surface faces set to back render dark in GE

to view face status use: View Menu > Rendering > Monochrome




dwgB shows 2 faces set to back, dwgA shows no reversed faces

to change the blue surfaces to front: right click surface > reverse

you can change surface face status color: Window Menu > Model Info > Colors





arcs: draw the rectangle with a vertical line as shown in the above image




setup arc
draw a 2nd rectangle from top of vertical line (point A) to point B

draw a line 2" down from midpoint at top of vertical rectangle

draw arc from ptA to top of vertical line of ptB using end of 2' line to set arc bow

copy/move arc down 8"







multiple delete hold down del key and click all lines not needed
use push/pull tool on surface of arc to set width