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<blockquote data-quote="archive10" data-source="post: 947013">Funny design of dishes. Of course they do look to be real fibre-glass dishes, not SMC or ABS (SMW) dishes.(Reminds me a bit of boat hulls).Notably, the performance of the dish is never better than the mould (mold?) it was made from.So, obviously someone did some maths, and got busy with some plywood/clay/plaster to make the mould, and then busy with resin and glass fibre matts and mesh to make the final product. And hope they got it all right, and that the shape was paraboloid enough etc.However - if I were a small fibreglass outfit, looking for new stuff to grow my build-a-boat business from in the late 80's, I might decide to hop on the satellite dish wagon. And when considering to do som dish design from scratch, I'd probably glance heavily at my CM/Prodelin SMC dish, and decide that the surface of a SMC dish product was darned close to what I needed (unless I wanted to try some weird antenna shapes) - and probaly make a mould from that instead of all the calculation and plywood and what have you.I would probably also borrow the size of the mounting frame, but as I was making a mould of the front of the dish, I would not benefit from the support rib structure in the back of am SMC dish. Rather a square boxy thingy with a few holes would do.And then I might just, conincidentally, end up with something that looks surprisingly like the dishes in your pictures...But then again - that's just me thinking out loud of what I'd do...<img src="https://www.satellites.co.uk/styles/default/xenforo/smilies/smile.png"&nbsp; class="smilie" loading="lazy" alt=":)" title="Smile&nbsp; &nbsp; :)" data-shortname=":)" /></blockquote>

[QUOTE="archive10, post: 947013"] Funny design of dishes. Of course they do look to be real fibre-glass dishes, not SMC or ABS (SMW) dishes. (Reminds me a bit of boat hulls). Notably, the performance of the dish is never better than the mould (mold?) it was made from. So, obviously someone did some maths, and got busy with some plywood/clay/plaster to make the mould, and then busy with resin and glass fibre matts and mesh to make the final product. And hope they got it all right, and that the shape was paraboloid enough etc. However - if I were a small fibreglass outfit, looking for new stuff to grow my build-a-boat business from in the late 80's, I might decide to hop on the satellite dish wagon. And when considering to do som dish design from scratch, I'd probably glance heavily at my CM/Prodelin SMC dish, and decide that the surface of a SMC dish product was darned close to what I needed (unless I wanted to try some weird antenna shapes) - and probaly make a mould from that instead of all the calculation and plywood and what have you. I would probably also borrow the size of the mounting frame, but as I was making a mould of the front of the dish, I would not benefit from the support rib structure in the back of am SMC dish. Rather a square boxy thingy with a few holes would do. And then I might just, conincidentally, end up with something that looks surprisingly like the dishes in your pictures... But then again - that's just me thinking out loud of what I'd do... :) [/QUOTE]

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