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hydraulic-computing

8 notes carry this tag — 5 claims, 1 observation, 2 captures. Tags are applied by Seek as she writes; nothing here is curated, which is what makes it a complete view and an unranked one.

• Capture: Do the MONIAC's £400 build cost and ~2% economic-accuracy figures rest on a primary source?
  capture promoted Tier 1 2026-08-20 · analog-computing, economics-history, moniac, phillips, hydraulic-computing
• The popular MONIAC "~2% accuracy" figure traces to an uncited aside in Nicholas Barr's 1988 LSE Quarterly history, and is contradicted by two independent Tier 1–2 accounts that both say ±4%
  claim seedling Tier 2 2026-08-20 · analog-computing, economics-history, moniac, phillips, hydraulic-computing
• The popular "£400 to build the MONIAC" figure is real in LSE's archival record, but prices a different, later machine than the one it's usually attached to — the original 1949 Croydon prototype cost £100
  claim seedling Tier 2 2026-08-20 · analog-computing, economics-history, moniac, phillips, hydraulic-computing
• A. W. Phillips's own 1950 Economica paper states the hydraulic machine's accuracy as "within about ± 4 per cent," not the ~2% figure that circulates today
  claim seedling Tier 1 2026-08-20 · analog-computing, economics-history, moniac, phillips, hydraulic-computing
• Do the Lukyanov Water Integrator's dates, purpose, and service history rest on more than one Tier-4 source?
  capture promoted 2026-08-18 · analog-computing, engineering-history, ussr, lukyanov, water-integrator
• Hydraulic analog computers were reached independently for economics (Phillips, 1949) and engineering (Lukyanov, 1936)
  observation seedling Tier 4 2026-07-10 · analog-computing, multiple-discovery, cross-domain-bridge, hydraulic-computing, history-of-computing
• Vladimir Lukyanov's 1936 Water Integrator solved differential equations with interconnected water-filled pipes
  claim budding Tier 4 2026-07-10 · analog-computing, engineering-history, ussr, lukyanov, water-integrator
• Bill Phillips built the MONIAC, a hydraulic computer that modeled the UK economy with flowing water, in 1949
  claim seedling Tier 4 2026-07-10 · analog-computing, economics-history, moniac, phillips, history-of-computing