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08-19-2017, 05:58 PM #46
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FMP, Noah Burns liked this post
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08-19-2017, 06:09 PM #47
Supply !! Grids are made to suit each individual hull ! they are well thought out before hand and the finished height is the base for the floor to be fixed to !!
PLUS its possible to fix an under floor fuel to the grid ,and the grid can be filler with Buoyancy floatation foam that also helps with making the hull quieter !
In production they are a big time saver !! as the are premade and fitted and fixed in position permanently before the hull is released from the mould and lifted out so holds the hull in shape perfectly !! Yes I have lots photos but will have to find again as I sent quite a few to another person !
For a 6 METER boat its possible to make the hull and deck in just 1 day and maybe 2 days to assemble and fit all the screw on fittings so a fully finished boat can be ready for the water in 4 days is not impossible !!Last edited by tunnels; 08-19-2017 at 06:14 PM.
Messing round with boats is fun !! the learning never stops ,even after more than 30 years there's always something new happening somewhere ! BUT somethings never change and some problems never go away and just keep reoccurring !!so moved into Composite Forensics , Now that something completely new !!
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08-19-2017, 06:15 PM #48Screaming And Flying!
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83 V-King, 96 Mariner, 200 hp ff block 2.5 w/a 28p choppa
We gotta clean this liberal mess up, VOTE TRUMP TO MAGA!
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08-19-2017, 06:15 PM #49Screaming And Flying!
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Tunnels, can a hull be too stiff?
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08-19-2017, 07:59 PM #50
mmmmm ! that's a good question !personally a stiff hull is like riding in a car with no suspension and solid rubber tyres !!you feel every wave and you have a hard riding boat ! Yes design has a lot to do with how well it rides also !Also if its hard riding stress cracks and the actual constuction suffers as well from the vibration and crashing and pounding !!things break !!
ITS NOT ONLY HARD ON THE BOAT BUT HARD ON THE PEOPLE AS WELL!! SORE KNEES AND ANKLES AND HIP JOINTS AND SORE BACKS AND NECKS ARE ALL PART OF IT !! PLUS pink pee from blood in you Uren now that's getting serious !!
Now the same design boat with flexibility built into the hull it becomes a softer ride at the same speed and the flexing becomes like a shock absorber ! All this can have a lot to do with the glass lay up and what it made of as well and if it has a grid that to has a big influence on the flexibility and how much parts can move up and down between the stringers .
By the look of that grid in the picture its from a hull that has steps so immediately says it was a fast boat ! its a pretty heavy looking structure id say , but grids come in many shapes and sizes and can save hours of work !!
Can a hull be to stiff ?? id give that a definite positive YES !!Last edited by tunnels; 08-22-2017 at 05:01 PM.
Messing round with boats is fun !! the learning never stops ,even after more than 30 years there's always something new happening somewhere ! BUT somethings never change and some problems never go away and just keep reoccurring !!so moved into Composite Forensics , Now that something completely new !!
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08-19-2017, 08:26 PM #51
Disagree totally on that last statement...hull should be as rigid as possible to let the bottom design be able to do its job. The same has been going on for years in the automotive design industry..the structure needs to be as stiff as possible so the suspension is able to do what it was designed to do.
I CAN ALWAYS MAKE ANOTHER DOLLAR, BUT I CANNOT MAKE ANOTHER DAY
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Noah Burns liked this post
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08-19-2017, 08:41 PM #52
but boat dont have any suspension and even the design is not suitable sometimes !! And as for stiff structures in the automotive industry truck have chassis that flex and twist !!
FLEX AND TWIST HAVE HUGE ADVANTAGES OVER SOLID UNMOVABLE STRUCTURES EVEN IN THE BUILDING INDUSTRY !Last edited by tunnels; 08-19-2017 at 08:46 PM.
Messing round with boats is fun !! the learning never stops ,even after more than 30 years there's always something new happening somewhere ! BUT somethings never change and some problems never go away and just keep reoccurring !!so moved into Composite Forensics , Now that something completely new !!
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08-19-2017, 09:05 PM #53Screaming And Flying!
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Might have to agree with as stiff as can be provided layup has the strength to resist structure from cracking it at all points of bonding. So good core and layup with super frame up and a bottom design that provides for the intended use. Deadrise , pad or v or round, strakes, beam etc but no twist in turn ridding chop or rollers. And put together not to pop if stuffed. I think I just described a Formula
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08-19-2017, 10:56 PM #545000 RPM
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08-19-2017, 11:02 PM #555000 RPM
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08-19-2017, 11:07 PM #565000 RPM
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08-20-2017, 12:19 AM #57
you should try out on the Ocean and jumping ocean rollers and hitting the water flat and the whole boat shudders end to end or a harbour entrance with wind against the tide flow and pounding you guts out !!
Riding big waves in a inflatable surfboat that's half filled with water from picking up a drowning swimmer and hitting the sand at 40mph !!, Ridged hulls only stand that happening once normally and they completely burst apart ! No flex !!
Behind a factory I worked theres are a stack of 6 surf boats that shattered and broke because the were TO RIDGED and built TO THICK LAMINATE with woven roving !!, HAD NO GIVE!!, NO FLEX !!AND NO TWIST !!,Last edited by tunnels; 08-20-2017 at 12:24 AM.
Messing round with boats is fun !! the learning never stops ,even after more than 30 years there's always something new happening somewhere ! BUT somethings never change and some problems never go away and just keep reoccurring !!so moved into Composite Forensics , Now that something completely new !!
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08-20-2017, 06:26 AM #58
S
So your point being to that big black THING is ???? does it have anything to do with stringers ?? or is it just another diversion ??not interesting !! could be a ornament for the front garden maybe depend if its laying down or standing up !! I know its a missile rocket thing for mr Kim in North Korea !!Last edited by tunnels; 08-22-2017 at 04:55 PM.
Messing round with boats is fun !! the learning never stops ,even after more than 30 years there's always something new happening somewhere ! BUT somethings never change and some problems never go away and just keep reoccurring !!so moved into Composite Forensics , Now that something completely new !!
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08-20-2017, 06:38 AM #59
Just purely as a matter of interest to all what is you back ground ? have you worked within the composite industry and done practical work such as laminating, worked with chopper guns and what about gel coating and not forgetting the understanding of very basic composite engineering and simple boat design and construction ??
Oh and a trip back in time what race of people made the fastest safest simplest sail boats on the sea ??Last edited by tunnels; 08-20-2017 at 06:42 AM.
Messing round with boats is fun !! the learning never stops ,even after more than 30 years there's always something new happening somewhere ! BUT somethings never change and some problems never go away and just keep reoccurring !!so moved into Composite Forensics , Now that something completely new !!
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08-20-2017, 06:59 AM #60Screaming And Flying!
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Is a scale or unit of measurement used in describing terms of flex or resonance. "Give" per measured length at different hull locations, front sides , bow transition, running surface transition areas with unit of applied force?
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