1973 SRV 220 OV Resto

[mrdjflores]

Re: 1973 SRV 220 OV Resto

well...more cutting out today...
even uncovered part of the belly tank..

also uncovered a major manufacturer defect...

that large file of glass is supposed to be wrapped over that wood, and then filled with foam. well, looks like the glass fell off the wood after the desck was on, and then filled with foam...yep, wet nasty foam right up against the wood...

 

[boatnut74]

Re: 1973 SRV 220 OV Resto

Looks like you are in for a full on resto now.

 

[mrdjflores]

Re: 1973 SRV 220 OV Resto

yeah, but since i had most of the interior ripped out to rebuild and update, i guess throwing the deck and stringers in there isn't that more more work...just more $$

 

[mrdjflores]

Re: 1973 SRV 220 OV Resto

slight halt on the progress...
burnt up my oscillating tool..from HF ofcourse...
hopefully i can find the receipt...only about a month old

 

[mrdjflores]

Re: 1973 SRV 220 OV Resto

figured i would spend some time working on my transom layout.
one problem i am having is that i cannot pre-assembly/laminate the transom before placing it in the boat...the cap is in the way, and removing the cap is not an option..

here is one thought...3 layers of 1/2" ply with glass in between each layer..each layer is also divided in 3 sections..

each seam from each layer is staggered 6" from the seam on the adjacent layer...depending on the order of how the layers are placed.

i have a stress analysis running on a few different scenarios of different layouts of which layers are placed in which order

thoughts??

 

[mrdjflores]

Re: 1973 SRV 220 OV Resto

was also thinking about cutting the joints on 2 of the layers at opposing angles...so when all 3 layers are stacked, the individual panel joints will form a sort of crossing pattern...

 

[mrdjflores]

Re: 1973 SRV 220 OV Resto

keep in mind, this boat originally had a 'bump' transom...
1 layer of 3/4 was full width of the transom
1 layer of 3/4 was only about 32" wide, centered on the transom

 

[mrdjflores]

Re: 1973 SRV 220 OV Resto

i think i have decided to do the angled cut patterns...using 3 layers of 1/2" ply...with either csm of 1708 between each layer, which ever would be better....
i am also assuming that the first 1/2" layer gets bonded to the inside of the transom with PB or PL??

thoughts?

 

[mrdjflores]

Re: 1973 SRV 220 OV Resto

more decking and foam removed....foam has been pretty much dry except at the very bottom and anywhere it comes in contact with wood...all the wood has still been mush..

 

[GT1000000]

Re: 1973 SRV 220 OV Resto

Hello mrdjflores,

I have been a long time lurker and admirer of your fine work, both on the boat and your upholstery lessons...thank you for sharing...

I have broken my silence to add my 2? worth about the transom...

I understand your dilemma since a fellow Iboater, Pmmcraney just went through this with his Chris Craft...having to work under and around the cap...

The two designs you have posted look like they would work just fine, but I would like to throw out another idea...

Please, forgive my Paint drawings, as they are not the most advanced, but here goes...

My rational is that with a configuration like this, you will not have all your joints going in the same direction and the two vertical pieces could have there joints offset from each other to your liking...

As far as 'gluing' everything together, if speed of installation and time for positioning are what you are after, the PL would be the slower setting choice,
although the general consensus I have come across is that PB is a much better choice for the laminations that go directly to the inner and outer hull skins...

My thought would be to adhere the first layer to the outer hull skin with PB, then finish the subsequent layups with your choice of PL or a waterproof glue like Titebond III...

Best Regards,
GT1M

 

[mrdjflores]

Re: 1973 SRV 220 OV Resto

"My thought would be to adhere the first layer to the outer hull skin with PB, then finish the subsequent layups with your choice of PL or a waterproof glue like Titebond III..."

would glueing each subsequent layer of plywood to each other be the preferred method, or resin and glass between each layer?

 

[mrdjflores]

Re: 1973 SRV 220 OV Resto

Just another observation i made..

i think my gas tank has been replaced before...3 things lead me to believe this true:

1) the tank isn't centered in the belly...you can see from the previous picture that is is offset to one side, it is flush to the stringer on the port side, but there is a gap on the starboard side that is filled in with foam.

2) the decking on top of the tank is new(er) than the rest of the decking...and had a horrible resin/glass job on it

3) the foam on top of the tank is a bit different that the rest of the hull foam, and looks to be poured in blobs instead of a full cavity pour.

my plan is to fully center the belly tank and run some wood supports across the top to take some of the load of the decking and people walking on it.

anyone see any issues with this idea?

