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MaxCatV1-L Scratch Build

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MaxCatV1-L Scratch Build

Old 08-24-2008, 06:53 PM
  #251  
KD0EM
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Default RE: MaxCatV1-L Scratch Build


ORIGINAL: grant118

I vote for a new thread. I love reading these, it keeps me inspired.

chris
I 2nd it.
Old 08-24-2008, 06:56 PM
  #252  
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Default RE: MaxCatV1-L Scratch Build

Hello all, here are a few pictures of the hull after getting it all covered with 1 1/2 oz fiberglass, also I raped 1” strips of glass on the out side corners on the sponsons, the red lines show where. I just found the one picture that my wife took out an upstairs window, did not know she was watching me, lol
Harold
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Old 08-25-2008, 12:11 AM
  #253  
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Default RE: MaxCatV1-L Scratch Build

I was away for 2 weeks and just caught up on this thread. The boat looks great Harold.

Marcel, for cutting strakes on the table saw I would set the blade to the angle you wish and set your rip fence so it will just cut the angle on the edge of a wider board, then set the blade back to vertical and set your rip fence so when you run the board thru it will cut the strakes to the size you want. If you try to run little strips like the strakes thru the saw to cut the angles it would be very hard to get them right I believe.

Doug
Old 08-25-2008, 10:56 AM
  #254  
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Default RE: MaxCatV1-L Scratch Build

Hi Doug, thank you for the nice comment, and welcome back.
Harold
Old 08-25-2008, 10:59 AM
  #255  
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Default RE: MaxCatV1-L Scratch Build

Hello, I am just getting started no making the formers for the canopy and hatch cover. The pictures show how I am getting the bottom cut line of the canopy formers to match the deck line.
Harold

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Old 08-25-2008, 07:54 PM
  #256  
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Default RE: MaxCatV1-L Scratch Build

clever I like it
Old 08-27-2008, 07:41 AM
  #257  
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Default RE: MaxCatV1-L Scratch Build

Hello, I am now sketching by hand al of the long formers three of them, one bottom sheet, and 9 ribs, after getting the patterns sketched I will cut all the parts and glue them to the deck, I will then cut foam blocks and slide them in the openings and then shape it all down to the wood formers. I am having trouble getting the right shape for the ribs; I will get them right some time I hope.
Harold
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Old 08-27-2008, 08:40 AM
  #258  
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Default RE: MaxCatV1-L Scratch Build

Hi Harold, you only need 1 long former, maybe some stringers to keep all the ribs at a 90 degrees angle.
But this is the way to do it. Told you this was the hard part
Old 08-27-2008, 11:54 PM
  #259  
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Default RE: MaxCatV1-L Scratch Build

Hello, I got all the ribs and former cut for the canopy and dry fit it, it all looked ok to me so I CA glued it to the deck, I got a bit of sanding to do on it, then cut and put in the foam blocks and shape and sand the canopy.
Harold

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Old 08-28-2008, 09:28 PM
  #260  
grant118
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Default RE: MaxCatV1-L Scratch Build

Thanks for all the documentation on this build. I am learning a lot.
chris
Old 08-29-2008, 03:57 PM
  #261  
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Default RE: MaxCatV1-L Scratch Build

I have to agree with that last post, this has been very educational, and the boat looks fantastic Harold.
And a big thanks to Max for designing the boat and making the plans available to begin with - it's nice to see someone just giving to this hobby by making such nice plans available, as free "quality" cat plans look to be as rare as good old hen's teeth.
Harold, your canopy lines look really good, is there any chance of you posting the line drawings?

Now the hard part ..... to get the wife to agree to me building one of these in our house!
Old 08-30-2008, 07:59 AM
  #262  
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Default RE: MaxCatV1-L Scratch Build

Hello kiwibob, check out post#: 221, this is a presentation of the canopy that I used to make the canopy ribs and former, I printed a copy of the picture then I free handed a sketch drawing of it on drawing paper, the ribs I just sketched from center to one outside tip then folded the paper in ½ and traced the other 1/2. Hope this will help you.
Harold

Old 08-30-2008, 02:50 PM
  #263  
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Default RE: MaxCatV1-L Scratch Build

Hello every one, I have got all the foam cut and in the form for the canopy, I use 3m spray glue to hold the foam in the form, I will now start to sand it to shape, then I will paint it with latex paint to harden it so I can lay-up fiber glass on it for the canopy plug.
Harold

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Old 08-30-2008, 06:32 PM
  #264  
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Default RE: MaxCatV1-L Scratch Build

OK, got all the floral foam glued in shaped and sanded. Here is ware I could use some feed back, I am thinking of putting on a few coats of regular latex house paint on the canopy to harden it up so I can fiber glass it and bondo it to get that super fine finish. Do you think the latex paint will work here?
Harold
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Old 08-30-2008, 06:53 PM
  #265  
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Default RE: MaxCatV1-L Scratch Build

Very beautiful build. What is more interesting is Dow Chemical foam glued using 3M adhesive........is it coorperation or?

