R-2800 A and B series engines had master rods in cylinders 8 and 13. R-2800 C, D, and E series engines had master rods in cylinders 8 and 9. An in-depth discussion of this appears in the "No Short Days" article at Piston Engines
One must bear in mind that the sleeves are quite heavy. In the aircraft engines I have studied their weight varies from 10 to 15 lb. That is a lot of reciprocating mass whose inertial forces must be borne by the drive train.
American Sleeve-Valve Aircraft Engines
Another wonderful reference is Hucknall - The Rolls-Royce Flight Test Establishment by David Birch, published by the Rolls-Royce Heritage Trust in 2017.
Looking good!
By the way, in historical accuracy, it is R DASH 4360 (R-4360). A hundred years from now the dash will be important, even if Google omits it.
That works for two-row radials; this is a four-row, which means:
(360 / 7) / 4 = 12.857142° cylinder angular difference from row-to-row.
The crankshaft throws are also rotated to compensate for the cylinder rotation, with each successive throw, aft to fore, being 192.857142° clockwise from the...
Correct. The XP-47H was nothing but a test bed for the engine. There was little-to-no refinement of the cooling system, cowling, etc. Hence, cooling drag was high. It is counter-intuitive that more air is required to cool a liquid-cooled engine than an air-cooled one. The inlets, outlets...
That number was wistful thinking that developed into an urban legend. In my book Chrysler Aircraft Engines I explore the actual flight reports in detail and and relate extensive interviews with the engineer who oversaw the flight test program. On page 141, I summarize as follows:
"2. The...
The R-1860 was a single-row nine-cylinder engine and was called the Hornet B. The -11 had a 630 hp takeoff rating and a 600 hp normal rating. Please see page D9 of
http://www.enginehistory.org/Piston/P&W/R-1690/Hornet.pdf
The following manual excerpts may be helpful:
From Centaurus 661 Maintenance Manual dated Jul 1950
From Hercules 730 Maintenance Manual dated Jun 1952
From Hercules 264 Maintenance Manual dated Feb 1968
Looks as if there are still numerous oil choices for persons operating sleeve-valve...