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FIGHTING SHIPS OF THE WORLD
UNITED STATES OF AMERICA
COASTAL FORCES
"ELCO 77-ft" torpedo boats (PT20) (1941 - 1942)


Photo



PT31 1941

Ships


Names Builders Commissioned Losses Transfers Discarding

PT20 - 68

ELCO, Bayonne: PT20 - 68

6-9/1941: PT20 - 48

1-3/1942: PT49 - 68

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)

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

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



Technical data


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



Graphics


<i>PT31</i> 1941
PT31 1941


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.

© Ivan Gogin, 2014