hull extension in progress with pics

[oops!]

Re: hull extension in progress with picks

Re: hull extension in progress with picks

i have nooooo idea why my phone didnt ring.........space junk i guess...!!!!


well stupid me........ran into a snag....again....

the first thing i had to do when o got there was to set the frames in place and check for any new glass that may have gotten in the way from the bulkheads being glassed in

there were a few small problematic areas ....but no biggie.....so i added the rest of the frames and got them ready to glass in to place.

all the areas were re acietoned.....i applied a layer of really thick csm ondarvr had given me......i dont think ive seen csm that thick....im guessing 2 oz's....mabe 3....you cant see thru this stuff and it is really thick in your hand.....but did it ever work great !

i applied 2 layers to each frame hull joint....

the csm didnt even drink too much...and it was cooler in the room tonight as the temp is dropping here.

with the frames curing.... i turned my attention to the motor mounts......

the mounts im using are manufactured beams...cut to spec......ive had then drying for a long time....(usless because they were allready dry....but the dryer the better).....the other day i had wrapped them in csm and prepped them to be installed.....

what i forgot is.....that i had never ever test fitted them...ever !...i knew my measurements were correct.....finally the other day i cut them to legnth....the beams needed to fit the transom shape...so i cut them at that angle ....but never test fitted them.......one fit like a charm....and one sat an inch too high,,,,that was beacause of some glass in the hull at the stringer joint.......that ment i had to grind away some of the corners of the mount to get it to fit properly.......

THAT MEANS.....i have to re apply some resin....that means i have to wait to cure....that means it cant go in tonight !....

 

[oops!]

Re: hull extension in progress with picks

Re: hull extension in progress with picks

there is one thing that i wanna show you guys that you are all gonna yell at me for.....but i think the boat is built good enough that i can get away with it.......

in between the hull.....stringers and motor mount cage......(between the strings)......wrapped halfway around the motor mounts......i am putting in rubber !....think about that for a sec....water CAN get to this area...as there are drainage holes from the outer area of the stringers....going thru the motor mount section and finally to the bilge.

the reason for the rubber....is to sound proof any motor noise transmitted theu the mounts to the stringers and deck....the way the boat was before....it was very loud.....no matter what i did to sound proof it....it was loud....so im doing everything i can to stop any noise from getting past the motor cage........

there is a possibility of mold between the mount beam and the rubber....but im convinced that i built everything up with glass enough that water wont get thru the glass to start to rot......

this may be a baaad ideeer.....but im convinced the glassing is enough to protect the wood. i might put a coat of paint in that section just for good measure.

any hoo.........once i realized that i wouldnt be glassing the deck in tonight...i just took a little bit of resin and went around every edge of every board. joint and hole..if i was gonna be delayed......i was gonna make the best of it !

i also decided to take a step back and think about the deck for a bit before i installed it....and im going to need a few modifications to it before it can go down...... i need to make a catch lip for the ski locker....and i needed to add more thickness of ply wood under where the captains chairs will be mounted

so im going to be slowing down on the deck install and put it back by a day or two........

i really dont want to have to rip it up again.....so im going to make sure its right before it goes down permanantly


more tommorow....

cheers
oops

 

[jcsercsa]

Re: hull extension in progress with picks

Re: hull extension in progress with picks

HAy buddie , its allway good to take a step back !!

And what you are thinking on the rubber , is the same thing i was thinking when we talked about putting the foam back in !!!!!!!! I am a little worried about the mold !!I think the paint is a good idea !!!!but if you are going to glue it down I wouldnt worrie about the paint !! in fact i like the glue idea even better !!

Have you heard any more about how long you can stay in there ????? John

 

[sbklf]

Re: hull extension in progress with picks

Re: hull extension in progress with picks

It's nice to reach down from the captains seat and get a cold one but coolers and bait wells are better towards the back of the boat. Your beer and bait are going to get beat to death up there.

