Recent content by kmccutcheon

  1. kmccutcheon

    Xt-37 Turbodyne

    Thank you for the image, Capt. Vick.
  2. kmccutcheon

    Xt-37 Turbodyne

    I have recently published an article on the Northrop Turbodyne. Few new images but much new information. Please see Northrop Turbodyne (XT37)
  3. kmccutcheon

    R2800 Master Rod locations

    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
  4. kmccutcheon

    Did Sleeve Valves Have an Advantage at Very High RPM?

    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
  5. kmccutcheon

    Allison and Merlin in a P-51

    Another wonderful reference is Hucknall - The Rolls-Royce Flight Test Establishment by David Birch, published by the Rolls-Royce Heritage Trust in 2017.
  6. kmccutcheon

    Where is the S3C3-G standing for in the engine name of Pratt & Whitney

    Please see https://www.enginehistory.org/Piston/P&W/PWdesignations.pdf
  7. kmccutcheon

    R4360, angle of the dangle...

    Please see http://www.enginehistory.org/members/images/PW_InstallationDwgs/R-4360.jpg
  8. kmccutcheon

    R4360, angle of the dangle...

    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.
  9. kmccutcheon

    R4360, angle of the dangle...

    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...
  10. kmccutcheon

    Chrysler Hemi Airplane Engine

    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...
  11. kmccutcheon

    Chrysler Hemi Airplane Engine

    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...
  12. kmccutcheon

    Pratt & Whitney R-1860-17 engines

    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
  13. kmccutcheon

    Potez 12Dc engine information

    Nothing on the 12Dc, but this on the 12D...
  14. kmccutcheon

    Engine Oil - Bristol Sleeve Valves

    Send a query to Ben Visser [email protected]
  15. kmccutcheon

    Engine Oil - Bristol Sleeve Valves

    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...
Back