WebLetter 20An Occasional Publication for the Home Boat BuilderGlen-L Marine Designs - 9152 Rosecrans Ave. - Bellflower, CA 90706 In this issue
Glen-L Update
I would like to thank all of those who have contributed to this WebLetter.
Barry Witt Pontoon vs BargeThis is a story of myth, but I'll start with science. One cubic foot of volume will displace approx 62.5 lbs of water (depending on the water). Where is this leading... to a re-occurring discussion about pontoon boats. Facts:
Now scroll down so that you cannot see the previous facts. Quiz: You have two boats, one a typical barge-type houseboat hull, the other a pontoon boat of equal length and same overall beam.
Extra credit quiz: You have two sealed boxes, one foot cubes. Box A is empty, box B contains one pound of foam. Which will sink lower in the water? For further study, see Archemedes in your encyclopedia. My father and a Glen-L Rebel
Guest Book Entry, Monday, July 24, 2000 at 19:21:05 name: Guy Middleton Comments: My father built a Rebel in 1959 in Vancouver, B.C., Canada with full length stringers, thicker transom and bracing in addition to the plan callouts. My uncle was a sawyer and it was constructed of full length plywood, glassed over the bottom and up 4" on the sides. In 1964 we purchased a rep's demo 100 HP Merc (short shaft) and propped with a 19" two-blade. We buried the 45 mph speedo at 1/2 throttle (we were skiers). Lake Sammish, near Bellingham Wa., was right next to the highway and on a regular basis we could outrun cars doing 70 mph. It did pound your kidneys a little in rough water, and under full throttle accelleration would stand almost straight up and clear the water, jump out a second time, right up onto a full plane, landing only on the prop and the last 4-5 inches of hull, oscillating on the prop from one corner to the other like a hydro. You could always see clear under the hull. We believe that the reps demo motor had seen special attention at the factory to "enhance" sales. In roughly 1970, we met another Rebel owner with a 100 hp Merc with a 19" two blade, also from Canada. His boat topped right near 47-48 mph, it was no competition, confirming our thoughts that the reps motor was "enhanced". The other Rebel owner's gas consumption was almost 1/2 ours, also confirming our thinking. The Rebel my dad made was a total rip! As I look back on that time period what amazes me was my dad trusted me at age 14 to take that boat out by myself! He always wanted to build a Thunderbolt though. (I emailed Mr Middleton to ask if we could use his email. His answer is below.)
Subject: RE: Guest Book entry
I wouldn't mind at all... Here's a follow up you can
include if you like (writing the initial story has triggered
alot of memories): Guy Middleton Performance Report: Tunnel Mite
To: Glen-L Here are some updated photos and a performance report. The boat handles very well at all speeds. The Tunnel Mite seems to thrive on choppy water, the stability of the hull is impressive. The turning is fairly flat. Top speed with a 25hp motor and a re-pitched prop is close to 40mph (probably a little faster with a lighter driver!), so far no tendency to flip over. This boat is a lot of fun. After I finish your Duckboat-Two, I think the Tunnel King could be next. John C. Smith
Shop talk: Fiberglassing your sailboat's centerboard trunkFiberglass is advised for the inside of the daggerboard or centerboard trunk to protect against abrasion. This is obviously not something that can be done after assembly. Typically, a trunk will be assembled with two sides, and a spacer block at each end. One side usually has the spacer blocks attached, the other is a piece of plywood. Both halves will be covered separately with a layer of fiberglass cloth. The half without the spacer blocks is covered so that the material extends to the edges of the trunk where it is trimmed off flush. On the side with the spacer blocks, it is best to fill the inside corners with a resin putty fillet (epoxy resin plus silica) so the fiberglass will not lift and form air bubbles at the corners. Also, radius the spacer block inside corners. Apply the fiberglass to this half across the plywood, up over the spacer blocks and trim flush with the edge of the trunk side. Completely sand the fiberglass surfaces of both halves to the desired degree of smoothness, but do not apply any paint. The trunk halves are now ready for assembly. With some centerboard trunks, provisions must be made before assembly for various centerboard components such as the centerboard pennant (the line which raises and lowers the centerboard) and the centerboard pulleys that may be a part of the pennant tackle. The trunk halves are assembled with screws being recommended for larger centerboard trunks, and with nails or screws for daggerboard trunks. The preferred glue is an epoxy resin with fillers added to form a thin putty. This putty gasket insures that no moisture will get through the junction. When the two sides are screwed together, the putty will squeeze out at the edges. Use a long dowel to scrape off inside putty and to form a fillet. If there is a leak in a sailboat, it is inevitably around the centerboard trunk. When preparing the outside of the hull for fiberglassing, the edges leading into the trunk should be radiused. During the fiberglass process, cloth is tucked into the trunk to protect and seal the bottom planking/trunk junction; tuck in as far as practical. Sand off any burrs on the inside to prevent the centerboard or daggerboard from hanging up. We would use a coarse belt sander with a piece of one-by fitted inside. Note: The reason for the fillets and rounded edges in the above description is that (1) fiberglass will not conform to a sharp interior corner and will tend to pull away, leaving a void. (2) If you attempt to fiberglass around a sharp exterior corner, the cloth will tend to lift on one side of the corner when smoothing the opposite side, then visa versa. Salt water and wood
Recent emails:
Subject: Two Additional Boat Pictures
Hello: REALLY enjoy the boat !!! It catches everyone's eye !!