 

[douglee25]

Re: hull extension in progress with picks

Re: hull extension in progress with picks

I would strongly advise against using that rubber for the motor mounts. If you look at all boats, the motor mounts are solid. There is a good reason for this. The driveshaft in an I/O configuration and the propshaft in a Vdrive configuration all need to be perfectly centered and isolated from movement. In your case for the I/O configuration, any movement on the driveshaft will put unnecessary wear on the gimball bearing, driveshaft surfaces, and Ujoints. You will end up with more vibration from a misaligned driveshaft using that rubber during your motor mount construction. I would advise against it.

Doug

 

[oops!]

Re: hull extension in progress with picks

Re: hull extension in progress with picks

I would strongly advise against using that rubber for the motor mounts. If you look at all boats, the motor mounts are solid. There is a good reason for this. The driveshaft in an I/O configuration and the propshaft in a Vdrive configuration all need to be perfectly centered and isolated from movement. In your case for the I/O configuration, any movement on the driveshaft will put unnecessary wear on the gimball bearing, driveshaft surfaces, and Ujoints. You will end up with more vibration from a misaligned driveshaft using that rubber during your motor mount construction. I would advise against it.

Doug

thank you douglee, the mounts are just isolating the wood from the rubber, the mounts will be totally solid....they'll be glassed over and into posisition. the glass that will go on there is three wraps if 1708. so.....the mounts......they arent going any where.....the rubber is just a vibration damper

 

[stevenw00]

Re: hull extension in progress with picks

Re: hull extension in progress with picks

That might not be a bad idea, but I bet all of your vibration is going to be transmitted right through the fiberglass, right around the rubber. I doubt it has any effect on noise at all, but as long as your mount is glassed in solid, I guess I can't hurt to try that.

 

[zach103]

Re: hull extension in progress with picks

Re: hull extension in progress with picks

hahaa bubba you put a govener on that. never seen that on a boat. at least not to my knowledge

 

[oops!]

Re: hull extension in progress with picks

Re: hull extension in progress with picks

any one else have any objections that i havent thought of in reguards to the rubber vibration/sound dampners befor i glass them into place tonight?

 

[douglee25]

Re: hull extension in progress with picks

Re: hull extension in progress with picks

any one else have any objections that i havent thought of in reguards to the rubber vibration/sound dampners befor i glass them into place tonight?

Can you do a simply paint drawing of exactly what this is supposed to look like? The layering of the stringer, glass, rubber, etc.

I'm confused.

Doug

 

[oops!]

Re: hull extension in progress with picks

Re: hull extension in progress with picks

gee doug....i wish i could......but the truth is....i can't draw a darn thing on this puter....dont know how !!!!

but here is how it goes.......

the motor mounts are beams of wood encased in fiberglass....

the beams fit perfectly in between the stringers and hull......with a foward bulkhead and the transom at the back.....no movement...they fit solidly.

a very thin rubber matt....(kinda like dyna matt) is layed on the bottom between the hull/stringers...and the motor mount beam.

over top of every thing...i will be adding 3 layers of really thick strong fiberglass.......the mount will actually be sitting on the glass....the beam is just to lag to......

sorry doug...im really tired...i hope this explanation helps you..

thanks
oops

 

[douglee25]

Re: hull extension in progress with picks

Re: hull extension in progress with picks

gee doug....i wish i could......but the truth is....i can't draw a darn thing on this puter....dont know how !!!!

but here is how it goes.......

the motor mounts are beams of wood encased in fiberglass....

the beams fit perfectly in between the stringers and hull......with a foward bulkhead and the transom at the back.....no movement...they fit solidly.

a very thin rubber matt....(kinda like dyna matt) is layed on the bottom between the hull/stringers...and the motor mount beam.

over top of every thing...i will be adding 3 layers of really thick strong fiberglass.......the mount will actually be sitting on the glass....the beam is just to lag to......

sorry doug...im really tired...i hope this explanation helps you..

thanks
oops

I think I understand you now and I still don't know if I'd recommend it. It sounds as though it's another source of movement which could eventually cause the fiberglass to fatigue and crack. Think about it this way, if the rubber is encapsulated in wood/glass, what is the point of the rubber anyway? The surrounding glass just ties the motor mount cage to the hull. The rubber will do no good unless it has the ability to move around. The rubber can't flex because the glass basically makes it one structure.

