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FIGHTING SHIPS OF THE WORLD
UNITED KINGDOM
COASTAL FORCES
"BOLD" fast attack craft (torpedo / gun) (BOLD PATHFINDER) (2, 1953)


Photo



Bold Pathfinder 1953 as MGB

Ships


Name No Yard No Builder Laid down Launched Comp Fate
Bold Pioneer (ex-MTB5701) P5701 5415 White, Cowes 1950 18.8.1951 1.1953 sold 1958
Bold Pathfinder (ex-MTB5720) P5720   Vosper, Portchester 1950 17.9.1951 2.1953 sold 1962


100 - 1000 t displacement/ BRT tonnage vessels


Name No Yard No Builder Laid down Launched Comp Fate Bold Pioneer (ex-MTB5701) P5701 5415 White, Cowes 1950 18.8.1951 1.1953 sold 1958 Bold Pathfinder (ex-MTB5720) P5720   Vosper, Portchester 1950 17.9.1951 2.1953 sold 1962

Technical data


Displacement standard, t

130

Displacement full, t

150

Length, m

P5701: 35.4 pp 36.9 oa

P5720: 35.7 pp 37.4 oa

Breadth, m

P5701: 6.20

P5720: 7.80

Draught, m

P5701: 2.00

P5720: 2.10

No of shafts

4

Machinery

2 Metropolitan-Vickers G.2 gas turbines + 2 Mercedes diesels

Power, h. p.

9000+5000=14000

Max speed, kts

16 under diesels

Fuel, t

diesel oil

Endurance, nm(kts)

 

Armament

as gunboats: 2 x 1 - 114/19 Mk I, 1 x 1 - 40/60 Mk 9

as torpedo boats: 1 x 1 - 40/60 Mk 9, 4 - 533 TT

Electronic equipment

presumably type 268 radar

Complement

18



Standard scale images


<i>Bold Pathfinder </i>1963
Bold Pathfinder 1963
<i>Bold Pathfinder </i>1955
Bold Pathfinder 1955


Graphics


<i>Bold Pathfinder </i>1953 as MGB
Bold Pathfinder 1953 as MGB
<i>Bold Pioneer </i>1953 as MGB <i>Many thanks to Wolfgang Stöhr for additional information on this page.</i>
Bold Pioneer 1953 as MGB Many thanks to Wolfgang Stöhr for additional information on this page.


Project history

Experimental prototypes served as test-beds for development of the Gatric gas turbine first installed in MGB2009, although they were initially fitted with ex-S-boat Mercedes diesels, which proved very unreliable. They were an earlier design than the 'Dark' and 'Gay' classes, but were bigger and more seaworthy. They were also very impressive, with twin funnels and lattice foremast. They were both aluminium framed with a wooden shell, butBold Pathfinder had a hull of round bilge form whereas Bold Pioneer had a hard chine hull, the object being to compare the two configurations.

Modernizations

mid-1950s, both: diesels were replaced by Deltic.

Naval service

No significant events.