www.PSFmagazine.com | March-April 2018 | 23 22 | March-April 2018 | Powered Sport Flying Trike Upgrades that rests over the prop blade for the pitch adjustment. This protractor also has a level at the top so that you can make sure the blade is level while you set the pitch angle. You measure 15.75 inches out from the blade base and mark it, so that your protractor is in the same position when adjusting the pitch for all four blades. The bolts use Nordlock washers, so no safety wire is needed after torque is set, and the washers can also be reused. Performance and Reduced Load on the Engine The blades and the prop hub are both made of carbon fiber. On the Excalibur model, the 70-inch-long blades are very thin and lightweight. When starting a 912 with most props, the gearbox chatters loudly until the prop RPM catches up with the engine. The startup with the Excalibur prop is very easy on the gearbox, as the engine sees very little of a load from the prop. The unique dihedral hub design angles the blades forward and uses centrifugal force to counter the effects of blade flex under load. The tolerance for the pitch setting is .3 degrees plus or minus from the desired pitch angle. The closer that you can pitch the angle on every blade will make the running smoother, which is great for the engine gearbox and aircraft performance. I should see an increase in my rate of climb and a shorter takeoff distance, which adds to safety on departure. Cost and Delivery The cost of a 4-bladed prop and spinner was $2250 including shipping, and was shipped from France directly to my house. It came very well-packaged and arrived with no damage to the contents. Many Revo pilots and some Airborne owners also have swapped out their older Sensenich props for the Excalbur props and are really enjoying the way they fly. They are used in many of the Rotax engine 912 versions as well as on trikes, gyrocopters, airplanes, and paramotors. For more information and the link to Larry’s interview and installation videos can be found at: http://evolutiontrikes.com/e-props/ • Support Our Advertisers
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