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- Path: sparky!uunet!pipex!warwick!uknet!axion!djenkins
- From: djenkins@axion.bt.co.uk (David Jenkins)
- Newsgroups: rec.models.railroad
- Subject: Imitation valve gears (was model engineering newsgroup)
- Message-ID: <1993Jan21.140424@axion.bt.co.uk>
- Date: 21 Jan 93 14:04:24 GMT
- References: <1j4popINNt2r@kralizec.zeta.org.au> <ANDRE.93Jan18143304@king.slc.mentorg.com> <1993Jan19.175602.26088@twg.com> <0fOo02zi33ar01@JUTS.ccc.amdahl.com>
- Sender: news@axion.bt.co.uk
- Reply-To: djenkins@axion.bt.co.uk (David Jenkins)
- Organization: British Telecom Research Labs
- Lines: 43
-
-
- In article <0fOo02zi33ar01@JUTS.ccc.amdahl.com>,
- czl30@duts.ccc.amdahl.com (Chris Lee) writes:
- |> In article <1993Jan19.175602.26088@twg.com> nolan@twg.com writes:
- |> >
- |>
- |> This includes a lot of detail not normally found on models, like a
- |> smoke-
- |> box door which opens the proper way for this engine (two handles, one
- |> that
- |> screws to lock the other) to reveal a blast pipe, the lower part of
- |> the
- |> chimney and the boiler tubes at the back of the smokebox. We have
- |> turned
- |> a crank axle and are currently building piston and connecting rods,
- |> and
- |> Stevenson's vale motion (although we haven't worked out a way to
- |> make
- |> this reverse with the engine). Any thoughts, anybody?
- |>
-
-
- This sounds like fun! I can see a problem though, with trying to create
- an imitation Stevenson's valve gear, because a lot of the critical bits
- happened inside the frames, were I presume you've got your motor and
- gearbox. The eccentrics and rods take up most of the space between the
- frames. Would Walschearts (sp?) valve gear be out of scale? An
- imitation of this could be rigged up without too much pain, as long as
- you didn't want to reverse the gear.
-
- Alternatively, you could use just one eccentric to a crank going through
- the frames (similar to the old slip-eccentric gear) - it depends how
- much is visible.
-
- It's all right for you though - in my kind of loco (5" gauge) you have
- to make *real* and *working* gear!
-
- Good luck...
-
- David Jenkins
-
- "In times like these, it helps to recall that there have always been times
- like these." - Paul Harvey.
-