Showing posts with label canvaswork. Show all posts
Showing posts with label canvaswork. Show all posts

Friday, June 21, 2013

Fabric slot top cover for Creamcheese

Slot top cover for a Michalak AF3
For our spring cruise this year, I made a slot top cover to keep the rain out of the cabin while sailing.  The project made me learn about new fasteners and new techniques.

Materials:
As usual, Sailrite videos helped a lot.  In particular I learned how to make the boot top by copying from a  mainsail cover.

Mast boot

Finished product

Installation details
With the cover on, it is difficult to get into the cabin.  I think my next project will to make a new version  which is more like a dodger.  It will be fitted around a fiberglass hoop and have a vinyl window forward so that someone can sit up in the cabin and see forward.
Future project - a dodger



Wednesday, May 29, 2013

A mooring cover for The Drascombe, Tenara thread

Mooring cover for our Drascombe Longboat
Having met with some success in my new hobby of canvasworking, I decided to give my father the Christmas gift of a new mooring cover for his Drascombe Longboat.  Since the cover will be out in the brutal Florida sun most of the year, I chose Tenara thread, which is made of teflon.  My other projects have used v69 polyester thread which is strong and resists UV light more than most threads, but it still degrades over time and can loose up to half of its strength after a year in the sun.  Tenara on the other hand doesn't degrade at all.

Materials:

Tenara is so slippery that both my sewing machine and my mother's couldn't get the top thread  tension tight enough.


I spent hours trying to figure out how to increase the top thread tension and finally got fairly repeatable results by putting the thread under a gum eraser that was rubber banded to the sewing arm.

Extra friction mechanism:
rubber band and gum eraser

Mama's sewing machine

My sewing machine, spool holder - prevents twist

Corner fasteners
Design features:
  • laced front panels
  • webbing reinforced spine
  • two 1/4" fiberglass hoops
At the slip

The cover is a success.  It keeps the rain in the scuppers where it belongs and protects the mizzen sail, mainsail and other cockpit items from sun and rain.

Saturday, November 10, 2012

AF3 Cockpit Tent

Fitted tent for camping
We used a polytarp for a recent trip to the Core Sound of North Carolina's outer banks and it served its purpose well.  

Polytarp cockpit tent for AF3 Cream Cheese
It kept the rain out during a 35-45 mph storm one night and sheltered us from the wind when it was in the 50's Fahrenheit.  But the tent takes a lot of time to setup, is noisy, ugly and bulky.  Running the lines under the hull is awkward.

Having achieved some sewing success with my third reef project, I decided to embark on another sewing project; a custom fitted camping tent.

Planing
I spent a few spare evenings reading through my copy of "The Complete Canvasworker's Guide" by Jim Grant.  Then I made a few line drawings of various designs including various configurations of hoops and frames.  I finally settled on a simple A-frame design slung over the sprit boom and bimini similar to what we had used in North Carolina:



Cockpit tent design - side view
Cockpit tent design - top view
Materials
Use gravity  
This project required many 10' to 12' flat felled seams.  At first I tried put the sewing machine and fabric on the floor but I quickly found out that my Janome Magnolia 7300 sewing machine doesn't have the power to pull all of that fabric.  I solved this problem by following the advice of of Emiliano Marino's "The Sailmaker's Apprentice" and constructing a gravity feed system.

Sewing long seams using a gravity feed system
Sailrite's 3/8" basting tape
I made the first seams using pins.  The results were crude and tended to have puckers.  Later in the project I ordered a roll of 3/8" Seamstick basting tape.  What a difference it made.  My seams were more uniform and took far less time.

Walking foot
Also halfway through the project, I ordered a walking foot attachment for my sewing machine.  It also makes for more uniform seams.

No boom needed
I sewed 1" polyester webbing along the centerline and terminated each end with 2" webbing and a 2" bronze ring.

Ridge reinforcement
This allows me to stretch the tent taught between the bow and stern and eliminates the need to use the sprit boom as a ridge pole.  I clip the mainsheet to the stern ring and pull it taught.

Attachments
I used stainless rings and webbing to attach the cover to the boat.  I found sailrite's how-to videos to be very helpful in figuring out the mechanics of assembly.
Corner Attachments
Ready for assembly
Attachments and Setup
I sewed in sleeves for fiberglass tent hoops but after experimenting with the fully assembled tent, I decided that the hoops added almost nothing and complicated the setup.  The sides of the tent clip to lashing hooks fastened underneath the gun'nle.

Side attachments
The bow uses a single pole with a line tied to the forward mooring cleat.

Bow detail
The stern is open to the air, .  The corners are tied to the stern mooring cleats.

Stern detail

Next steps
I am very pleased with the results.  The tent only takes about 6 minutes to setup.  I will probably sew in a few windows and I may fabricate a panel to cover the stern.