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About Jerrykins

  • Rank
    Staff Sergeant

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  • Location
    East Suffolk
  • Interests
    British WW2 Softskins
  • Occupation

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  1. I am & you're correct. Put it down to it all being a little while ago!
  2. I recall the FD12 was selected for the Hunt class because it's characteristics of low vibration & low magnetic signature were necessary when sweeping above active mines. The FD12 generated electrical power at 1800 r/min, which equates to 360 firing cycles per second, vibration was further minimised by mounting the gen set on a raft with two sets of mounts transmitting little vibration to the hull/sea. Three gen sets were mounted in the hull above sea level further reducing noise transmitted into the water. The crankcase was cast in non-magnetic aluminium, as were many of the auxiliary casings, stainless steel conn rods & c/shafts etc all adding to low magnetic signature. Part way through development Foden decided the work was not for them & the MoD transferred the work to R-R Crewe, presumably because R-R had considerable experience of 2 strokes with the K60, which had proven to be the best 2 stroke in UK military service. When sweeping the ship employed electric only propulsion making the ship was pretty stealthy, noise-wise. It was during the Iraq / Iran war that the Hunt class cleared the passage of mines into Kuwaiti waters for the allies, they did the job well without loss, they were the best ship available to do the job.
  3. For info, the Hunt class were built as MCMV (mine counter measures vessels), the propulsion engines - Deltics & the gen sets - Foden FD12 2-strokes were built to challenging low magnetic specs utilising stainless steel conrods, crankshafts & other components. In service they proved to be very expensive to maintain as a result of the exotic materials employed. The Hunt class strategic requirement is now a Mine hunter &/or Fishery protection vessels, which no longer require a very low magnetic build. In addition degauzing methods have improved, so all the original engines were replaced with conventional designs, which are cheaper to purchase, less costly to maintain & much longer lived. They might have retained the Deltic pulse generators, I'm a bit out of touch now.
  4. Back in the '60's there was a Junkers wartime opposed piston aero engine in the K1 area of the R-R factory at Crewe, where the K60 was manufactured.
  5. Swiss application is more likely Swedish. R-R supplied circa 300 x K60 for the Swedish S tank....
  6. Jerrykins

    New Format

    I quite agree this 'improvement' is retrograde. It is great shame. The old adage of if it ain't broke don't fix it applies here. Jerry
  7. Splendid vehicle Kevin we'll miss Queenie, I'm sure she'll sell in a trice. Best Jerry
  8. You're right Adrian, there goes another senior moment... The toolbox looks & fitted great - thanks. Best. Jerry
  9. Mike & Sam - many thanks for the useful tips. Best. Jerry
  10. Mike We've got the manuals, which we've read. Thanks for the re assurance that it's as straight forward as it says. No tricks or nasties. You know what we're going to be doing tomorrow... Thanks again - Jerry
  11. Can some kind person tell me how the 'Lite' clutch is adjusted? It appears to have a bl..dy great central coned coil spring providing the engagement and a sort of lever plate within to disengage the friction plate. There are adjustment shims to increase the spring tension and the clutch pedal linkage needs careful adjustment. Any advise in getting the best from this set up will be gratefully appreciated as the clutch is starting to slip. Thanks Jerry
  12. Many thanks Ian & Runflat. I'll be following up your recommendations. Best. Jerry
  13. The speedo cable has just failed on my C4, the inner cable failed at the speedo head as the chronometric speedo failed on the way home from an event on Thursday. Thankfully the inner cable can be removed easily. Does anyone have a spare cable or any advise on a source for a replacement. Jerry
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