by troubleScottie » Sun Oct 18, 2020 12:04 pm
The curve is part of an ellipse. Given the major and minor radius, the curves are easily reproduced. Alternatively, if you use large circles, you can get a similar look/feel.
Some of the curves are simple circles/arcs -- lower front edge, upper front edge, lower rear edge.
The attached pdf has the same design done with both. Finally, assuming you are copying the design, the design has the curves and their edges drawn over a grid. The difficulty of the grid design is it is more difficult to change the curve
The circles/arcs are easily cut with router and a simple radial arm. Ellipses require a more complex jig.
Alternatively, one can use splines -- long thin flexible wooden/metal bars 1-2" x 1/16-1/8". Fixing the ends at the same positions relative to each other with the same orientation will give the same continuous smooth curve.
- Attachments
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Profile-Grumman2.pdf
- Grumman2 Profile: using circles and ellipse.
- (82.81 KiB) Downloaded 94 times
Michael Krolewski
Scottish Terrier Fancier