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Thread: Build Log first sailboat build - footy Razor

  1. #1

    Default Build Log first sailboat build - footy Razor

    Hello,

    I thought I might make a build log for the first boat I've ever built. I decided to do a footy Razor, to keep build costs down and to hopefully see it through, since I'm a novice at boats.

    So far I have purchased the following:
    2- 1/32"x6"x36" sheets of balsa
    1- 1/8"x4"x36" sheet of balsa
    2- 3/32"x3/32"x36" square balsa sticks
    CA glue
    Elmers Carpenters Glue

    I printed out the Razor plans from http://footy.rcsailing.net/plans.php on 8.5"x14" paper.

    I cut out the patterns and taped them together to get a feel for how it would go with wood. I then printed out and cut another set for applying to the Balsa. I modified the bow angle a little and the bottoms to match the change. I used stick glue for paper to adhere the patterns to the Balsa. I cut the patterns out of the Balsa using an Exacto knife. I tried the scissors, but it's easier for me, with the Exacto. I have done other types of wood models and I'm familliar with an Exacto knife.

    Below are a couple of photos of the patterns. This will probably be a long build, just because of funds. After I assemble the hull, keel and rudder, I will have to wait a couple of months to buy the servos, radio, etc.... So the thread might be gone for a while....... But I will try to see it all through and keep updating as I can.

    Added - I just finished gluing it together. Harder than I expected. I had to use CA & I'm not familliar with it, but it's glued now. I used Wood glue on the inside seams for now...... Here's a couple of pictures.

    Justin
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    Last edited by jusval; 09-19-2008 at 02:31 PM.

  2. #2

    Default Re: Build Log first sailboat build - footy Razor

    Well I did a little more to the build today. Did some fine sanding on the outer hull, primed it to see the rough spots and used filler to get it smoother. Also cut out the deck. I cut it larger than the pattern because I'm going to put a slight bow in it.

    Just one pic for today....

    I will start building the keel, rudder and inner components sometime next week...... It's nice to make something again with wood.
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    Justin Valleau
    I thought I was smart once, but I learned different.......
    http://www.butterfliesandbirds.org/footystuff.htm

  3. #3
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    Default Re: Build Log first sailboat build - footy Razor

    Justin,

    Thanks for the thread and pictures - it seems to be going very well and you are clearly at home with wood.

    Razor is a sweet boat and IMHO will take a beginner a long way in the class. When the time comes it will pay to keep weights of equipment fairly well to the rear - this chiefly means the batteries.

    I have little doubt that Bill the designer will be reading the thread - he would probably appreciate an email anyway as you progress. We owe him a lot of gratitude for making his designs available.

    Look forward to hearing of your progress, and it is instructive to hear evenof the debates you may be having with yourself about internal fixings, etc. Are you going for a transom-mounted rudder? Renovable of fixed keel?

    If we can help - please ask

    andrew

  4. #4
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    Default Re: Build Log first sailboat build - footy Razor

    Whoa!! Whoa!! Whoa!! Get rid of the Elmer's glue!!! Most "carpenter glues" are not waterproof. They have no place aboard any boat. All you should need is some CA glue (it's nice to have both thick & thin) and some 5-minute epoxy (the small, cheap, two-tube package from the hardware store will suffice). A balsa boat can be soaked with spray on clear polyurethane to seal the wood.

    Happy Yachting - Kip
    Happiness is a case of beer & a broad reach home!!

  5. #5

    Default Re: Build Log first sailboat build - footy Razor

    Quote Originally Posted by Some Guy View Post
    Whoa!! Whoa!! Whoa!! Get rid of the Elmer's glue!!! Most "carpenter glues" are not waterproof. They have no place aboard any boat. All you should need is some CA glue (it's nice to have both thick & thin) and some 5-minute epoxy (the small, cheap, two-tube package from the hardware store will suffice). A balsa boat can be soaked with spray on clear polyurethane to seal the wood.

    Happy Yachting - Kip
    Ok, but questions...... If the exterior of the boat is sealed, why not wood glue?

    Just trying to understand about this stuff. I'm not knocking the post, just asking questions and seeing if my thoughts are way off here....

    First of all I have been told many times that CA is bad for balsa, it makes it very brittle and the balsa tends to weaken right around the glued area. This is from model airplane experience, none of the airplane guys will use it around here and I have seen it too, since I started with CA on this hull and noticed how brittle the wood got. Is that not an issue?.... Also CA is not waterproof either is it? It will dissolve in water after a short time from what I've seen?... I had understood that CA was used because it was fast setting and speed up the glue process.... There are more waterproof versions of wood glues. TitebondII is supposed to be good. Epoxy is an option. I've never tried it. I can try that.

    If the boat has been sealed inside and outside with an epoxy or other good finnish, would it not matter about the glue? Just trying to understand, although I do understand that nothing is totally waterproof. Water molecules that are already in the wood will work from the inside and water molecules can get through most every finish? (supposedly).
    Justin Valleau
    I thought I was smart once, but I learned different.......
    http://www.butterfliesandbirds.org/footystuff.htm

  6. #6
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    Default Re: Build Log first sailboat build - footy Razor

    Your one guess was right, somehow a little water can get in. Maybe from deck hatch area or near deck hole for mainsheet or mast tube. And with wind gusts and a wild ride, the bows are known to become submarines.

