Main Sail Repair (Sumner type question)

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Sep 29, 2008
1,980
Catalina 310 #185 Quantico
Sumner, et al, In the last race of the year it was a bit fun, but I did have some sail damage. The biggest issue is I need to replace the patch where the reef is as it tore a bit. I emails Sailrite and as usual they gave some great advice, but I am wondering what the best way to cut the sail cloth is for sewing. Can I just cut it or do I need to use a hot knife? I have a Harbor Freight hot knife that I use for trimming ropes (http://www.harborfreight.com/130-watt-heavy-duty-hot-knife-66182.html) and it has been great for that, but I am not sure it is appropriate for this. Below is what Jeff from Sailrite recommended which I am probably going to follow. Thoughts?

The Dacron seems a bit heavy, I would use 3 layers #100195 7.4oz Dacron. You would remove the old patches then install the replacement patches the same size as the old. You'll find all the patches on one side of the sail, the new patches should be placed on the same side, not opposite sides.
Use a #2 brass spur grommet #26309 which will require a #2 spur die set #18203.
Use V-92 thread #20204 with an Ultrafeed or other industrial machine, use V-69 #20203 with a home machine, needles size 18-20 and 16-18 respectively for the thread. Finally #659 seamstick.

 

Sumner

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Jan 31, 2009
5,254
Macgregor & Endeavour 26S and 37 Utah's Canyon Country
Sorry I can't really help. We don't have any sail experience ourselves. If we have time in the next couple weeks we do hope to replace the brown UV covering on the luff of our Genoa to blue to match the other new items for the boat.

If they do recommend cutting the material with a hot knife here is another alternative to what you have if it doesn't work (I'm not familiar with the HF knife).....



A soldering gun with a cutting tip. I ground a tip like what is in the gun into the shape of the one on the table for more intricate cutting, such as installing the common sense fasteners and for making....





...cutouts in fabric. It works great and the part numbers are here....

http://purplesagetradingpost.com/sumner/macgregor-canvas/canvas-21.html

We finally broke down and bought a really nice....



...hot knife for all of the recent projects and it worked great on the long straight cuts or moderate curved cuts, but I still use the soldering gun for more intricate work.

Please post pictures of the repair as you do it. I'd like to see the work,

Sum

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