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#1
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Ok. here is the question... I really can't seem to picture a 20 foot
skiff on plane trying to figure out appx what angle of pitch it will travel through the water at.. I can't imagine any more than 3-5 degrees once you get over the hull wave, but I am not sure... Here is my scenario. A 20 foot skiff with 10 degree deadrise (made for lakes and protected water not a steep vee) at about a 3-1 length to width ratio at the sitting waterline.. Can any of you give me an idea of what pitch this boat might ride at with a outboard attatched to the transom, no whalefins or other hull additives? Thanks.... |
#2
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On 7/6/2014 12:11 PM, KC wrote:
Ok. here is the question... I really can't seem to picture a 20 foot skiff on plane trying to figure out appx what angle of pitch it will travel through the water at.. I can't imagine any more than 3-5 degrees once you get over the hull wave, but I am not sure... Here is my scenario. A 20 foot skiff with 10 degree deadrise (made for lakes and protected water not a steep vee) at about a 3-1 length to width ratio at the sitting waterline.. Can any of you give me an idea of what pitch this boat might ride at with a outboard attatched to the transom, no whalefins or other hull additives? Thanks.... I went on line and searched pictures and such and it looks to me like I am looking at about 4 degrees pitch at plane for this hull. And if that's the case, the numbers look real good for what I am looking to get out of this boat. |
#3
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posted to rec.boats
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On 7/6/2014 11:31 AM, KC wrote:
On 7/6/2014 12:11 PM, KC wrote: Ok. here is the question... I really can't seem to picture a 20 foot skiff on plane trying to figure out appx what angle of pitch it will travel through the water at.. I can't imagine any more than 3-5 degrees once you get over the hull wave, but I am not sure... Here is my scenario. A 20 foot skiff with 10 degree deadrise (made for lakes and protected water not a steep vee) at about a 3-1 length to width ratio at the sitting waterline.. Can any of you give me an idea of what pitch this boat might ride at with a outboard attatched to the transom, no whalefins or other hull additives? Thanks.... I went on line and searched pictures and such and it looks to me like I am looking at about 4 degrees pitch at plane for this hull. And if that's the case, the numbers look real good for what I am looking to get out of this boat. Is pitch something like bow rise? -- "I predict future happiness for Americans if they can prevent the government from wasting the labors of the people under the pretense of taking care of them". Thomas Jefferson |
#4
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On 7/6/2014 3:00 PM, H*a*r*r*o*l*d wrote:
On 7/6/2014 11:31 AM, KC wrote: On 7/6/2014 12:11 PM, KC wrote: Ok. here is the question... I really can't seem to picture a 20 foot skiff on plane trying to figure out appx what angle of pitch it will travel through the water at.. I can't imagine any more than 3-5 degrees once you get over the hull wave, but I am not sure... Here is my scenario. A 20 foot skiff with 10 degree deadrise (made for lakes and protected water not a steep vee) at about a 3-1 length to width ratio at the sitting waterline.. Can any of you give me an idea of what pitch this boat might ride at with a outboard attatched to the transom, no whalefins or other hull additives? Thanks.... I went on line and searched pictures and such and it looks to me like I am looking at about 4 degrees pitch at plane for this hull. And if that's the case, the numbers look real good for what I am looking to get out of this boat. Is pitch something like bow rise? Yeah, that's what I am trying to figure... I have a program that will show me waterlines and some simulations but I need to know about how much bow rise I might have... |
#5
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posted to rec.boats
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On 7/6/2014 7:32 PM, KC wrote:
On 7/6/2014 3:00 PM, H*a*r*r*o*l*d wrote: On 7/6/2014 11:31 AM, KC wrote: On 7/6/2014 12:11 PM, KC wrote: Ok. here is the question... I really can't seem to picture a 20 foot skiff on plane trying to figure out appx what angle of pitch it will travel through the water at.. I can't imagine any more than 3-5 degrees once you get over the hull wave, but I am not sure... Here is my scenario. A 20 foot skiff with 10 degree deadrise (made for lakes and protected water not a steep vee) at about a 3-1 length to width ratio at the sitting waterline.. Can any of you give me an idea of what pitch this boat might ride at with a outboard attatched to the transom, no whalefins or other hull additives? Thanks.... I went on line and searched pictures and such and it looks to me like I am looking at about 4 degrees pitch at plane for this hull. And if that's the case, the numbers look real good for what I am looking to get out of this boat. Is pitch something like bow rise? Yeah, that's what I am trying to figure... I have a program that will show me waterlines and some simulations but I need to know about how much bow rise I might have. build it and find out. -- "I predict future happiness for Americans if they can prevent the government from wasting the labors of the people under the pretense of taking care of them". Thomas Jefferson |
#6
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On 7/6/2014 10:52 PM, H*a*r*r*o*l*d wrote:
On 7/6/2014 7:32 PM, KC wrote: On 7/6/2014 3:00 PM, H*a*r*r*o*l*d wrote: On 7/6/2014 11:31 AM, KC wrote: On 7/6/2014 12:11 PM, KC wrote: Ok. here is the question... I really can't seem to picture a 20 foot skiff on plane trying to figure out appx what angle of pitch it will travel through the water at.. I can't imagine any more than 3-5 degrees once you get over the hull wave, but I am not sure... Here is my scenario. A 20 foot skiff with 10 degree deadrise (made for lakes and protected water not a steep vee) at about a 3-1 length to width ratio at the sitting waterline.. Can any of you give me an idea of what pitch this boat might ride at with a outboard attatched to the transom, no whalefins or other hull additives? Thanks.... I went on line and searched pictures and such and it looks to me like I am looking at about 4 degrees pitch at plane for this hull. And if that's the case, the numbers look real good for what I am looking to get out of this boat. Is pitch something like bow rise? Yeah, that's what I am trying to figure... I have a program that will show me waterlines and some simulations but I need to know about how much bow rise I might have. build it and find out. awesome answer.... |
#7
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posted to rec.boats
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On Sun, 06 Jul 2014 20:32:26 -0400, KC wrote:
Is pitch something like bow rise? Yeah, that's what I am trying to figure... I have a program that will show me waterlines and some simulations but I need to know about how much bow rise I might have... === Most designs like that tend to ride fairly flat at full planning speed but it will depend a lot on speed and loading. |
#8
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posted to rec.boats
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On 7/6/2014 11:20 PM, Wayne.B wrote:
On Sun, 06 Jul 2014 20:32:26 -0400, KC wrote: Is pitch something like bow rise? Yeah, that's what I am trying to figure... I have a program that will show me waterlines and some simulations but I need to know about how much bow rise I might have... === Most designs like that tend to ride fairly flat at full planning speed but it will depend a lot on speed and loading. Thanks... as I looked at google today I am starting to get that idea... I did increase the deadrise to 13 degrees today but gave the bow a bit more lift too and if I go ahead and make a slightly forward mount to keep the prop under the hull, it should stay even flatter... thanks Wayne, I was hoping you would pipe in here, assuming you see a lot of boats in that size range... |
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