Test prop only for cutting

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.

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The relatively flat blades give good performance at those speeds, and excellent take-off performance, but I expected that they would run out of puff at higher speeds compared to the high-helix props like the Bollie and the Kool.  But testing shows this not to be the case, in that at the same manifold pressure settings, the Brolga performed at 86kts, within one knot of both the Warp and the Kool!  The pitch blocks only come in one degree steps.  16º is a bit too fine for cruise, giving WOT 6000rpm, but 17º is over-pitched for best take-off.  Since the Brolga is under-pitched, the rpm for the same manifold pressure setting is higher, but the speed was still the same......  I had expected that this large 4-blade prop would be best at take-off and noticeably slower at such speeds, but it seems not to be the case.......  At WOT it gave 100+ knots, same as all the others, which was really surprising!

Test prop only for cutting

test prop only for cutting


test prop only for cuttingtest prop only for cuttingtest prop only for cuttingtest prop only for cuttingtest prop only for cutting