Elco 77 ft PT-20

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Italian Fleet
P 420 Sparviero Pack
Elco 77 ft PT-20
us_elco_77ft_pt20.png
GarageImage Elco 77 ft PT-20.jpg
Elco 77 ft PT-20
Research:2 900 Specs-Card-Exp.png
Purchase:700 Specs-Card-Lion.png
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Description

GarageImage Elco 77 ft PT-20.jpg


The Elco 77 ft PT-20 is a rank I American motor torpedo boat with a battle rating of 1.7 (AB/RB/SB). It was introduced in Update 1.79 "Project X" as part of the fleet closed beta test.

General info

Survivability and armour

Armourfront / side / back
Hull40 mm (wood)
Superstructure15 mm (wood)
Number of section4
Displacement33 t
Crew15 people

The 77 ft PT-20 has no areas with serious amounts of armour protection. The hull of the vessel consists of 40 mm thick ship wood and the bridge on top is made of 15 mm ship wood. Any projectile that hits will penetrate and deal damage including fragmentation and splash damage from nearby shells. The crew is 15 people which is about average for the PT-20's BR, although any prolonged engagement will likely end in destruction through the loss of the crew. The PT-20 has a total of 4 compartments, 3 for the hull and one for the bridge. The second section of the hull houses the fuel tanks and the third contains the three engines. Damage to the middle of the ship will often set fires or disable the mobility of the PT-20.

Mobility

Speedforward / back
AB106 / 35 km/h
RB76 / 25 km/h
Mobility Characteristics
Weight (tons)
33
Max Speed (km/h)
Mode Stock Upgraded
Arcade 78 106
Realistic/Simulator 65 76

The 77 ft PT-20 is a very quick and agile vessel and is able to reach its top speed in under 15 seconds from a stopped position. A 180° turn can be performed in about 10 seconds when started at full speed, and a complete loop can be made in under 20 seconds. Half rudder deflection is achieved in 2 seconds and maximum deflection in around 10 seconds.

Modifications and economy

Repair costBasic → Reference
AB200 → 245 Sl icon.png
RB220 → 270 Sl icon.png
Total cost of modifications2 980 Rp icon.png
900 Sl icon.png
Talisman cost190 Ge icon.png
Crew training200 Sl icon.png
Experts1 000 Sl icon.png
Aces20 Ge icon.png
Research Aces96 000 Rp icon.png
Reward for battleAB / RB / SB
20 / 20 / 100 % Sl icon.png
100 / 100 / 100 % Rp icon.png
Modifications
Seakeeping Unsinkability Firepower
Mods new ship hull.png
Dry-Docking
Research:
200 Rp icon.png
Cost:
60 Sl icon.png
50 Ge icon.png
Mods new ship rudder.png
Rudder Replacement
Research:
170 Rp icon.png
Cost:
50 Sl icon.png
40 Ge icon.png
Mods new ship screw.png
Propeller Replacement
Research:
370 Rp icon.png
Cost:
110 Sl icon.png
90 Ge icon.png
Mods new ship engine.png
Engine Maintenance
Research:
320 Rp icon.png
Cost:
100 Sl icon.png
70 Ge icon.png
Mods ship tool kit.png
Tool Set
Research:
200 Rp icon.png
Cost:
60 Sl icon.png
50 Ge icon.png
Mods manual ship extinguisher.png
Fire Protection System
Research:
170 Rp icon.png
Cost:
50 Sl icon.png
40 Ge icon.png
Mods engine smoke screen system.png
Smokescreen
Research:
170 Rp icon.png
Cost:
50 Sl icon.png
40 Ge icon.png
Mods new ship pumps.png
New Pumps
Research:
320 Rp icon.png
Cost:
100 Sl icon.png
70 Ge icon.png
Mods tank ammo.png
.50 AP belt
Research:
200 Rp icon.png
Cost:
60 Sl icon.png
50 Ge icon.png
Mods tank ammo.png
.50 APIT belt
Research:
170 Rp icon.png
Cost:
50 Sl icon.png
40 Ge icon.png
Mods new main caliber turrets.png
Primary Armament Targeting
Research:
370 Rp icon.png
Cost:
110 Sl icon.png
90 Ge icon.png
Mods ship art support.png
Artillery Support
Research:
320 Rp icon.png
Cost:
100 Sl icon.png
70 Ge icon.png

