.00 ft). Diameter: 5.46 m (17.91 ft). Span: 5.46 m (17.91 ft).