tegirinenashi wrote: ↑
Sat Nov 14, 2020 4:39 pm
....Then a patch of sticky sail repair tape on top. ....
Sail repair tape does not stick to Dacron. You need to use "Insignia" or "mark cloth" tape. Apply it smoothly and heat the glue with a hair dryer to set it.
Definitely pull the bladder out. It makes a lot more room to work and reduces the risk of damaging the bladder. Here's a good video on how to do that.
I would try and pull the torn section out through the zipper. If you can get it out and lay it flat and apply the tape smoothly that would be better than trying to apply fabric and glue from the inside.
If you can't get the leading edge inside out then open the seam so you can lay it out flat.
To resew the leading edge use polyester thread. Upholstery thread is ok. Sail making thread it better. It's called "bonded polyester". Sew in and out using the existing holes. Sew one way, then back the other way so that you have neat stitches on both sides.
You can hand sew the patch the same way. I don't know if your tear needs sewing. You'll have to work that out for yourself. I suspect it will if it's of any size. Canopy tears don't need sewing but the leading edge stretches under pressure.