An 'oar' is often referred to as a blade in the case of sweep oar rowing and as a scull in the case of sculling. A sculling oar is shorter and has a smaller blade area than the equivalent sweep oar. The combined blade area of a pair of sculls is however greater than that of a single sweep oar, so the oarsman when sculling is working against more water than when rowing sweep-oared. He is able to do this because the body action in sculling is more anatomically efficient (due to the symmetry).
Balanced Tear-drop Handle: The handle of the WaterRower M1 LoRise is made of aluminum for strength and lightness, with a tear-drop shape that fits comfortably into the palm of the hand to minimize wrist torque - a common cause of tendonitis. Because of its strength and lightness, the drive strap of the WaterRower M1 LoRise is high-density polyester webbing, guided by nylon pulleys. The drive strap does not wear and is maintenance-free, requiring no messy lubrication.
Outside of resistance type, we found the number-one arbiter of ride feel to be cord quality. Water ergometers tend to employ nylon cords, while air ergometers feature metal chains — a durability factor we anticipated would result in our favoring air. But while all three water rowers aced our expectation of smooth, high-tension strokes, perfecting the chain seems to be more difficult: Some tug with just a slight rumble, others feature bouncy, grinding chains that are incredibly loud, something akin to angry snoring. As for nylon, the best wind and unwind like elastic silk — no slack, no sound, no catching, just perfectly even tension throughout the stroke.