Re: Sculling oar for folkboat?
Dig up a copy of Roger Taylor's Elements of Seamanship. He used a 12 foot oar for sweep and sculling on his 2 ton schooner. He also has the drawing for his 10 foot yuloh that he used on his 32 foot 5 ton Herrshoff in a calm. If you can find Sam Manning's article in WoodenBoat there are drawings for a number of sculling oar options along with some instructions. That article started as an article he and I did for Small Boat Journal which is wafting out there in cyberspace somewhere.
An oar that is optimized for sculling has some real differences from a sweep oar. It is blade heavy and the shaft is slimmed so that its max dimension is in the same plane as the blade. It is flat on bottom and curved on top and has a blade that is relatively much bigger than the one that you normally see: my favorite sculling oar has a 4 foot blade on a 10 foot shaft. If you use a conventional oar you can mount a oarlock socket on your transome and get a large 1 1/2 or 2 oarlock to run it. On the Folkboat I would be tempted to mount a socket on both sides. Facing forward you can use your forward hand to set the blade angle and your body weight to push the oar forth and back.
The advantage of the yuloh is that all you need to do is push it forth and back, the pitch is taken care of automatically by the rope which also balances the blade weight. Your wrist and forearm likes this alot.
Ran Tan, Leste Kuhling, Vernon Langille, Josef W., Merry Mouth, Imp, Macavity and a quiver of unamed 'yaks.
"Bound fast is boatless man."