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Recently following a thread on RSR I did some research into the three major oar manufacturers and what they say about how their oars and sculls perform in a deflection test. when a 10kg weight is hung from the neck of the blade. This gives a comparison of the relative stiffness of each design.
| Scull & Oar Deflection tests | |||||
| Soft | Medium | Stiff | |||
| Sculls | C2 | 5.15 +/- .25cm* |
4.55 +/- .25cm* | 3.95 +/- .25cm* | |
| Dreher | 3.4 cm | 2.9 cm | 2.4 cm | ||
| Sweeps | C2 | 4.45 +/- .25cm* |
3.85+/- .25cm* | 3.25 +/- .25cm* | |
| Dreher | n/a | 3.6 cm | 3.0 cm | ||
| Croker | |||||
| S2 scull | 6.5 – 8.5 cm Deflection at Tip | ||||
| S3 scull | 6.9 – 9.0 cm Deflection at Tip | ||||
| M2 Sweep | 5.0 – 6.5 cm Deflection at Tip | ||||
| * Stiffness is measured in terms of the deflection in the oar when a 10kg weight is hung from the neck |
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| ** Croker measures deflection at the tip not the neck. |
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Sources: Concept 2 and Dreher. Croker came from their NZ distributer. I couldn't find deflection data anywhere else.
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