RESOURCES

STEP 1

First things first, we need to insert the reference image in the top viewport, as always. So using BackgroundBitmap command, insert the image (I made the background 67 units wide).

When you got the background in the right position, we now need a straight line in the middle of brush on the image. So, using polyline create the line. After that, we need to create left edge, you can do that using circle command. Then, using polyline command, create a line, and using Curve:Interpolate points (InterpCrv) create a curve as on the image below:

Using all those curves, trim off the parts you don’t need, and there where two trimmed circles are, fillet using fillet command by 2 points (if you made your background image 67 points wide).

From your front viewport, using Copy command, copy your newly created closed curve by 3 points on y axis upwards.

Next, using InterpCrv command, create (by clicking only twice – start and end point) a curve between those two closed curves. You might find very helpful using end or mid option in Osnap. (find where your curve’s end is, an alternative way is to use int option, and click on the intersection of your first polyline (for mirroring) and bottom closed curve, and then using Perp, go up to the upper closed curve perpendicular)

Using PointsOn command, show the control points of this curve, and if you used perpcrv as I said, not polyline or line, then you should get two control points inside your curve. Move those to the right (from Front viewport) by 1.2 units.

Next, using two closed curves, and this profile curve, create connecting surface. We’ll do that using Sweep2 command.

Ok, next, using PlanarSrf command, create top and bottom caps of your base model.