And , did the paint scraper not lever off the glass okay ? [I think I left the scraper on the top shelf , from memory , of your shelves to the left of the bench]
either the two layers of resin BEFORE laying down any cloth [remember me saying that ?]
or
maybe
release agent
is needed with epoxy fin panels ?? [I think it was "Finfection " who mentioned vaseline on another recent fin thread ?]
anyone ??
cheers ,
ben
…with polyester resin , I find with brushing on the two layers of laminating resin BEFORE putting cloth on [then extra resin] , I have never had a problem with the glass not coming off cleanly [as long as you have the masking tape on the edges to pull up on , there will be no risk of the glass plate under the panel breaking ].
Grant , I can’t help thinking that the extra pressure from the wood and the bricks on top of the fin panel is what has caused / contributed to this problem …better letting the air harden the epoxy , and to have a slightly thicker curved surface for foiling , than two FLAT inside and outside edges to the panel . Live and learn [hopefully] , eh mate ?!
With my melamine board I lay down the tape, wax it (just one layer), then start my layup. Brush some resin down first so that wax doesn’t get on the first layer of glass.
When I’m done the tape allows me to get a putty knife under the sheet, then it’s just a matter of waiting for air to get under to let the panel come up. No sticking problem even with the texture of the melamine.
Maybe it’s because you guys use glass which has such a perfect surface, also you guys use a sheet of glass as big as your panel right? Not much, much bigger like my board.
I was at the plastic store the other day and got to talking with the manager. He said he had had a rocket builder use 2 sheets of polycarbonate to sandwich his fin panels in to get them absolutely straight and to squish all the excess resin out. To squeeze the resin he at first used his truck… Just drove the truck up onto the sandwich. Later he got high tech and used an anvil.
Anyways, I think the polycarbonate is probably the best idea since if your panel gets stuck to it you can always bend the poly till the panel comes loose.
anyway, looking forward to seeing the canards nice & shiny & polished. good work mate.
reckon as a thruster setup you will find them less drivey than regular longer raked thruster fins. & less hold too i imagine. i look forward to a performance report.