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Prop slip increase with speed.


Prop slip increase with speed.

Old 01-08-2015, 08:48 AM
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One thing I was thinking about last night is that Formula put a large mushroom thru-hull under the starboard engine. This is for the overboard discharge of the head. I've always wondered why they put it there. To me at speed, it would seem that it would act as a brake. Not only slowing me down but also making the hull surface asymmetrical. I'm curious if this could be causing the props to slip a bit and to be causing the starboard pull at higher speeds?

Sailboat racers always remove mushroom thru-hulls and replace them with flush thru-hull and then fair them in so they are perfectly smooth. If they are worried about the drag at 6-8 mph, then what are they doing at 60-70 mph? I think this is at the issue!
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