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Peeled the Delta..
http://hpbc.ca/viewtopic.php?f=20&t=4195		 Page 2 of 6
Author:  Tomcat [ July 1st, 2019, 4:54 pm ]
Post subject:  Re: Peeled the Delta..
... doubt not donut.
Author:  mattmak [ July 1st, 2019, 5:21 pm ]
Post subject:  Re: Peeled the Delta..
That's a good typo, haha..

I typically clean with a solvent before applying epoxy... all the surfaces are always sanded before the solvent cleaning. So much sanding..!

I just tried 99.9% Isopropyl Alcohol and it also dissolves the primer but not nearly as quick or completely as the acetone.

With some online research, I'm seeing some surface prep solvent/cleaner for acrylic automotive primer that I could try..

Anyone know what will happen if I apply epoxy primer over this acrylic primer? And do you have suggestions for solvent wiping down the acrylic before epoxy filler, and before epoxy primer?
Author:  mattmak [ July 1st, 2019, 5:58 pm ]
Post subject:  Re: Peeled the Delta..
Some balsa core on in the rear, on the sides up above the floor:
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It is rotten towards the back, but dry.
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Acetone melting the old primer. You can see that the dissolved primer was brought in to the the cavities by the acetone, and is now dry. Not good. :
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Author:  mattmak [ July 1st, 2019, 6:17 pm ]
Post subject:  Re: Peeled the Delta..
Vid with grinding of some gel coat cavities. Really shows how important the methods for gel and first fibers in to the mold are for quality..:

https://www.youtube.com/watch?v=HEXe4goEzBA
Author:  mattmak [ July 1st, 2019, 6:33 pm ]
Post subject:  Re: Peeled the Delta..
Also weighed the hull and motor today:

Bare hull with home made setback/jackplate, some motor bolts, helm with cable and steering wheel, no top paint, not sure how much of the hoist straps are in this: 153kg

Motor without cowl, full Pro50 bracket and trim, power cables: 86kg

Leaving those numbers in metric to mess with the Bucknells. :twisted:
Author:  Tomcat [ July 1st, 2019, 7:06 pm ]
Post subject:  Re: Peeled the Delta..
Epoxy will bond to any substrate but best recommendation for materials and prep solvents should come from your glass/topcoat supplier.
Author:  idvette [ July 2nd, 2019, 7:17 am ]
Post subject:  Re: Peeled the Delta..
mattmak wrote:
Leaving those numbers in metric to mess with the Bucknells. :twisted:


It's funny how mixed up we are over measurements. I work on American built vehicles with metric fasteners. On safety inspections, I measure brake specs in metric, but tire specs are imperial. Tire sidewall info is metric. Everybody wants to try and figure out what l/100km is when all they understand is mpg. :?
Author:  hec2buck [ July 2nd, 2019, 10:22 am ]
Post subject:  Re: Peeled the Delta..
The motor weighs 189.2 lbs. w/o cowl? Wow, ours weighs 167 lbs. with cowl. However, that does not include power trim. That adds another 16 lbs. That puts us at 183lbs. w/trim. Steering bars add another 4-5 lbs. Your boat weighs 336 lbs., so total weight w/o driver is about 526 lbs. Add 2 gallons of fuel at 14 lbs. and your total is 540 lbs. We are at 546 lbs. w/o top boat cowl. Cowl weighs 16 lbs. so our total is 562 lbs. I weigh 225lbs. You are totally in the ballpark with all of us. However, Jessie is considerably lighter than the rest of us with boat weight & body weight.
Everything is in pounds to mess with Matt. Lol
Author:  mattmak [ July 2nd, 2019, 11:39 am ]
Post subject:  Re: Peeled the Delta..
Thom, after weighing the motor and hull at home, I did some estimating total weight and it came to approx 643lbs ready to race with the safety gear and helmet in the boat. I included all that because that's what I had on the crane at PTBO in this past fall. I'm trying to find my records from PTBO2018, but I think I remember the crane scale reading 650lbs.
Author:  mattmak [ July 2nd, 2019, 12:01 pm ]
Post subject:  Re: Peeled the Delta..
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