Dreher Elliptical Sculls are offered with two distinct blade designs. Our Elliptical Aerodynamic (EA) and our Elliptical Hydrodynamic (EH). In addition, the sculls are offered in both our Standard Modulus construction and our High Modulus twill construction. All of our High Modulus sculls are indicated with the additional letter “X” in their description. Both designs incorporate a traditional roll wrapped shaft that transitions from a standard circular shape at the handle end to an elliptical shape as the shaft approaches the blade. This transition to an elliptical shape significantly reduces the impact of drag while the oar is on the recovery. Airflow around an elliptical shape is significantly improved as opposed to a circular shape.
Elliptical Hydrodynamic (EH): The hydrodynamic theory plus prior racing blade performance models inspired the high aspect ratio design of our Elliptical Hydrodynamic sculls. The blade shape is narrowest by the blade/shaft interface and then increases in surface area and width towards the tip of the blade. By optimizing the aspect ratio of the blade design we have been able to create a blade that takes into account the various forces on the blade during the drive phase allowing for, what we believe to be, a cleaner and smoother stroke.
Elliptical Aerodynamic (EA): This oar design resembles a traditional hatchet shape, but has been modified to optimize aerodynamic advantages. The smooth surface of the blade promotes a clean catch. While our seamless blade-to-shaft transition allows for a cleaner extraction at the release creating less turbulence in the water. If you have used traditional hatchet shaped blades in the past, you will find our Elliptical Aerodynamic sculls maintain a similar feel with the added benefits of reduced drag.
Our Tool-Free Adjustment system is offered on all adjustable-length sculls. This feature is an additional option that allows for quick on the water adjustment.