NAVYPEDIA

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

Graphics

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.