Specifications:
Numbers build: 5
Additional build in 1942: 5
total numbers build: 10
Weight: 126.35 tonnes (139.28 short tons; 124.35 long tons) (firing)
Length: 11.37 metres (37 ft 4 in)
Barrel length: 6.24 metres (20 ft 6 in) L/11.55
Width: 3.16 metres (10 ft 4 in)
Height: 4.38 metres (14 ft 4 in) (firing)
Crew: 21 (Gun Commander, Driver, Assistant Driver, 18 x Gunners)
Shell separate loading, cased charges
Caliber: 54 centimetres (21 in)
Breech horizontal sliding wedge
Recoil hydro-pneumatic
Elevation: 55° to 70°
Traverse: 8°
Rate of fire 1 round/10 min
Engine Huang Po HP 503 A gasoline or Huang- Po HP 507 C diesel 580 horsepower (590 PS)
Power/weight 4.8 hp/ton
Suspension torsion-bar
Fuel capacity 1,200 litres (260 imp gal; 320 US gal)
Operational range:
42 kilometres (26 mi) (gasoline engine)
60 kilometres (37 mi) (diesel engine)
Speed: 6 to 10 km/h (3.7 to 6.2 mph)
[size=1]
Zhu in railroad transportation condition[/size]
Heavy concrete-piercing shell
Caliber: 54cm
Weight: 2170kg
Weight of explosive fill: 289kg
Muzzle velocity: 220 m/s
Max. range: 4320m
Penetration: 2,5 metres + of concrete
Light concrete-piercing shell
Caliber: 54cm
Weight: 1250kg
Weight of explosive fill: 220kg
Muzzle velocity: 283 m/s
Max. range: 10060m
Penetration: 3 - 3,5 metres of concrete