Test prop 8 week results

A screw thread is a helical structure used to convert between rotational and linear movement or force. The nut rotates and moves linearly along the threads. A screw thread is a ridge wrapped around a cylinder in the form of a helix (thanks Wiki.) Fancy words for a familiar object. The helix of a thread can twist in one of two possible directions. These two directions have a special symmetry known as handedness or chirality (from the greek chiros, or hand.) Our hands are the most common example of this symmetry, leading to the name. [Remember, all of these words are just conventions precisely describing an object so we can communicate about it.] NOW we come to a convention that more directly applies. The threads are oriented so that the threaded item, when seen from a point of view on the axis through the center of the helix, moves AWAY from the viewer when it is turned in a CLOCKWISE direction, and moves toward the viewer when it is turned counterclockwise (again much help from Wiki.) This is assigned the name of a “RIGHT-HANDED” thread, since the objects and motion can be described using the right hand. It should be noted that when using the diagram the head of the bolt would be on the “thumb end” of the vector gripped by the curling fingers showing clockwise rotation of the screw. Remember, this is being viewed from the bottom end of the diagram, so clockwise rotation of the nut carries it away from the viewer and toward the head, eventually resulting in tightening of the nut.

Looking at box stock props, the Trophy is a good but the Pro Max should offer better overall performance and durability. The 8″ jack plate might offer a little better performance when you marry with the right prop. I think the Pro Max, with its tremendous cup wrapped around the blade tips, will give you what you’re looking for with the set back. The Trophy is ″ in diameter. The Pro Max is ″. The props share the same hub size. The Pro Max doesn’t have vent holes nor does it need them. There’s enough exhaust venting over the small hub. The plastic blow out ring fitted over the front of the Trophy would hurt the Pro Max’s planing performance. I think the Pro Max would be a fun prop for your set up.

Test prop 8 week results

test prop 8 week results


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