NAVYPEDIA

Ships

Names	Builders	Completed	Losses	Transfers	Discarded
TB99, 100	Thornycroft, Chiswick: TB99, 100	1885: TB99 1886: TB100	none	none	1907: TB99 1908: TB100

Technical data

Displacement normal, t	12
Displacement full, t
Length, m	19.8 oa 19.2 pp
Breadth, m	2.44
Draught, m	1.07
No of shafts	1
Machinery	TB99: 1 2-cyl VC, 1 locomotive boiler TB100: 1 2-cyl VC, 1 Thornycroft water-tube boiler
Power, h. p.	TB99: 189
Max speed, kts	TB99: 16.8
Fuel, t	coal
Endurance, nm(kts)
Armament	2 - 356 TT (bow)
Complement	7

Project history

The concept of purpose-built small TBs capable of being lifted by the davits of large ships seems to have originated with the Royal Navy; certainly more were built for that service than for any other. One TB carrier, Vulcan, was specially built to carry them, and for some years numbers of this type of boat were built. However, in the long run experience showed it was better to use the slower but much sturdier and more seaworthy steam pinnaces for this purpose, rather than the frail specially built Second Class boats.

TB100 was fitted with one of the earliest Thornycroft water-tube boilers, whilst her sister still had a locomotive boiler. It was on these boats that the Thomycroft 'semi-tunnel' stern, with double rudders almost enclosing the propeller, was introduced. This gave them very good turning ability.

Modernizations

None.

Naval service

No significant events.