|Dinghy Project 3|
Last updated: Lake Placid, 12 May 2016You can never have (or build) too many small boats :-).
Here is my previous dinghy. Here is the one before that.
Lake Placid, 18 Jan 2016This one will be a Spindrift Dinghy 11N, another stitch&glue nesting dinghy.
Here are the costs (so far) ...
|Plans||$66||~$5||B&B Yacht Designs||The plans consisted of 13 A3 (11½" x 16½") sheets of drawings and instructions, and 25 8½" x 11" pages of material list, sources, their prices for materials and hardware, etc. The plans include pretty good detail on the sail rig. There is a helpful list of recommended sources for the plywood, aluminum tubing for the mast and other materials. All in all, it looks like a pretty good set of plans.|
|Plywood||5 sheets @ $72.80 = $364||?||World Panel Products|
|Fiberglass & resin||$1032||0||discount marine supplies .com||
> 5 gallons of West System epoxy.
> 10 yds of 4 oz. cloth that I plan to apply to the bottom, sole and tops of the thwarts (seats). The cloth added $137 to the cost not in the original plans from B&B.
> 3 6.7oz containers of 406 West System Colloidal Silica in this order. Probably more than I need, but it seems like I never have enough.
> $50 of accessories - mixing sticks, roller covers, etc.
|Clamps for joining the halves||
> A pair of Perko 1112DP0CHR Hold Down Clamps. These were expensive ($60 each), but I expect they will be very convenient. Garry Prater, who came up with this idea, described how he was able to join the two halves in the water and how he did that once in gale-force winds in an emergency - when he had to launch his dinghy to carry out an anchor in the Intracoastal Waterway during a sudden storm. (Times like that make for *very* vivid memories :-) I used these on my 10N and found it pretty easy to assemble and disassemble it in the water.
|5" dia. watertight deck plates||These will be for access to the flotation compartments.|
|Misc hardware||$14||$10||Mauri Pro||
> Schaefer 1 7/16" sheave for the top of the mast.
> Oarlocks and sockets. I like these sockets because they have replaceable nylon sleeves and are nice and quiet.
|Line, blocks||$218||0||P2 Marine||
> 46' x 5/16" and 126' x 3/16" of NER Sta-Set in various colors.
> Harken 29mm Carbo blocks - 1 single w/ becket and 2 singles
> 3 Harken Micro Blocks and 1 Harken Micro Traveler Block
> 4 Harken 4mm Shallow Bow Shackles
|Sail||$536||?||B&B Yacht Designs||
> The sail ($420) comes with a zippered luff, 1 reef point. Also included are the insignia and sail# and a sailbag. The one I got from them for the 10N seemed to be well made.
> Roll of 3" tape.
> Misc hardware - the gudgeons and pintles, a quick release clam cleat, gooseneck, outhaul blocks, eyestrps, clam cleats
||Online Metals (STAINLESS RECTANGLE 316/316L)||
> 3' of ⅛" x 1½" Stainless Steel Flat Bar T-316/316L for the mast plate and the brackets to join the two halves. I'll have a local fabricator drill and countersink the holes and make the bends.
$14.65 Stainless T-316/316L Rectangle 0.125" x 1.5" Cut to: 36"
|Mast||Online Metals (6061-T6 ALUMINUM TUBE)||
> Three 6' lengths of 6061-T6 Aluminum tubing for the mast.
$73.67 Aluminum 6061-T6 Bare Drawn Tube 2.25" x 0.065" x 2.12" Cut to: 72" $51.19 Aluminum 6061-T6 Bare Drawn Tube 2" x 0.065" x 1.87" Cut to: 72" $43.03 Aluminum 6061-T6 Bare Drawn Tube 1.75" x 0.065" x 1.62" Cut to: 72"
|Paint, etc||~$200||-||Local hardware store||Petit Easypoxy: 1 quart of Undercoat, 2 quarts of Semi-gloss White, 1 quart of Bikini Blue.|
|~$300||Edwin's Boat Yard||1 pint of Sea Hawk Primer, 2 quarts of Sea Hawk 44 Bottom Paint|
|?||Various||Hinges for the oar holders, 4 small cleats, caulk to bed the fittings, screws, brushes, etc, etc.|
|Shipping & customs||-||?||Abaco Shipping, Arawak Agency (Customs Brokers)|
|Total||$xxxx||(probably missing a few small things)|
PlanThe plan is to be pretty similar to the 10N I built a couple years ago, with the following changes:
- 11' long instead of 10'
- I built the 10N "like a battleship". On this one I plan to use less fiberglass to protect the surfaces. I think I'll use 4oz cloth instead of 6oz. And use it on just the bottom, the sole and the tops of the thwarts (seats). The downside is that I will need to check the surface for breaks and checks from time to time. On the 10N, this was not necessary. There's no free lunch.
Man-O-War Cay, 2 Feb 2016
|I shipped the materials over on the Duke from West Palm Beach to Marsh Harbour. After clearing customs in Marsh Harbour, they were put on the cargo boat to MOW. Here they arrive at the Public Dock on MOW. The Public Dock is just a stone's throw from Edwin's #2 where I will do the construction.|
Man-O-War Cay, 26 Feb 2016
Lake Placid, 12 May 2016
I cut out the pieces of plywood as specified in the plans and attached the
sides to the bottoms using 7-8" lengths of 3" fiberglass tape as
the plans suggest. I may have been a little too forceful (errrrr,
careless) when trying to unfold them in the "butterfly step", but
all 4 pieces of tape ripped IMO way too easily as we were "unfolding" the
On my previous dinghy, I used West System 3" Episize Glass tape. On this one, I bought the 3" fiberglass tape from B&B. I think the West System tape was appreciably stronger. The tape from B&B wets out much more easily, FWIW.
|To recover and try again, I sanded off all the old fiberglass tape and resin. For the second try, I used two layers of fiberglass tape on each side. In addition, I added a bunch of 12 gauge copper wire ties between the panels. Click on the image to the right for a better view.|
Unfolded, wired and initial fillets on
I had pre-drilled the holes for the screws fastening the gunwales to the breast hook (ie. a dry fit before applying resin) so that all went together easily when it came time to glue everything together. I didn't install the knees until after the resin attaching the gunwales had set up. I think that made it a lot easier and didn't take anything away from the results.
Chad with his father, Blake, helped me install the gunwales. This helped immensely. And it was a real treat to have these experienced and most capable guys help.
Chad and the boat yard were very gracious in putting an unused flybridge over my work area to give me some shade. Even though it was still only April, the sun and heat were already getting strong.
After the gunwales had set up, I flipped the hull over, rounded over the
chines using a small block plane and sandpaper, and then glued 3"
fiberglass tape over the joints.
Then Chad helped me put the hull upstairs in Edwin's #2 for storage until I come back in December.
Lake Placid, 12 June 2016Even though this 11N is only 1' longer and just 4" beamier than the 10N I built a couple years ago, it SEEMS SO MUCH LARGER inside. I can't get over it. BTW, the freeboard is about the same - I had added 2" to the 10N's freeboard.
Spindrift construction blogs:
Other construction blogs:
Minipaw Dinghy "No Regrets" (nice writeup. I like his paint job)
PDRacer, future nesting dinghy
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