Oar Brochure 2015
3Pages

DURHAM Durham, NH 03824 +1 (603) - 659-7575INC. BOAT COMPANY, 220 Newmarket Rd., Carbon Sculls Dreher Models: : Dreher offers oars covering the full range of scullers from top elite athletes to entry level recreational scullers and serious open water enthusiasts. The complete Dreher Scull System was designed to optimize performance. Dreher oars are all carbon, light-weight, rigid, and built to last. The sculls come in four broad categories combining shaft type, blade shape, stiffness, handle / grip type and sleeve/lock types: • Aerodynamic – EH, EHX and in ‘14 the EA & EAX • High Modulus – ApexX (See Below), REX (See Below), BBX seamless, as compared with competitors shaft to blade stem transition, which is abrupt and catches water creating drag re­ istance at the finish of every stroke. As a result, the overall s performance of Dreher oars are superior, where less effort makes blade extraction easier creating less drag and allowing more energy to be available during the drive. This translates into more speed on the recovery and greater average boat speed. Adjustable Length Feature: The adjustable “carbon on carbon” design eliminates the possibility of movement because the handle is precisely constructed to tightly fit into the straight part of the shaft. All adjustable oars have measurement decals that show total length and outboard settings, which easily derive the inboard setting. All adjustable sculls and sweeps have a total of 10 cm of adjustment. (+/- 5cm from the midpoint setting) Why An Aerodynamic Shaft/Blade Combo? • Hybrid Modulus – Alpha • Standard Modulus – Apex, BB, LBB, RE and LS19 • Club, Recreational & Youth – ApexR, LBB, Macon17, 18 & LS1999 Why Dreher? Dreher is an innovative leader in integrated modular oar design. We were the innovator of the adjustable length oar in 1991, wooden veneer over carbon sweep oar handles in the mid1990’s, higher aspect ratio (wider blades) in 2000. The first aerodynamic oar shape blade/shaft 2009, EH combo in 2013 and the EA in 2014. We have been developing lock/sleeve combos: The first allows you to row with the lock facing in the normal forward direction or in the reverse position (behind the pin). Rick Horan’s Roller Lock™ is a carbon swivel with centered shaft rotation and a cam action that when used in the reverse position provides a virtual variable spread. The gearing is lighter at the start and sprint (when combined with a normal abbreviated stroke length) and easier acceleration to the finish. When the boat and the angular velocity of the blade tip are each going the fastest, during the recovery the combined velocity make an aerodynamic shape attractive. An elliptical shape with aerodynamic transition from shaft to blade end is desirable as well as a hydrodynamic shape though the water. All these speed enhancing issues must be addressed to make the most efficient high performance oar design. See the chart on the next page: (Bottom Right) Why EH/EHX or EA/EAX? Both the Dreher Aerodynamic Sculls share one main features: The elliptical shaft/ blade slices through the air during the fastest part of the stroke with less drag. The improved overall efficiency is most noticeable at race pace, in boats with higher boat speed and with highly skilled scullers. The high modulus sculls are a derivation of adjustable length sculls, used in only our most competitive blades that use less carbon to achieve your desired shaft stiffness. The use of high modulus carbon on the inside of the shaft with the twill on the outer surface looks and performs exceptionally well. Both the standard and high modu­us adjustable (X) sculls feature l the choice of three handle sizes, three levels of shaft stiffness, choice of average oar length/inboard, multiple grip and color options as well as several sleeve options. See comparison of the EH (Yellow/orange) versus the EA blade shape (red). Continual Innovation: A new Dreher designed collar/sleeve system allows easy inboard and outboard adjustment, without tools when using conventional oar locks. Both lock systems share the same carbon “rail” which replaces the current sleeve. All shafts are autoclave cured at high temperature and pressure for maximum strength, durability and longevity. All blades, locks and other small components are “match metal” molded using a unique bilateral composite molding process. The completely adjustable system allows for custom tuning of length, handle size, blade type and blade pitch. They provide you and your crews with versatility and high performance. Only the best construction materials are used to make Dreher Oars and Sculls. All the major components are made using prepreg carbon. Blades are uniquely manufactured using a sandwich core construction of prepreg carbon and specially formulated syntactic foam. The transition point between the blade stem and shaft is nearly The EA or EAX sculls seem to be the choice of those people who liked the Apex shape and the original Aero shape, whereas the EH or EHX appears to interest the people that grew up on Macon and then may have migrated to the ApexR, RE, or the high modulus version of either.

Tool Free Adjustable Collar/Sleeve Design: Durham Boat Company is proud to announce an innovative collar, sleeve, combination designed by Micheal Dreher. This innovation allows a movable bearing surface coupled to collar to be adjusted along a underlying sleeve. The collar can be adjusted anywhere including on-the-water without the use of a separate tool such as a screw driver. This adjustment mechanism is self-contained, continuously adjustable throughout the range of the sleeve, and becomes a permanent structural part of the oar. There is 10 cm of adjustment. For each 360 degree turn of...

Sweep Successes: Dreher Sweeps for the past four years Carbon Sweep Oars Sweep Design and Features: Dreher was the first have been used at Junior World Rowing Championships. In those four year the Junior Women have won 8 medal out of a possible 12 medals. manufacturer to design a sweep oar with a carbon adjustable handle (+/-5 cm) in 1991. This carbon handle resulted in a weight savings of about one pound per oar over a wood handle. The BB52, traditional hatchet shape and the Apex55 and Apex52 have been the most popular sweep blades offered. All sweep oar shafts are roll wrapped and...