The 5432 has a max RPM of 2800. With a Michigan Sailor prop I cruise at 2300 or so, 6 knots. At 2500-2700 I get 7 knots, although the stern buries. I don't really need a low-drag prop, but have wondered if my performance could be improved. I concluded, not much.
Here's a recent response from Campbell props, which seems a good fixed alternative on the 381.The difference in shape is quite apparent:
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For a Campbell Sailer (3 blade fixed) I would suggest RH 16x8.
This recommendation assumes an Ericson 381 on the Universal 5432 engine (32hp @ 2800 RPM max). We’re assuming a Hurth HBW-50 transmission with a ratio of 2.05 to 1. Shaft diameter is 1.0 inch and rotation at the prop is RH. Please advise if different.
If you have a different transmission make, model or ratio optimal prop size might be different. If unknown transmission details can usually be found on the information plate on the side of the transmission.
The Campbell Sailer has cupped blades and a leading edge foil. This increases prop efficiency converting a larger percentage of available HP directly into thrust. As a result we often size smaller than other manufacturers for a given installation.
The Campbell Sailer offers the perfect balance between powering, maneuvering and low drag performance. It's the lowest drag fixed 3 blade on the market. Up to 35-40% less drag when compared to equivalent size units from other manufacturers. The Campbell prop is renown for how smooth it runs throughout the entire RPM range.
Pricing is USD $795.00. Freight on DHL Express (4-5 business days) is USD $54.00. Manufacturing time is approximately 10-12 business days on order.
Smooth sailing,
Kelsey
West by North Industries
778-802-4202
Oct 10, 2022