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Forum: Engines & props 28 July 2019, 14:12
Replies: 34
Views: 7,015
Posted By jonp
Sorry, I wasn't referring to different pressure...

Sorry, I wasn't referring to different pressure in tubes, I was referring to different sea conditions between testing, as chop reduces surface tension ( air under hull ). When I head offshore in the...
Forum: Engines & props 27 July 2019, 04:07
Replies: 34
Views: 7,015
Posted By jonp
The physics behind drag is air reduces drag, so a...

The physics behind drag is air reduces drag, so a light chop will increase your performance. My last boat had a slotted hull which created its own steam of air cutting down surface friction,...
Forum: Engines & props 25 July 2019, 14:04
Replies: 34
Views: 7,015
Posted By jonp
Is there possibly water underfloor adding extra...

Is there possibly water underfloor adding extra weight. I lose a little fuel economy in calm conditions due to water surface drag, were each of the sea conditions you measured the economy from the...
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