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Post by Jim on Oct 30, 2019 14:53:08 GMT
I was advised to use a hacksaw blade in a jigsaw running slowly. Not sure how I would get proper straight lines though but I guess doing it really slow it might work. clamp a piece of wood to act as a guide, some jigsaws have a guide.
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Post by bodger on Oct 30, 2019 14:55:37 GMT
I was advised to use a hacksaw blade in a jigsaw running slowly. Not sure how I would get proper straight lines though but I guess doing it really slow it might work. that is a recipe for shattering the edges and those may will propagate. any reciprocating device is a risk for snagging and shattering. please don't do it.
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Post by Telemachus on Oct 30, 2019 14:55:52 GMT
I think either are ok but Perspex is softer, polycarbonate is more prone to splintering/ cracking. In both cases, work on it when it is warm. Cold Perspex is pretty brittle. And go slowly. I beg to differ. Polycarbonate is very soft and almost indestructible by impact, it just deflects and recovers. I recall it was/is used for the bodies of RC model racing cars and it will never split or crack from an impact, but because it is not hard it scratches very easily. I would suggest that it is quite unsuitable for windows for this reason. Perspex (acrylic) is hard, brittle and must be worked with care - for example holes should be drilled with a blunt drill bit that wears away the material and doesn't snag on it. I have used it for the windows of my last three boats, including heavily curved windows on an Edwardian style launch, all with great success. It is not as hard as glass, and will scratch, but not to the extent of polycarbonate. So, perspex acrylic every time. Of course if you really want it to be bullet proof then thick polycarbonate is essential, but it would need to be about an inch thick, and you would need to replace it every few weeks because it will get scratched quickly. I have suffered several reasonable impacts on my perspex windows when navigating through tree-strewn backwaters against a strong current, but no damage that couldn't be polished out in no time. I used a mini circular saw (the blade is about 40mm diameter) to cut straight and slightly curving cuts, if done with care it will not shatter. A very fine jigsaw blade might work, but it will probably clog very quickly. I fired up the cuts with a belt sander medium grit, done very gently. Yes you’re right, I was getting confused!
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Post by Telemachus on Oct 30, 2019 14:56:48 GMT
When cutting Perspex canopies for gliders I’ve always used a cutting disc on an angle grinder. It kind of melts its way through.
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Post by lollygagger on Oct 30, 2019 16:10:11 GMT
Anything you run along the surface, like a jigsaw, might scratch it. My jigsaw would.
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Post by Deleted on Oct 30, 2019 16:13:46 GMT
Duck tape
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Post by Jim on Oct 30, 2019 16:53:17 GMT
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Post by bodger on Oct 30, 2019 17:10:34 GMT
The end is sharpened to approx 60deg. I've made them out of broken ha ksaw blades. Grind end to 45dg, sharpen that to a 60deg angle, grind out the recess behind the cutting edge on grindstone. The tool cuts a groove as you draw it towards you. whatever turns you on. ..........................
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Post by Deleted on Oct 30, 2019 19:59:12 GMT
Anyway I'll fit the 11 square panels of 5mm perspex and see how I get on with it. The only cutting will be putting radii on the corners. The front windows are okay. A bit sun-nackered but not too serious. The back ones are totally gone.
As the panels are all bolted in with six M6 bolts and the steel frames are tapped I am going to replace two of the bolts with stainless m6 studs so that I can securely bolt the new panels (on self adhesive neoprene tape) leaving a short protruding stud top and bottom onto which I can mount another acrylic panel of a non transparent nature. For privacy and also to protect the new panels from sun damage.
And to help with the bullet proofing obvs.
All spun on with a M6 nut spinner. So much better than using curtains or blinds.
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Post by Jim on Oct 30, 2019 20:41:25 GMT
Anyway I'll fit the 11 square panels of 5mm perspex and see how I get on with it. The only cutting will be putting radii on the corners. The front windows are okay. A bit sun-nackered but not too serious. The back ones are totally gone. As the panels are all bolted in with six M6 bolts and the steel frames are tapped I am going to replace two of the bolts with stainless m6 studs so that I can securely bolt the new panels (on self adhesive neoprene tape) leaving a short protruding stud top and bottom onto which I can mount another acrylic panel of a non transparent nature. For privacy and also to protect the new panels from sun damage. And to help with the bullet proofing obvs. All spun on with a M6 nut spinner. So much better than using curtains or blinds. I thought pink curtains were de rigeure down your way. Does Dulce smell of seaweed BTW?
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Post by Deleted on Oct 30, 2019 20:45:23 GMT
The front ones arrr going to be quite complicated. I've removed a couple and they are so well cut I wonder if it was done by a CNC laser cutter or something. Probably not I expect it was just tombstone Ted (Bloke who made the boat) doing a proper job. I'm not at all sure I can do it that well so may consider having them copied by someone with a CNC machine. It's a well thought out and executed bit of work. I got a custom number plate made to reinstate the original name. I think it looks rather good. Better than the sign which was in its place "the beatings will continue until morale improves".
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Post by Deleted on Oct 30, 2019 20:46:15 GMT
Anyway I'll fit the 11 square panels of 5mm perspex and see how I get on with it. The only cutting will be putting radii on the corners. The front windows are okay. A bit sun-nackered but not too serious. The back ones are totally gone. As the panels are all bolted in with six M6 bolts and the steel frames are tapped I am going to replace two of the bolts with stainless m6 studs so that I can securely bolt the new panels (on self adhesive neoprene tape) leaving a short protruding stud top and bottom onto which I can mount another acrylic panel of a non transparent nature. For privacy and also to protect the new panels from sun damage. And to help with the bullet proofing obvs. All spun on with a M6 nut spinner. So much better than using curtains or blinds. I thought pink curtains were de rigeure down your way. Does Dulce smell of seaweed BTW? I have got a pink curtain on there. Just one. An obvious solution stuck on with magnets but 25 of them ? Hmm.. No seaweed smell in there. Actually it smells of dust and is bone dry.
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Post by Jim on Oct 30, 2019 21:28:42 GMT
I thought pink curtains were de rigeure down your way. Does Dulce smell of seaweed BTW? I have got a pink curtain on there. Just one. An obvious solution stuck on with magnets but 25 of them ? Hmm.. No seaweed smell in there. Actually it smells of dust and is bone dry. Whoosh, as dulce/dulse reference whizzes by andrew.
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Post by Deleted on Oct 30, 2019 21:30:20 GMT
Never heard of it.
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Post by Jim on Oct 30, 2019 21:47:28 GMT
Well, you have now. Edible seaweed. Are you going to glue your windows in with erudite?
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