SDP wz 66 Grom (Poland, Tier-8, TD, premium, mechanics: a gun with a deep rifled barrel)
Historical reference:
Anti-tank self-propelled gun SDP wz 66 Grom from the late 50s – early 60s, designed taking into account the Soviet experience in developing such vehicles. The armor was supposed to withstand hits from existing and future NATO tanks, and a gas turbine engine was supposed to be used to increase mobility. Several types of guns were considered as weapons, including the so-called. “deep-cut”. It turned out to be impossible to implement some of the ideas due to technological limitations of the time. All developments remained on paper.
Performance characteristics that are affected by a gun with a deep rifled barrel:
162 mm:
• Damage 1 (APCR) of a projectile at a distance <50m: 700
• Damage 1 (APCR) from a projectile at a distance >500m: 350
• Damage 2 (APCR) from a projectile at a distance <50m: 700
• Damage 2 (APCR) from a projectile at a distance >500m: 350
Firepower:
• Projectile type 1: APCR
• Armor penetration of 1 (APCR) projectile: 260 mm
• Armor penetration of 1 (APCR) projectile at 500m: 230 mm
• Initial flight speed of 1 (APCR) projectile: 1400 m/s
• Damage 1 (APCR) of a projectile at 50m: 700
• Average damage per minute 1 (APCR) with a projectile at 50m: 2826
• Damage 1 (APCR) with a projectile at 500m: 350
• Average damage per minute 1 (APCR) with a projectile at 500m: 1413
• Damage by module 1 (APCR) with a projectile at 50m: 203
• Damage by module 1 (APCR) with a projectile at 500m: 101
• Cost of 1 (APCR) projectile: 1450 credits
• Projectile type 2: APCR
• Armor penetration of 2 (APCR) projectile: 290 mm
• Armor penetration of 2 (APCR) projectiles at 500m: 270 mm
• Initial flight speed of 2 (APCR) projectile: 1600 m/s
• Damage 2 (APCR) with a projectile at 50m: 700
• Average damage per minute 2 (APCR) with a projectile at 50m: 2826
• Damage 2 (APCR) with a projectile at 500m: 350
• Average damage per minute 2 (APCR) with a projectile at 500m: 1413
• Damage by module 2 (APCR) with a projectile at 50m: 203
• Damage by module 2 (APCR) with a projectile at 500m: 101
• Cost of 2 (APCR) projectile: 5200 credits
Rate of fire (rounds/min): 4.04
Loading of the gun (sec): 14.86
Gun Traverse Speed (deg/s): 27.12
Hull Traverse Speed (deg/s): 33.38
Gun elevation/depression (deg): -7/15
Aiming time (sec): 2.59
Accuracy at 100 m: 0.38
Average damage per minute: 2,826
Strength (HP): 1,400
Hull Armor (frontal/side/rear in mm): 120/70/40
Track Repair time (sec): 12.03
Weight / maximum weight of the machine(t): 51/55
Engine power (hp): 750
Specific power (hp/t): 14.71
Max. speed/reverse (km/h): 40/15
Stationary vehicle camo (%): 16.59/2.37
Camo in motion (%): 9.98/1.43
View Range (m): 370
Crew 4 people: Commander (Radio Operator); Gunner; Driver; Loader.
