new 12" mid horn design.....

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13 years 11 months ago #11002 by bee
Replied by bee on topic new 12" mid horn design.....
I do like this time of year, everybody seems to be building or updating there systems for the summer. Today i started on the new 12" horn....... ive made up a jig to cut most of the parts to make up the horn mould. Ill post up some pics in a mo.

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13 years 11 months ago #11004 by bee
Replied by bee on topic new 12" mid horn design.....
This is a shot of the jig for cutting out circular parts to mould,



A close up of jig and router....




This is a shot of me checking the jig all lines up and works........



And finally the finished article...... well one of a few needed.





I will post more photos of the build as i go. smiley33

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13 years 11 months ago #11015 by bitzo
Replied by bitzo on topic new 12" mid horn design.....
smart idea this jig. you have only a tiny nail hole. I use the router rail to do this type of work...it left a big bolt m6 hole.

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13 years 11 months ago #11016 by chaudio
Replied by chaudio on topic new 12" mid horn design.....
I use an even simpler method. Router with 24mm collar, strip of wood with 25mm hole then just bang a nail through at whatever radius you require!

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13 years 11 months ago #11017 by bee
Replied by bee on topic new 12" mid horn design.....
chris ive used your method many a times, but this build requires each round section to be 1.5mm bigger on each section. This method gives me better controll at fine adjustments.

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13 years 11 months ago #11023 by bee
Replied by bee on topic new 12" mid horn design.....
I managed to get a few more bits cut today....... getting there......





You can see the horn starting to take shape. A little bit of sanding to do and a few more sections to cut.

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13 years 10 months ago #11096 by PatricJ
Replied by PatricJ on topic new 12" mid horn design.....
Make any progress recently, Bee? smiley1

Thanks for throwing down the pictures, it makes a lot more sense to see it done for a guy like me. Thanks :thumbup:

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13 years 10 months ago #11098 by bee
Replied by bee on topic new 12" mid horn design.....
yes and no, but hopefully ill get the rest cut over this weekend...... fingers crossed smiley36

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13 years 10 months ago #11104 by bee
Replied by bee on topic new 12" mid horn design.....
i got some more work done over the weekend, just 5 panels left to cut.





this shot shows the horn mould taking shape, a lot of sanding still to do, and 5 sections still to cut.




i will try to get it done by next weekend, then off to the boat yard to pick up the fibreglass and resin.

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13 years 10 months ago #11198 by bee
Replied by bee on topic new 12" mid horn design.....
ok i had some down time today, so i got the plug made, just a bit of sanding to do, then i will take my first cast from it...... ill post picks l8ter

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