Franklin B rotary cam poppet valves

The translation is by Carpenter. It does not redraw the French graphs and exhibits, much as the Wasatch translation of ‘Rear Boiler Knowledge’ from Glasers Annalen does not. Among other things it contains Chapelon’s useful Sherlock Holmes deduction on how Timken thin-section rods can possibly work with roller bearings.

All the calculations were to be in ‘part 2’ of LLAV, which was never reprinted after the original edition (in French) and as I recall much of it was never printed at all. Discussion of this on steam_tech was extensive but now ‘lost to science’ with the collapse of Yahoo Groups; it remains to be seen if the archives or collateral are restored on groups.io. I recommend that you review anything remaining on the Web by Thierry Stora or Claude Bersano before it, too, gets taken down…

I was sent a page scan of the 1938 edition to do a full translation of the ‘missing’ part … and should get back on it!

GPCS is in part founded on a mistaken understanding of heat transfer in a locomotive boiler; it resembles some of the misunderstanding of the thermodynamics of Besler tubes. Effective heat release is only part of the concern; it must then be taken up effectively and then communicated to water in ways that facilitate generation of suitable ‘power steam’.

Products of combustion transparent across a wide portion of the emission spectrum are not as effective at radiant heat transfer as the luminous flame from vaporized (but unoxidized) carbon. Uptake from transparent gas is likewise peaky in the tubes; hence heating of a blackbody followed by re-radiation nearly normal to a (similarly black) tube wall has enhanced heat transfer benefits in addition to increased convective transfer in an annular restriction. In a boiler where there is no practical effort to recover the heat from the (transparent) H2O in the gas stream – in GPCS this deriving not only from combustion but the 'process