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Calculated Prop Slip on Jon Boats - What is a reasonable?
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<blockquote data-quote="Go Fish" data-source="post: 213380" data-attributes="member: 6062"><p>10% slip is not unrealistic. My big boat (22 foot center console/250 Suzi) has a prop slip of 6% at cruise and at WOT (on glassy smooth water). She is a big heavy deep-v boat to boot.</p><p></p><p>My understanding is that it is substantially easier to get low slip numbers and the weight of the boat and/or the underway wetted hull fraction decreases. This makes intiutuve sense, prop slip occurs because of the forces opposing the forward motion of the boat. If you decrease those forces, in this case boat mass and drag on the wetted portion of the hull, it is easier for the boat to move forward and the prop slips less.</p><p></p><p>I'm curious now to figure out what the slip is on my tin boat. I've got a tiny tach in the garage that I'll have to install...</p></blockquote><p></p>
[QUOTE="Go Fish, post: 213380, member: 6062"] 10% slip is not unrealistic. My big boat (22 foot center console/250 Suzi) has a prop slip of 6% at cruise and at WOT (on glassy smooth water). She is a big heavy deep-v boat to boot. My understanding is that it is substantially easier to get low slip numbers and the weight of the boat and/or the underway wetted hull fraction decreases. This makes intiutuve sense, prop slip occurs because of the forces opposing the forward motion of the boat. If you decrease those forces, in this case boat mass and drag on the wetted portion of the hull, it is easier for the boat to move forward and the prop slips less. I'm curious now to figure out what the slip is on my tin boat. I've got a tiny tach in the garage that I'll have to install... [/QUOTE]
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Calculated Prop Slip on Jon Boats - What is a reasonable?
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