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| Names | Builders | Completed | Losses | Transfers | Discarding |
|---|---|---|---|---|---|
I (Yard no 32) |
Thornycroft, Chiswick, UK: I |
1875: I |
none |
none |
1907: I |
| Displacement normal, t | 8 |
|---|---|
| Displacement full, t | 10 |
| Length, m | 20.7 |
| Breadth, m | 2.61 |
| Draught, m | 1.23 |
| No of shafts | 1 |
| Machinery | 1 VSE, 1 locomotive boiler |
| Power, h. p. | 184 |
| Max speed, kts | 18 |
| Fuel, t | coal |
| Endurance, nm(kts) | |
| Armament | 2 spar torpedoes |
| Complement | 9 |
Thornycroft-built prototype, launched 19.6.1875. In service the boat reached only 13kts at 90hp.
1893: - spar torpedoes; + light gun
In 1893 Torpedoboot I was transferred to Danube Flotilla to serve as patrol boat.

