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Hermod's Recent Activity

  1. Hermod replied to the thread Surge force.

    The austerity locomotives had no surge balance so if some of the regular crew can tell us at what speed they become intolerable for normal humans (non heroes) we can judge where limit is as mass of pistons must be more or less like 9Fs...

    Sep 24, 2017 at 4:59 PM
  2. Hermod posted a new thread.

    Surge force

    In my dirty and unpaid job of making a design for a future mainlineable and usefull and environmementally sound tourist locomotive I have come in doubt. Cox state that a 9f gives 6.77 tons hammerblow at 5 rps. It is 40% balanced. Surging is thus...

    Forum: Steam Traction

    Sep 24, 2017 at 1:54 PM
  3. Hermod replied to the thread Proposed New-Builds.

    Very,very true. If I could buy a P2 copy in 3D CAD,the world would be nicer without that damned Paint programe. https://i.imgur.com/KgVwSm2.jpg

    Sep 23, 2017 at 9:30 AM
  4. Hermod replied to the thread Proposed New-Builds.

    Mr Riddles dreamed as old man of having made the Clan class as Caprotti 4-8-0 and thus having beaten mr Chapelon. LNER could have done before war and would have looked much better https://imgur.com/mv7Jp6V

    Sep 20, 2017 at 9:12 AM
  5. Hermod replied to the thread Proposed New-Builds.

    The Q1 ran 75 mph backwards with mr Bulleid on board. Flawed valve gear?

    Sep 20, 2017 at 9:07 AM
  6. Hermod replied to the thread Proposed New-Builds.

    It is not very likely that an high power high speed rigid frame six coupler was a solution in 1989.Powered bogies had been tried and found usefull elsewhere.

    Sep 18, 2017
  7. Hermod replied to the thread Proposed New-Builds.

    One good point front wheel driving is that cylinders can be closer to midplane as conrods sits inside coupling rods.That was the reason that LMS compounds could have 22 inch LP-cylinders outside. It was mentioned that some of the restored GWR...

    Sep 18, 2017
  8. Hermod replied to the thread Proposed New-Builds.

    A better and better looking A2/2? http://www.rmweb.co.uk/community/uploads/monthly_09_2017/post-898-0-40142800-1505684845_thumb.jpg

    Sep 18, 2017