Armament

Primary armament

2 х Turret2 x 12.7 mm AN-M2 machine gun
Ammunition4800 rounds
Belt capacity200 rounds
Fire rate577 shots/min
Vertical guidance-5° / 65°
Main article: AN-M2 (12.7 mm)
2x 12.7 mm AN-M2 (x2)
Turrets
Port Turret Starboard Turret
Vertical guidance -5°/+65° -5°/+65°
Horizontal guidance ±180° ±180°
Ammo capacity 9,600
Rounds per turret 4,800

Important to note is the fact that the main armament is unable to aim at targets on the water directly ahead due to the turrets being located just behind the bridge. Off to the side of the vessel, it is possible to aim one or both of the turrets and directly astern it is possible to use both.

Ammunition
Penetration Statistics
Ammunition Type of
warhead
Penetration in mm @ 90°
10m 100m 500m 1000m 1500m 2000m
M20 API-T 31 30 25 21 17 14
M2 AP 33 32 27 23 19 16
M1 I 2 2 1.5 1 0.5 0
Shell Details
Ammunition Type of
warhead
Velocity
in m/s
Projectile
Mass in kg
Fuse delay

in m:

Fuse sensitivity

in mm:

Explosive Mass in g
(TNT equivalent):
Normalization At 30°
from horizontal:
Ricochet:
0% 50% 100%
M20 API-T 887 0.0403 N/A N/A N/A _._° __° __° __°
M2 AP 856 0.046 N/A N/A N/A _._° __° __° __°
M1 I 944 0.041 0.02 0.3 1.2 _._° __° __° __°
Ammunition Belts
Belts Shell Composition
Universal API-T / AP / I / AP
.50 AP API-T / AP / AP / AP
.50 APIT API-T / API-T / API-T / I

The recommend belt to use is the APIT belt. It suffers from a slight penetration penalty compare to AP but gain the ability to set fires.

Torpedo armament

Main article: Mk.8-3 C/D (533 mm)
533 mm Mk.8-3 C/D torpedo
# on ship Mass (kg) Maximum speed
in water (km/h)
Travel distance (km) Depth stroke (m) Arming
distance (m)
Explosive type Explosive mass (kg of TNT equivalent)
4 1379 54 3.65 1.0 50 Torpex 435

Additional armament

Setup 14 x 533 mm Mk.8-3 C/D torpedo

Describe the available additional armaments of the ship: depth charges, mines, torpedoes. Talk about their positions, available ammunition and launch features such as dead zones of torpedoes.

If there is no additional armament, remove this section.

Usage in battles

This boat is difficult to play. The optimal position to maximize your survivability is to have your bow pointing directly at your enemy however that also means you have no guns to fire at them. The optimal position for your guns is to have your rear point at the enemy but it exposes 3 of the 4 sections of the boat(particularly when driving forward at a high speed).

It is recommend you engage enemies by driving directly at them, releasing your torpedoes, then do a 180 and either use your machine guns to fight or smokes to run away.

Other players that prefer to play less aggressively just play the boat constantly in reverse so they can always have guns to fire 'forwards'. Another variant of this playstyle is camping behind an island with all four guns pointed at a high traffic area.

Some players attempt to play the boat as an AA gun but it lacks the vertical elevation to engage planes directly above it and the survivability to take on strafing fighters.

