Perfect Length Oars? Measurements Needed!
Do you think the length of your oars is perfect? I am working on an oar sizing formula. Please provide the following three measurements to help out:
1) Span of your boat from Oarlock to Oarlock
2) Distance apart (or overlap) of your oar handles if they are pointed straight at each other
3) Total length of your oars including handle and blade.
The old rafters formula is one part inboard and two parts outboard, but I think this is a bit off for narrower boats. Van Claussen's formula was developed for fixed-seat rowing skiffs and dictates an ideal 7:18 leverage ratio for maximum efficiency, but this too seems a little off.
The more data points I can get, the better. I will post the results when I'm finished. I am aware of the secondary concerns related to ideal handle height, not reaching too far into eddy water, and 25ish degree similar triangles.
Any other info you can provide on other lengths you have tried that didn't work, secondary considerations, etc... is appreciated.