This was a variation of the previous 6"/47 (15.2 cm) Mark 16 and was used only on the Erie (PG-50) class of Patrol Gunboats. Unlike the Mark 16, the Mark 17 was designed for bag ammunition.
The mountings for these weapons were unusual for this type of ship, as they had power elevation and training.
Constructed of a chrome-platted autofretted barrel attached to a breech housing by interrupted threads. Used a side-swing breech mechanism.
| Designation | 6"/47 (15.2 cm) Mark 17 |
|---|---|
| Ship Class Used On | Erie Class |
| Date Of Design | 1933 |
| Date In Service | 1938 |
| Gun Weight | 5.24 tons (5.32 mt) |
| Gun Length oa | 289.0 in (7.341 m) |
| Bore Length | 282.3 in (7.169 m) |
| Rifling Length | about 238.3 in (6.053 m) |
| Grooves | N/A |
| Lands | N/A |
| Twist | Uniform RH 1 in 30 |
| Chamber Volume | 1,478 in3 (24.22 dm3) |
| Rate Of Fire | 5 - 8 rounds per minute |
| Type | Bag |
|---|---|
| Projectile Types and Weights | Common Mark 28 Mods 1 and 2: 105 lbs. (47.6 kg)
Illum Mark 22 Mod 1: 95.40 lbs. (43.3 kg) Illum Mark 23 Mods 1 and 2: 96.0 lbs. (43.5 kg) |
| Bursting Charge | Common Mark 28 Mods 1 and 2: 5.72 lbs. (2.6 kg) Explosive D |
| Projectile Length | 27 in (68.6 cm) |
| Propellant Charge 1 | 34.0 lbs. (15.4 kg) SPD or SPDN |
| Muzzle Velocity | Common: 2,800 fps (853 mps) |
| Working Pressure | 18.5 tons/in2 (2,910 kg/cm2) |
| Approximate Barrel Life | 750 - 1,050 rounds |
| Ammunition stowage per gun | N/A |
- ^Propellant was in a single bag.
- Bourrelet diameter was 5.985 inches (15.2 cm).
| Elevation | Range | Angle of Fall | Time of Flight | Striking Velocity | Maximum Ordinate |
|---|---|---|---|---|---|
| 2.79 degrees | 6,000 yards (5,490 m) | 3.63 degrees | 7.87 seconds | 1,882 fps (574 mps) | 249 feet (759 m) |
| 5.72 degrees | 10,000 yards (9,140 m) | 8.88 degrees | 15.16 seconds | 1,447 fps (441 mps) | 935 feet (285 m) |
| 12.86 degrees | 16,000 yards (14,630 m) | 23.57 degrees | 30.25 seconds | 1,106 fps (337 mps) | 3,810 feet (1,161 m) |
| 20.33 degrees | 20,000 yards (18,290 m) | 36.52 degrees | 43.44 seconds | 1,072 fps (327 mps) | 7,990 feet (2,435 m) |
- ^Values for HC Mark 13 from BuOrd OP 1188 page 22.
"Naval Weapons of World War Two" by John Campbell
"US Cruisers: An Illustrated Design History" and "US Naval Weapons" both by Norman Friedman
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"Abridged Range Tables for U.S. Naval Guns - Ordnance Pamphlet No. 1188 - 13 June 1944" by Bureau of Ordnance (BuOrd), Department of the Navy
"U.S. Explosive Ordnance - Ordnance Pamphlet No. 1664 - May 1947" by Bureau of Ordnance (BuOrd), Department of the Navy
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Gene Slover's Navy Pages
18 May 2007 - Benchmark
10 January 2019 - Converted to HTML 5 format, reorganized notes and added mounting sketch
03 August 2020 - Minor changes
01 August 2023 - Revised range table