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Old 11-15-2023, 11:47 PM
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Pedal harp from Canon Creative Park

Based upon my experience downscaling the Canon Creative Park harp model to 54%, it's a medium-challenging plan. The designer is K. Yoshinaka/STpers. Built full-size, it would be 1/6 scale, about a foot tall (30 cm). Most of the geometry is reasonable, except for the teeny triangular facets that the plan has on the inside curve of where the top piece meets the diagonal piece—I omitted those bits—and it was tricky to do a clean job with the pedals, at least with the smaller scale that I used. Also it would be nice if the colored-in areas extended a little beyond fold lines as well as into the areas where other parts are anticipated to glue on, so that slight misalignment doesn't result in unprinted white areas showing. Otherwise it's an elegant shape. Note that the strings are not under any significant tension and aren't meant to actually be plucked.

As you can imagine, it doesn't take much tilt for the model to tip over backward, so I'd recommend gluing a thick brass washer or something similarly weighty inside the bottom of the vertical post portion of the model or inside the internal hexagonal support structure underneath the post. I forgot to do that, so instead later in the assembly process I put a couple thin washers inside the base under where the diagonal arm attaches, which was not enough to make it really stable.

If I were to build it full-size to the plan, I'd be tempted to modify the plan so that it has the full complement of 47 strings, rather than the included 17. Adding in-between strings to bring the count to 33 would be relatively straightforward, in terms of keeping the attachment points spaced such that the strings stay parallel, while redesigning with exactly 47 strings would take some layout work. Careful if you try more than double, since the strings would get pretty close together. (One way to make it easier, though inaccurate to the prototype, could be to have the strings come out of both sides of the top piece, rather than just one side as the plans have it.) Also, if you do go for the full set of strings, you've gotta color the C strings red and F strings black. It would look pretty nice!
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Pedal harp from Canon Creative Park-harp-4.jpg  
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Old 11-16-2023, 03:09 AM
Siwi Siwi is offline
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A bit of a cheat, but if a piece of thick clear acetate was inserted into the open area, the strings could be scored into this at more accurate spacings and ink/paint wash used to bring them out. Similar to doing window panes.
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Old 11-16-2023, 03:49 PM
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Mike Stamper Mike Stamper is offline
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Congratulations!

I made this harp a few months ago and too the same scale. I found it difficult and it looked terrible. Yous is so good and makes me look like an amateur ;-(((

I reduce the size of most Canon kits by changing the print settings to 2 pages on one A4 sheet.

cheers
Mike
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Old 11-16-2023, 03:58 PM
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An impressive piece of work. Well done.
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Old 11-16-2023, 07:08 PM
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Thanks all, gratifying to hear that you like the build. I should say that the "medium-challenging" assessment is based upon my perception of the incredible skills that some other folks demonstrate around here. The harp was about at the limit of my abilities. Typically I stick to airplane models without landing gear, propellers, or cockpit details!
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