Modules

Tier Seakeeping Unsinkability Firepower
I Dry-Docking Tool Set .50 AP belt
II Rudder Replacement Fire Protection System Smokescreen .50 APIT belt
III Propeller Replacement Primary Armament Targeting
IV Engine Maintenance New Pumps Artillery Support

Pros and cons

Pros:

  • .50 calibre machine guns can effectively deal with just about any opponent it faces.
  • The 21-inch torpedoes can instantly obliterate an enemy ship, given they hit their mark.
  • Decent top speed and acceleration

Cons:

  • .50 cal turrets cannot face forward
  • The arrangement of the torpedoes requires firing from an angle against an enemy.
  • Wooden ship with no armor

History

The 77 ft PT-20 was a follow-on to the first serial production PT boats in the United States, the Elco 70 ft PT-10 series. The PT-20 series was longer and heavier than their predecessors which caused a reduction in speed, although they were given additional torpedo tubes in an effort to increase the firepower. The change to 21 inch (53.3 cm) torpedo tubes up from 18 inch (45.7 cm) was a large addition to weight, and the earlier 70 ft PT boats could not carry the desired amount of torpedo tubes. In late 1941 and early 1942 a total of around 50 of these 77 ft Elco PT boats were produced and these would form the basis for the other widely produced versions such as the Elco 80 ft PT-103.

The ship was layed down on October 14, 1940 by the Electric Boat Co., Elco Works, in Bayonne, New Jersey. It was launched in March 14, 1940, and was completed on June 9, 1941.

It was commissioned on June 20, 1941, and was assigned to Motor Torpedo Boat Squadron TWO (MTBRon 2), as the USS PT-20. MTBRon 2, under the command of Lt. Comdr. Earl S. Caldwell, USN, tested the first 70 ft Elco boats between 1940 and 1941, in the Caribbean. In December of 1941 the squadron received eleven new 77 ft Elco boats, and was moved to the Panama Sea Frontier. On August 13, 1941 the PT-20 was transferred to Motor Torpedo Boat Squadron ONE (MTBRon 1). MTBRon 1, under the command of Lt. William C. Specht, USN, was the first squadron of its kind commissioned, and was originally used for the testing of experimental boats. It was later moved to Hawaii, and it was composed of 77 ft Elco boats. It participated in the Battle of Midway and the Aleutian Campaign.

The USS PT-20 was struck from the Naval Register on December 22, 1944. It is unknown what happened to the ship afterwards.

It had a displacement of 40 t, a length of 77 ft, a beam of 19 ft 11 in, and a draft of 4 ft 6 in. It was powered by three 1,500 shp Packard V12 M2500 gasoline engines, and it had three shafts.The armament consisted of two twin .50 cal. Browning M2 machine guns in Dewandre turrets, two .303 cal. Lewis machine guns and four 21" torpedoes. The crew complement was 15 sailors and officers, and the ship had a maximum speed of 41 knots.

Media

See also

  • Elco 80 ft PT-103: Elco's successor to the 77 ft PT-20 series, and one of the most widely produced versions of the PT boats in World War II

Bibliography

External links

Paste links to sources and external resources, such as:

  • topic on the official game forum;
  • encyclopedia page on ship;
  • other literature.


Electric Launch Company (Elco) Ships
Motor Torpedo Boats (PT) 
77' PT  Elco 77 ft PT-20 · Elco 77 ft PT-59
80' PT  Elco 80 ft PT-103 · Elco 80 ft PT-109 · Elco 80 ft PT-314 · Elco 80 ft PT-556 · Elco 80 ft PT-565

USA boats
Motor torpedo boats  58 ft PT-3 · 89 ft PT-810 · 94 ft PT-811 · Elco 77 ft PT-20 · Elco 80 ft PT-103 · Elco 80 ft PT-109 · Elco 80 ft PT-314 · Elco 80 ft PT-556
  Elco 80 ft PT-565 · Higgins 78 ft PT-200 · Higgins 78 ft PT-71 · Higgins 81 ft PT-6
Motor gun boats  80 ft Nasty · Elco 77 ft PT-59 · PGH-2
Motor torpedo gun boats  Asheville (PGM-84) · LCS(L)(3)