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Hermod's Recent Activity

  1. Hermod replied to the thread Compounds ex time machine thread.

    The needs of railways was always less mass of train doing more work for less fuel. Is valid today even on mainline steam excursions. The Webb three cylinder Compound scheme could have made all british steam 12% ligther and 12%more frugal. The...

    Jan 17, 2018 at 3:56 AM
  2. Hermod replied to the thread Compounds ex time machine thread.

    Present 9F has two 20 inch outside cylindes sitting 6 feet 8 apart. If I put two 15 inch cylindes 6 feet ten apart my Krauss coupled axle can move one inch either way before crosshead-crankpin collision. Cylinder group will still be three inch...

    Jan 16, 2018 at 1:12 PM
  3. Hermod replied to the thread Compounds ex time machine thread.

    Just to finish this Webb phantasy journey. A 9F with two 15 times 28 outside high pressure cylinders will allow fitment of a Krauss Helmholtz truck and an inside 30 times 28 low pressure will allow very good economy and much less footplate...

    Jan 15, 2018 at 7:14 PM
  4. Hermod replied to the thread Compounds ex time machine thread.

    The Bulleid MNs were rebuilt after the Crewkerne incident. If we asume the ratio of starting tractive effort to adhesive weigth on Webbs A 0-8-0 class was OK,we can use that as a model for an alternative three cylinder MN rebuild. Strokes were...

    Jan 14, 2018 at 7:16 PM
  5. Hermod replied to the thread Current and Proposed New-Builds.

    Moved to Compound thread.Sorry

    Jan 12, 2018 at 4:41 PM
  6. Hermod replied to the thread Compounds ex time machine thread.

    Not knowing the numbers ,but if half the heritage buisness is on 2 and a half feet or less,it could be fun to have a two-cylinder compound version of the Darjeling Himaleya B-class. There is already a simple/ original in England. Comparison and...

    Jan 12, 2018 at 4:40 PM
  7. Hermod replied to the thread Current and Proposed New-Builds.

    Not knowing the numbers ,but if half the heritage buisness is on 2 and a half feet or less,it could be fun to have a two-cylinder compound version of the Darjeling Himaleya B-class. There is already a simple/ original in England. Comparison and...

    Jan 12, 2018 at 3:31 PM
  8. Hermod replied to the thread Gresley Valve Gear - non-LNER.

    The German G12s remaining in DDR were reconstructed in the fifties and became br 58.30 .The conjugated valve gear had been a PITA since 1917. After a short time out of repair shop it gave uneven events and was reconstructed into three Walscharts...

    Jan 11, 2018