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UNITED STATES OF AMERICA

 

COASTAL FORCES

 

PT20 motor torpedo boats (1941-1942)

PT20 1941

Names

PT20 - 68

Builders

ELCO, Bayonne: PT20 - 68

Commissioned

6-9/1941: PT20 - 48

1-3/1942: PT49 - 68

Losses

PT22 (12.1.1943), PT28 (12.1.1943), PT31 (19.1.1942), PT32 (13.3.1942), PT33 (26.12.1941), PT34 (9.4.1942), PT35 (12.4.1942), PT37 (1.2.1943), PT41 (15.4.1942), PT43 (11.1.1943), PT44 (12.12.1942), PT63 (18.6.1944), PT67 (17.3.1943), PT68 (1.10.1943)

Transfers

United Kingdom, 1-3/1942: PT49 - 58 (MTB307 - 316)

Discarding

10/1943: PT21, 23, 25, 26

2 - 12.1944: PT20, 24, 27, 29, 30, 36, 38 - 40, 42, 45 - 48, 59 - 61

1/1945: PT62, 64 - 66

 

Displacement standard, t

35

Displacement full, t

46

Length, m

23.5

Breadth, m

6.07

Draught, m

1.37

No of shafts

3

Machinery

3 petrol engines

Power, h. p.

4050

Max speed, kts

41

Fuel, t

petrol 11400 l

Endurance, nm(kts)

1400 ()

Armament

PT20 - 44: 2 x 2 - 12.7/90, 4 - 533 TT or (2 - 533 TT, 2 DCR (8))

PT45, 59 - 68: 1 x 1 - 20/70 Mk 4, 2 x 2 - 12.7/90, 4 - 533 TT or (2 - 533 TT, 2 DCR (8))

PT46 - 48: 1 x 1 - 20/70 Mk 4, 2 x 2 - 12.7/90, 1 x 1 - 7.6/90, 4 - 533 TT or (2 - 533 TT, 2 DCR (8))

PT49 - 58: 1 x 2 - 12.7/62; 2 x 2 - 7.7/83, 2 - 533 TT

Complement

17

Project history: ELCO 77ft type. Development of 70ft type (10 boats were built, all were transferred to RN by lend-lease). At the expense of dimensions increasing the number of TTs has increased from two to four.

Modernizations: 1941, PT20 - 27, 29, 36 - 40, 42 - 45: + 1 x 1 - 7.6/90

1941, PT31 - 35, 41: + 2 x 1 - 7.7/83

1942, PT22, 24, 26, 27: + 1 x 1 - 20/70 Mk 4

1942, PT65 - 68: + 1 x 1 - 7.6/90

1943, PT59 - 61: - 4 - 533 TT; + 2 x 1 - 40/56 Mk 1.2, 6 x 2 - 12.7/90

Naval service: No significant events.

PT31 1941

© Ivan Gogin, 2014