 

[GT1000000]

Re: 1973 SRV 220 OV Resto

Just another observation i made..

i think my gas tank has been replaced before...3 things lead me to believe this true:

1) the tank isn't centered in the belly...you can see from the previous picture that is is offset to one side, it is flush to the stringer on the port side, but there is a gap on the starboard side that is filled in with foam.

2) the decking on top of the tank is new(er) than the rest of the decking...and had a horrible resin/glass job on it

3) the foam on top of the tank is a bit different that the rest of the hull foam, and looks to be poured in blobs instead of a full cavity pour.

my plan is to fully center the belly tank and run some wood supports across the top to take some of the load of the decking and people walking on it.

anyone see any issues with this idea?

"My thought would be to adhere the first layer to the outer hull skin with PB, then finish the subsequent layups with your choice of PL or a waterproof glue like Titebond III..."

would glueing each subsequent layer of plywood to each other be the preferred method, or resin and glass between each layer?

Short lunch today...

quickie responses...

Tank re-position idea sounds good to me...

Resin and cloth are preferred, if you were working horizontally, but waterproof glue easier to work with in the confined and vertical spaces you will be dealing with...

Again, just my 2?

 

[mrdjflores]

Re: 1973 SRV 220 OV Resto

my thoughts on the lay up of my transom (see above posts why i'm using 3 layers of 1/2" vs 2 layers of 3/4")

your thoughts??

 

[ben2go]

Re: 1973 SRV 220 OV Resto

my thoughts on the lay up of my transom (see above posts why i'm using 3 layers of 1/2" vs 2 layers of 3/4")

your thoughts??

That's the way I will do mine.

 

[mrdjflores]

Re: 1973 SRV 220 OV Resto

slight pause again....threw out my back somehow today

 

[GT1000000]

Re: 1973 SRV 220 OV Resto

Hope your back gets better soon, I know all too well the feeling...


I really like your lay-up schedule and if you can carry it out on the vertical, it will be Heck-bent for solid...

Just make sure you...A- have everything ready to go for each layer of CSM and Ply...preferably have a helper, pre-prepare your resin batches { don't make one giant batch because it will kick off faster than you can shake a stick at it, due to the heat generated by the volume} pour out several small batches, say a quart at a time, with the MEK-P ready but separate, to be added as needed, have all your CSM pre-cut and marked as to there respective locations...and...2- Most of all do a couple of rehearsals to make sure you have everything in "synch"...remember that as you lay up the laminations, you need to clamp them solid before they start to kick off...for speed, you could use Stainless Steel drywall screws and just leave them sealed in place...Remember, that you only have about 15-20 minutes of working time with the resin, so you have to make sure you have everything worked out beforehand to prevent a catastrophe...

 

[mrdjflores]

Re: 1973 SRV 220 OV Resto

thanks for giving me a good game plan...i've been considering using poly resin after talking to some others on here.
do you see any issues with using poly?? and PB made with poly??

 

[GT1000000]

Re: 1973 SRV 220 OV Resto

thanks for giving me a good game plan...i've been considering using poly resin after talking to some others on here.
do you see any issues with using poly?? and PB made with poly??

You are very welcome...

I see no issues...as a matter of clarification...the generic term poly is usually associated with polyurethane resin, which is basically what most boat manufacturers use to fabricate their boats...

There are various different types of 'poly' used in boat building, but for our purposes, lay-up resin or laminating resin, is usually more than sufficient for our restorations...

For a much more professional education on resins...read through this link in the HOW TO's... http://forums.iboats.com/showthread.php?t=286013 ...

Tons and tons of good information, but it can get quite overwhelming...

One thing I thought of, since you are planning to use resin/CSM between the ply layers...

The CSM will become very difficult to handle when it is wet out with the resin...which brings me to my suggestion...

Once you get a game plan set on how you are going to do your lay-up...

Say you have the first plywood sections of the transom already adhered with PB to the outer skin of the hull and are getting ready to apply the next layer of plywood to that...

It would be easiest if you wet the installed plywood with resin...then wet the next three sections of the transom lamination with resin and apply the CSM to each of them while they are in the horizontal position...then layer them to the previous section and clamp in place...Much easier than trying to work with a wet floppy piece of CSM in the vertical...I hope this makes sense...:facepalm:

 

[mrdjflores]

Re: 1973 SRV 220 OV Resto

thats good thinking on the lay up..
i've read those threads and have talk too oops! in quite detail, along with a few others...but soon as i am convinced one way, someone comes along with compelling reasons to do it another way...
a thousand ways to skin a cat as they say