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Jon and V Boat Conversions & Modifications
Finally getting a new (to me) tin boat, a 1436
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<blockquote data-quote="Rat" data-source="post: 108563" data-attributes="member: 1914"><p>The dent is on the planing surface and *could* cause some porpoising. I say *could* because it doesn't look that bad. A dent that is like that is called rocker, even though rocker usually describes a condition where there is a noticeable bulge outward all the way across the bottom of the hull from port to starboard. A small area like this may or may not cause problems and it's not that easy to fix. You can try using a dead blow hammer and a dolly to work it out but you will probably find that the metal has significant expansion. In that case the spot will pop inward creating a hook. You could probably take up the extra material in the strakes, this would deform the side of the strakes a little bit, but not effect the performance as much (or at all) as hook or rocker. </p><p></p><p>This small area will cause aeration of the water leaving the hull as well; so I would not mount a sonar transducer near it or you will get bubbles across the beam leading to crappy readings while on plane. It's hard enough to find clear water on a riveted hull anyway. </p><p></p><p>I would leave it and test it before I attempted to fix it if I were you. If it causes significant performance problems then I would look into getting it fixed. At that point I would recommend cutting it out and patching it with a new piece. </p><p></p><p>Good weight distribution and a Dol-Fin will proly correct any performance problems created by this small rocker. </p><p></p><p>In the future tho use a piece of wood to absorb the shock and distribute the weight of the battery; don't set it right on the hull bottom. But I bet you have already figured that out.</p></blockquote><p></p>
[QUOTE="Rat, post: 108563, member: 1914"] The dent is on the planing surface and *could* cause some porpoising. I say *could* because it doesn't look that bad. A dent that is like that is called rocker, even though rocker usually describes a condition where there is a noticeable bulge outward all the way across the bottom of the hull from port to starboard. A small area like this may or may not cause problems and it's not that easy to fix. You can try using a dead blow hammer and a dolly to work it out but you will probably find that the metal has significant expansion. In that case the spot will pop inward creating a hook. You could probably take up the extra material in the strakes, this would deform the side of the strakes a little bit, but not effect the performance as much (or at all) as hook or rocker. This small area will cause aeration of the water leaving the hull as well; so I would not mount a sonar transducer near it or you will get bubbles across the beam leading to crappy readings while on plane. It's hard enough to find clear water on a riveted hull anyway. I would leave it and test it before I attempted to fix it if I were you. If it causes significant performance problems then I would look into getting it fixed. At that point I would recommend cutting it out and patching it with a new piece. Good weight distribution and a Dol-Fin will proly correct any performance problems created by this small rocker. In the future tho use a piece of wood to absorb the shock and distribute the weight of the battery; don't set it right on the hull bottom. But I bet you have already figured that out. [/QUOTE]
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Jon and V Boat Conversions & Modifications
Finally getting a new (to me) tin boat, a 1436
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