    Hold on Justin, you may have some fun rides as shown on the Footy site Photos section.

    I used the 5 minuter epoxy w/a little microballons mixed in.
    Last edited by ffastffrank; 09-25-2008 at 03:37 AM.
    Best Regards, Frank

    US-12
    Soling 1M
    Fairwind
    ASymetrical Stern Footys
    FF-1 007 "Half @$$" w/Flames
    FF-2 007 "GoldFoot" w/Direct Drive Rudder

  7. #7

    Default Re: Build Log first sailboat build - footy Razor

    Quote Originally Posted by Andrewh View Post
    Justin,

    Are you going for a transom-mounted rudder? Renovable of fixed keel?

    If we can help - please ask

    andrew
    The rudder tube through the hull, just at the transom's inner edge. Probably a fixed keel.

    Planning on Brett's design for a sail, two regular size servos, receiver, etc. What's a good weight for the keel bulb on the Razor?

    Thanks,
    Justin Valleau
    I thought I was smart once, but I learned different.......
    http://www.butterfliesandbirds.org/footystuff.htm

  8. #8
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    Default Re: Build Log first sailboat build - footy Razor

    Just enough to let her sit at the waterline (nominally the bow chine and transom point touching the water) is a good overall weight.

    But then biassing the weight well to the stern is then the hot setup so that you enjoy downwind sailing. (Most footys and all razors bury their bow downwind and get hyperdarty)

    From memory my bulb is about 180gm, and seems pretty nearly right, and the original setup had one standard servo, and one mini (probably 20gm). I have now shed a lot of weight from the servos, cells and rig, but don't feel the need for more ballast. My need is to replace the nut behind the wheel with a talented driver

    andrew

  9. #9
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    Default Re: Build Log first sailboat build - footy Razor

    Justin,
    Indeed, CA is not waterproof & it will ultimately fail if subjected to enough moisture. Carpenter’s glue is even worse because it’s boiled cows (or some evil derivative thereof). I use CA just for the sheer convenience of its fast cure time. Epoxy would be a superior adhesive but it’s obviously a more time consuming choice. A good compromise that seems to work is to assemble the panels with CA, apply epoxy adhesive filets to the interior seams & then coat the entire thing inside & out with laminating epoxy to seal everything. I’ve never really noticed any problems of CA making balsa too brittle for toy boats (maybe because I always slop epoxy on everything). Aircraft must certainly be subjected to much more stress than a 12” boat. More likely than not, the biggest stress on a 12” boat is toting it to the pond. Once they’re in the water they’re fairly safe. You could certainly use an alternate adhesive such as Titebond but I don’t really see the point. Epoxy adhesive would be a superior choice, especially if your plan was to coat everything in laminating epoxy. The two would be capable of chemically bonding to each other, at least for a while (upwards of a week, the longer you wait the less chemically cross-linked the bond between the two will be). I personally use 4 different things on a toy boat; thin CA, thick CA, SuperBond epoxy adhesive (with the medium activator) from FGCI and 3:1 ratio laminating epoxy from the same folks. FGCI is Fiberglass Coatings Inc. in St. Petersburg, Florida U.S.A. I hate to sound like a salesman for their stuff (or a broken record) but neither do I like to see people get swindled on epoxy products. The SuperBond adhesive is so wonderful to work with it defies description. Actually I’m lying, I have described it, there is a thread on here somewhere entitled, “In Praise of Products”. If I had to make a top ten list of “Miracle Products”, SuperBond adhesive would certainly be one of them. Loctite threadlocker in “stick” form would be another but that’s a slightly different saga. Since I have lost count of this evening’s ration of Heineken (Hey, it’s prescription), I believe I’ll add one further magical marine product; good old 3M 5200. It’s more of a big boat thing but I have seen it used with marvelous results on Soling One Meter hull to deck joints. As a final note (on the broken record), if you feel that the boat building bug has bitten deep enough, I highly recommend laying in a supply of Superbond adhesive (the small cans will go a long way) & say a gallon kit of the 3:1 laminating epoxy. You’ll blow a hole in $80 but you can build an entire fleet with a gallon of goo. If possible keep it in the refrigerator, it will stay fresher longer. Often times this is not possible due to objections from the major domo. In that case you’ll have to adapt. I look forward to seeing further progress of your build.

    Happy Yachting - Kip
    Happiness is a case of beer & a broad reach home!!

  10. #10
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    Default Re: Build Log first sailboat build - footy Razor

    Justin

    May I weigh in with a strong recommendation to use balsa cement!

    Its light, quick drying, cheap and easily made. It also makes you happy as you use it, Balsa cement joints are stronger than the wood, totally waterproof, can be sanded easily (and can always be opened again with a dash of nail varnish remover)

    As I know you know, simple generally wins it in the long run

    andrew - firmly bonded to the past

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