Latex paints will work fine before topping off with glass. Keep up the good work mate.
Old 08-30-2008, 09:47 PM
  #266  
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Default RE: MaxCatV1-L Scratch Build


ORIGINAL: RCGasBoat

Very beautiful build. What is more interesting is Dow Chemical foam glued using 3M adhesive........is it coorperation or?

Latex paints will work fine before topping off with glass. Keep up the good work mate.
Hello RCGasBoat, Thank you for the nice comment. I was not able to use the 3M adhesive, it had a Chemical reaction with the foam, the 3M works good with the wet floral foam, put not the dry floral foam, so I had to cut the foam blocks to fit tight.
Harold

Old 08-30-2008, 10:44 PM
  #267  
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Default RE: MaxCatV1-L Scratch Build

Just on that chemical reaction, if you are gluing foams, always try to use a low solvent adhesive, this will reduce a lot of issues with foams "melting" due to the solvents.
Another trick that applies to a lot of liquid adhesives is to cover the less vulnerable surface first, make contact with the second surface (put them together), then pull them apart and let the adhesive on each surface breath for a few moments (5 min if possible) before sticking back together, as it can reduce a lot of issues with foams "melting" due to the solvents.
This will depend on you adhesive cure time etc of course.
Our contractors used this technique at a firm i used to work for who did large scale polystyrene/plaster moldings and profiles on commercial buildings with great success (even 'low solvent' can dissolve your work if used excessively without proper care).
As always when ever using foams that can be effected by solvents, do a test away from your work first just to be sure that what ever you are using is compatible if you are in any way unsure.

PS. Harold, going by your photo, I'm hoping your not planing on letting this boat go slow enough to have birds landing on it!
Old 08-31-2008, 02:47 AM
  #268  
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Default RE: MaxCatV1-L Scratch Build

Hi Harold,

You could probably have glued the foam with epoxy, since epoxy is very mild to foam
The latex might work, but why do that? Just put a thick coat of epoxy over the foam [no polyester!] then one layer of thin glass.
On this layer of glass you can use bondo or whatever filler you want, i use a epoxy based filler.
Sand it to the desired shape [very snooth] and also make the edges to the deck with a fillet.
Your hatch is coming along nicely!

Marcel
Old 08-31-2008, 03:39 AM
  #269  
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Default RE: MaxCatV1-L Scratch Build

Looking good mate,i agree coat it with epoxy mate,for gluing foam i use water prrof wood glue or pva,it works very well.also to seal foam you can use good old brown paper and the same glue i made an actual plug this way its all paper and glue ,sands well and hard as nails once set.Heresa pic of the orriginal covered in tape and the paper plug or mould,havent decided yet .
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Old 08-31-2008, 08:35 AM
  #270  
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Default RE: MaxCatV1-L Scratch Build

Hello, I just got done putting on a thick coat of epoxy over the foam and one layer of 1 ½ oz fiber glass, Thank you Marcel for the tip. And also thank you Mart for the good tips.
Harold

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Old 08-31-2008, 09:24 AM
  #271  
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Default RE: MaxCatV1-L Scratch Build

looks like you got it covered mate sorry had to say that hehe,looks good mate.Cant wait to see how your mould comes out once the plugs done.Lots of work i know as ive just done something similar myself,checkout my thread .If you need anty tips ask away,this was my first try at doing it and it came out as planned which was nice.
Mart
[link]http://www.rcuniverse.com/forum/m_7873094/tm.htm[/link]
Old 08-31-2008, 04:59 PM
  #272  
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Default RE: MaxCatV1-L Scratch Build

Hello, Two more pictures after a coat of epoxy resin thickened with microballoons.
Harold
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Old 08-31-2008, 06:49 PM
  #273  
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Default RE: MaxCatV1-L Scratch Build

I ended up using bondo directly over the shaped florist foam when building my plug. Primered, sanded, primered, sanded, primered, sanded...you get the idea. Eventually the surface was perfectly smooth and ready for final paint. Maybe this helps??
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Old 09-01-2008, 06:43 PM
  #274  
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Default RE: MaxCatV1-L Scratch Build

Did you guys watch how I mad my cowl?
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Old 09-01-2008, 07:23 PM
  #275  
grant118
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Default RE: MaxCatV1-L Scratch Build

balsa covered white foam? What thickness did you use and did you glass it afterward?
chris

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