ellipse w1 0 0 0 15 10
mkedge w1 w1 0 pi
polyline w2 -15 0 0 0 -5 0 15 0 0
wire w w1 w2
mkplane w w
prism s w 2 0 10
tscale s 0 0 0 SCALE1
explode s E
mkevol result s
updatevol s_1 0 1*SCALE1 1 2*SCALE1 2 1*SCALE1
buildevol

checkprops result -s 133326