FIELD: shipbuilding; man-power propellers. SUBSTANCE: oar has loom and blade having form of wing in section. Loom is connected with clamp provided with several grooves. One of grooves is used for receiving the ring connected with tension spring whose other end is connected with hull of boat through turnbuckle. EFFECT: possibility of creating motive force at vertical motion of oar; reduced force of oarsman in recovering oars. 2 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| OAR | 2008 |
|
RU2373105C1 |
| OAR | 2001 |
|
RU2189924C1 |
| TRAINING BOAT | 2004 |
|
RU2276042C2 |
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RU2264326C2 |
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SU1751050A1 |
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RU2724220C1 |
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|
RU2152333C1 |
