Hey Folks, Designed and constructed in 2016-2019 as a companion project to the Antikythera mechanism, this video series is an alternative look at the second oldest geared mechanism from antiquity: The Byzantine (London) Sundial-Calendar. I designed the project as a sort of 'gateway' project into more complex horological work, especially if you're already comfortable with model engineering, and maybe feel like tackling something a little unusual. I've seen some outstanding builds of this project over the intervening years and would love to see more. So, if you'd like to build along with the series and help me make these videos, the plans for the project are available as part of the $1 tier on Patreon, find out more here: https://www.patreon.com/clickspring/about Those of you who are Patrons will notice that for this YouTube release of the series I've spruced up the intro card and soundtrack, and also combined a few episodes together to make it all a bit more efficient for the viewer. For those who are seeing this narrated build series for the first time, do please enjoy! Cheers. Chris. ________________________________________________________ A very special thank you to Patrons: Sinking Valley Woodworks Glenn Trewitt Christopher Warnock Guy Loughridge Charles Frodsham & Co. Peter John Richardson Adam Slagle Robin Haerens Mitchell Collins L'Enfant Watch Company C. A. Patrick Voigt Steven R. Crider Gary Levario Mark Coburn Pete Askew Jeff Armstrong Ralph McCoy Jim Popwell Kaedenn Bradley Pirtle PaxAndromeda Thomas Eriksen Michael Hardel Tim Ball Grant Michener Jonathan Teegarden Steve Hossner RuKiddin06 John Maksim RobinP556 Lea Bruder Armagus John S Dilsaver matt mcparland Daniel Cohen Larry Pardi Sean Kuyper Samuel Irons Dan Keen Florian Ragwitz Matthew Middleton ________________________________________________________ References: Original Artefact: https://collection.sciencemuseumgroup.org.uk/objects/co1082/byzantine-sundial-calendar-sundial-perpetual-calendar Michael T. Wright (curator): https://en.wikipedia.org/wiki/Michael_T._Wright_(curator) J.V. Field & M.T. Wright, “Gears from the Byzantines: a Portable Sundial with Calendrical Gearing”, Annals of Science, 42 (1985), pp. 87 – 138. D.R. Hill, “Al-Bīrūnī’s Mechanical Calendar”, Annals of Science, 42 (1985), pp.139 – 163. J.V. Field, “Some Roman and Byzantine Portable Sundials and the London Sundial-Calendar”, History of Technology, 12 (1990), pp. 103 – 135. M.T. Wright, “Rational and Irrational Reconstruction: the London Sundial-Calendar and the Early History of Geared Mechanisms”, History of Technology, 12 (1990), pp.65 – 102. You can also help me make these videos by purchasing via the following Amazon Affiliate links: Cameras: Panasonic GH5 - https://amzn.to/2rEzhh2 Panasonic X920 - https://amzn.to/2wzxxdT Books: "Solidworks 2013 Bible": http://amzn.to/2FObS1D "Machinery's handbook": http://amzn.to/2pi7XE5 "Lathework: A Complete Course (Workshop Practice Series)" - https://amzn.to/3Zt1DJM "Drills, Taps and Dies", Tubal Cain: https://amzn.to/4c0e5H0 "Hardening, Tempering & Heat Treatment", Tubal Cain: http://amzn.to/2IdTQLw Tools & Shop Products: Sherline Lathe: http://amzn.to/2pnXM19 Sherline WW collets: http://amzn.to/2FYZ7F8 Optivisor Headband Magnifier: http://amzn.to/2HFg1FU Norton 1-by-2-by-8-Inch Fine/Coarse India Combination Oilstone, Red: http://amzn.to/2tTEPb0 Digital Caliper 6 inch/150 mm Electronic Vernier Calipers: https://amzn.to/48Ofcac Interapid Dial Test Indicator: http://amzn.to/2FPInwH Saint Gobain (Norton) - 4 Arkansas Stones + case: http://amzn.to/2HCOAMX Dormer A190202 Jobber Drill Set, 1.0 mm - 6.0 mm x 0.1 mm Size: https://amzn.to/2DR5fdb Dormer A190203 Jobber Drill Set, 6.0 mm - 10.0 mm x 0.1 mm Size: https://amzn.to/2ITfeTa Heavy Duty Arbor Press: - https://amzn.to/46HdTZV Geevorks Spotting Drill Bit, M42 HSS High Speed Steel Drill Bit Set,7PCS 90 Degree Drilling Chamfering Tool - 3 4 5 6 8 10 12mm: https://amzn.to/48KiTO5 Magnetic Base Adjustable Metal Test Indicator Holder Digital Level 14" - Tool Stand: https://amzn.to/2PkyoTV Proxxon 37172 Micro Band Saw MBS/E: https://amzn.to/2ONORR1 Anytime Tools Angle Block Set 1°, 2°, 3°, 4°, 5°, 10°, 15°, 20°, 25°, 30° Precision +/- 20 Seconds, Machinist Tool, 10 Piece Set: https://amzn.to/2QFqM2Y Consumables: Dykem 80300 Steel Blue Layout Fluid: https://amzn.to/3LvNAO8 Bergeon Professional Cleaning Rodico: https://amzn.to/3LyKKb3 Dialux Metal Polishing Compound White and Grey 4oz 1/4b: https://amzn.to/3vopCPo Blue Matador Abrasive Paper: https://amzn.to/3PRnQhJ Moebius Multi-Purpose Lubricating High Grade Swiss Oil: https://amzn.to/3PNNK5M General Purpose Latex Finger Cots: https://amzn.to/3ZsYrhi Proxxon 28174 Band saw blade for MBS/E Swedish steel, fine (24 TPI), Silver|Silver metallic: https://amzn.to/3RzIV1l