Regards, (Mr. Holt used a Mariner 15 hp outboard.)
Subject: Guest Book entry name: Norbert Chartrey Comments: I have several boats from your plans and they have all been great to build and have performed outstandingly. While I have built a number of boats from other plans, yours are by far the best I have ever used. The boats I have built are the Sea Knight, the Ski-Tow, the 8-Ball, Tuffy, and a 14-ft drift boat (I think the plans included three different sizes.). I have also purchased plans for the Huck Finn, a dory, and a rowing dory.
Subject: RE: Glen-L Order
Barry, ANSWER: I have checked through all the reference books we have that list boatbuilding woods; none list walnut or black walnut. I am not sure what characteristics it has that makes it not desireable, could be prone to rot or not stable? Some of our builders have used it on dashes and decks and were happy with the results, but this would have been shortly after construction, don't know how it stood up. I would not use it for frames or longitudinals, unless you can find reference to it being used successfully.
PS. In the US Dept of Agriculture Wood Handbook, "Woods
that cup and tend to pull loose from fastenings when exposed
to weather"; walnut, black... Pronounced (tendency to
cup). (Any comments from builders?)
Subject: Registry update
Riviera / Mark Bronkalla Hi Barry and Gayle, The boat has been fun to build and I have received a lot of support from family, friends and new boat building acquaintances. Thank you for your help in answering questions and getting the parts I needed. We launched the boat for the first time on June 23rd on Pewaukee Lake. The Riviera runs well as the family ski boat. Lots of room and plenty of power. It can pull a skier at only 2500-3000rpm. Top speed at this time is 46mph at 5000 rpm. The boat drives well and handling is excellent. Teal, my wife, now thinks that she is the captain and principal driver. It is amazing how many people stop to ask about the "restoration". All are amazed when they find out it is new construction. More (hopefully better) photos to come after this weekend. Hopefully more people will see that building your dream is possible and within a reasonable amount of time. We started on the boat Sept. 1 (99) and it is now 95% complete. This was done in approximately 20 hours per week (less than most people spend watching TV). The major work left to do is the final upholstery. We are riding on the bench seats and boat cushions for the summer.
Best regards, David L. wrote: Another question please. I am finishing the 11 foot sailboat from your plans and have used epoxy resin on the marine plywood. I will need to paint this boat. What do i use for paint over the epoxy? I do not see paint in your supply list. Am i missing something????
ANSWER: Once the amine blush is cleaned off and it is well
sanded, any paint that will stick to a non-porous surface
will be ok. We normally sand the surface to 100 grit, prime
with a high build primer, sand to 220 or 440 grit and paint.
We normally use InterLux Brightside, but other marine paint
companies have comparable products. Brightside, like most
others, says not to paint below the waterline. If you leave
the boat in the water for more than a few days at a time, it
will blister.
Sunday, July 9, 2000 Comments: Hello to everyone at Glen-L. I took my first boat ride when I was 1 year old (my Grandpa's home-made woodie) and got my first Glen-L catalog around 1960, when I was 11. I built two boats before I turned 14 and another one in my 20's which was stolen (somewhat flattering!). I grew up around Lake Minnetonka, where everyone I knew had Chris Crafts or Lymans or Higgins, etc. We had a cabin up North (of MPLS), and aluminum boats were "de rigeour", but I never lost my love of wood boats. About three years ago I caught the "build-a-boat bug" bad, and began learning, researching, drawing and designing. After a lot of misguided effort I turned to Glen-L. When I received your boat design catalog I was already pricing tools and plywood. I flashed on some of your designs right off the bat, because, in terms of hull design or profile, they were similar to the lines I was 'drawing'. I was particularly interested in the Audeen, Miss Mist, Bonanza, and Sea Knight, all of which I bought plans for..... I enjoy your web site and some day I WILL build another boat, but meanwhile there's a bunch of stuff I need for this one....
Friday, July 14, 2000 Comments: I've had your catalog for 4 years. I started building my first boat last month. The "Duckboat Too". I'm having so much fun that I'm wondering why I waited so long to start. This is very relaxing and satisfying stuff, and to imagine that when I'm through, I can actually get in this thing and take a trip down a bayou or around a lake in it.
Subject: Jack Tar
Dear Gayle Bob Warner, Herts, England Walt was having trouble bending the chines into position on his Alpha 2...
Subject: chine bending made easey I soaked my chines in a 10' black plastic ABS pipe. After soaking one half of the chines for 2 days, I flipped them over and soaked the other end. I wrapped the exposed portion in plastic bags so they wouldn't dry out. The chines bent effortlessly. Walt
Subject: Doug Hodder Zip project Thanks to everyone at Glen-L for their assistance in the construction of my boat. I was thoroughly satisfied with the plans that were sent. I don't think that I had any real problems with anything that was not solvable with a phone call. To anyone who is thinking about building their own boat, you can't go wrong with these guys and their plans. They pretty much have any type of boat to suit your needs. The plans were easy to follow and very accurate. I can't wait to start my next boat. I'm a happy camper and the dog gives it 5 barks of approval. Doug and Daisy
Tuesday, July 25, 2000 at 17:01:52 name: CHRIS MAHON Comments: The TNT which I bought from Glen-L about two months ago with a friend is great. We are taking our time with it. We don't want it to sink the first time we take it out. However we are looking foward to the day in which we lauch the boat. Thank you Glen-L for making inexpensive and easy boats for us to build. Build more boats Glen-L boats, of course
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