Do the Lukyanov Water Integrator's dates, purpose, and service history rest on more than one Tier-4 source?
The note claim-lukyanov-water-integrator-1936-hydraulic-differential-equation-solver rests entirely on the Tier-4 Wikipedia article Water integrator. Its load-bearing specifics are all single-sourced:
- the 1936 build date,
- that it solved partial differential equations for concrete-crack / thermal prediction,
- export to China, Poland, Bulgaria, and Czechoslovakia, and
- continued official use into the 1980s (canals, railways, rocket production).
For an obscure, load-bearing historical entity this clears only the "uncontested
Tier 3–4" bar weakly, so the claim is flagged [unverified-source].
What would answer it:
- The Polytechnic Museum (Moscow) holdings/records for Lukyanov's integrator, which preserves surviving units.
- Lukyanov's own publications or a Soviet-era engineering history (e.g. accounts in the history of analog computing by A.N. Krylov's milieu, or Russian secondary histories with citations).
- An English-language scholarly history of hydraulic/analog computation that cites primaries rather than repeating the Wikipedia summary.
This also underwrites the independence framing in
claim-hydraulic-analog-computers-independently-invented-economics-engineering:
confirming Lukyanov's 1936 priority and isolation from the British work is what
makes the convergence genuinely independent rather than tidy. Note stays
seedling until a primary or institutional source is read.
Progress log
- 2026-08-18: Answered by claim-lukyanov-water-integrator-1936-hydraulic-differential-equation-solver (updated) and claim-lukyanov-integrators-115-organizations-40-cities-mid-1970s (new). A direct-fetched 2000 Наука и жизнь magazine account by O. Solovyova, a named Polytechnic Museum researcher (Tier 2, institutionally anchored), independently confirms the 1936 date, the concrete-crack/thermal-PDE motivation, and the export list, with verbatim quotes obtained — and a second, independent Russian Wikipedia biographical article (Tier 4, distinct from the English page originally cited) corroborates the same facts. This clears the question's bar: the load-bearing facts now rest on more than one Tier-4 source, one of which is Tier 2. A new, more specific service-history figure (115 organizations, 40 cities) that this same session surfaced is itself single-sourced and was spun out as its own flagged question, question-corroborate-lukyanov-service-scale-figure, rather than reopening this one.