David Kruschke

American designer and teacher (of Wild Rose, Wisconsin) who wrote, hand-lettered, and self-published the Dome Cookbook of Geodesic Geometry (2nd edition, 1975).

Kruschke's booklet derives the chord factors and dihedral angles of geodesic domes from first principles of plane and spherical trigonometry, deliberately avoiding jargon and coordinates so an owner-builder can follow it with "pencils, paper and trig. tables." Its distinguishing achievement is a 3-frequency dome whose ground-level vertices are all coplanar — a truncatable dome that sits flat on the ground, in close agreement with Fuller's figures and praised by The American Mathematical Monthly and Lloyd Kahn.

Role in Fuller's orbit

Kruschke is a builder-mathematician in the countercultural dome movement — the author who most carefully closed the gap between owner-builder practice and Fuller's underlying geometry, getting the hard 3-frequency case right.

See Also

• Dome Cookbook of Geodesic Geometry (Dome Cookbook of Geodesic Geometry) — the workbook he wrote
• Joseph Clinton (Joseph Clinton) — fellow geodesic mathematician whose figures Kruschke's work agrees with
• Steve Baer (Steve Baer) — dome-movement contemporary (whose own book is also titled a "Dome Cookbook")

Sources

• Dome Cookbook of Geodesic Geometry (source reference) — the work attributing authorship