Double Backgammon

by Robert W. Strickland 5/31/97

No ratings yet

L/W: 133%
Design RI: 1.54
H/W: 91%
Gear: 96
V/W³: 0.587
Symmetry: 2 (mirrored)
Facets: 74
Tiers: 23
Crown: 8
Pavilion: 66

USFG Newsletter, Vol. 7, No. 1-2, Mar-Jun. 98, p. 29

*Step 3 determines the size of the finished stone Crown based on the Backgammon Cut by Robert S. Stepp, Seattle Facetor Design, May 1991, p. 4. If step L is too shallow, cut cut using 45 deg. dop.

Wireframe

Pavilion

#	Angle	Facets
G1	90.00°	9648
G2	90.00°	12366084
G3	90.00°	2472
P1	78.00°	2472
P2	70.00°	9648
P3	52.70°	12366084
P4	48.26°	10385886
P5	46.74°	8405688
P6	43.86°	6425490
P7	43.57°	4445292
P8	42.48°	9648
P9	41.84°	2465094

Crown

#	Angle	Facets
C1	55.10°	2472
C2	54.33°	9648
C3	45.42°	22267074
C4	44.55°	12366084
C5	40.21°	19296777
C6	37.77°	2472
C7	35.37°	3455193
C8	28.69°	3455193
C9	17.62°	8405688
C10	13.00°	10385886
C11	10.04°	2472