Doug

 

[oops!]

Re: hull extension in progress with picks

Re: hull extension in progress with picks

i understand your point....and its a good one.....

the glass/wood on glass/wood....is an exellent conductor of sound.....the rubber would serve to cut that down some....i would hope....

its not a done deal yet.....im just hoping i can cut down the noise any way i can....i dont want to hear the motor at all.... !

 

[fire7882]

Re: hull extension in progress with picks

Re: hull extension in progress with picks

I think I understand you now and I still don't know if I'd recommend it. It sounds as though it's another source of movement which could eventually cause the fiberglass to fatigue and crack. Think about it this way, if the rubber is encapsulated in wood/glass, what is the point of the rubber anyway? The surrounding glass just ties the motor mount cage to the hull. The rubber will do no good unless it has the ability to move around. The rubber can't flex because the glass basically makes it one structure.

Doug

I agree. I think the risk is greater than the slight chance of any noticable improvements. A good running engine shouldn't cause that much vibration anyway plus now you will be 5 feet further away from the engne than you were before.

 

[oops!]

Re: hull extension in progress with picks

Re: hull extension in progress with picks

I agree. I think the risk is greater than the slight chance of any noticable improvements. A good running engine shouldn't cause that much vibration anyway plus now you will be 5 feet further away from the engne than you were before.

its not as much as the vibration....but the sound vibration....traveling thru the mounts to the mount block.....and thru the stringers ....the rubbers job is to stop or cut it down....


bubba....the wood blocks are a hard wood laminated beam....the actual mounts that come from the motor that sit on the blocks are a liquid mount....(a mercruiser mount?)....i havent seen them in a year as theuy are with the motor in storage.

 

[ne7800]

Re: hull extension in progress with picks

Re: hull extension in progress with picks

i dont want to hear the motor at all.... !

your putting in a 383 stroker and you don't want to here it
if i had a motor like that you would here me from across the lake

 

[oops!]

Re: hull extension in progress with picks

Re: hull extension in progress with picks

some of my best boating is with my girl at night...just ideling at dead slow....talking.....i want it as quiet as possible....every little bit counts.

i will even be sound proofing the pvc tubes that will have the cables running from cockpit aft

 

[oops!]

Re: hull extension in progress with picks

Re: hull extension in progress with picks

heh heh heh....if i can find a trolling motor that will push that thing,,,ill get it...just as an emergency spare ...i just hate swimming in pulling the boat via a rope over my shoulder......i used to keep swim fins and a wet suit in the boat for just that reason

 

[redfury]

Re: hull extension in progress with picks

Re: hull extension in progress with picks

How about you get one of those electric trolling motors that mount on the outdrive? You can get 36v motors with 102lbs of thrust...should be enough to push that boat...

Or maybe find a small I/O set up and mount it next to the big one

 

[ajhoude77]

Re: hull extension in progress with picks

Re: hull extension in progress with picks

Just to chime in...

That rubber won't do anything to dampen the sound. The sound waves are travelling energy and will take the path of least resistance, just like electricity. Sound travels more effectively through solids, so the vibrations are just going to bypass the rubber and travel from the mounts into the stringers through the glass. It may make it louder at that, since you won't be dissipating as much of the vibration through the hull where the foot of the mount sits- most of it will be going into the stringers. The stringers will vibrate the deck, and with empty space underneath you'd basically turn your boat into a big violin. To really cut down noise, you'd probably have to fill the empty space with foam or something.

Just get a trolling motor or a really long gondola stick...