[modeleng] Re: My latest model .... and the Triple
- From: Allen Messer <al_messer@xxxxxxxxx>
- To: modeleng@xxxxxxxxxxxxx
- Date: Wed, 15 Dec 2004 13:57:09 -0800 (PST)
How about the lathes used to turn the barrels for
ships such as HMS King George class? They probably
had the length but not the swing to do a crankshapt
like this.
Al Messer
--- alanjstepney <alan@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx>
wrote:
> I have a picture (somewhere) in a very old book
> showing a lathe some 60 odd
> foot long, with a faceplate of, something around 12
> ft diameter.
> From memory, the fastest speed was under 10 rpm.
>
> I would guess that the crankshaft was turned, but my
> ML7 wouldn't help!
> alan@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
>
> www.alanstepney.info
> Model Engineering, Steam Engine, and Railway
> technical pages.
>
>
> ----- Original Message -----
> From: "Harry Wade" <hww@xxxxxxxx>
> To: <modeleng@xxxxxxxxxxxxx>
> Sent: Wednesday, December 15, 2004 4:06 PM
> Subject: [modeleng] Re: My latest model .... and the
> Triple
>
>
> At 09:02 AM 12/15/04 -0600, you wrote:
> >>A scale model of it would be fascinating.
>
> The thing that strikes me immediately about
> that engine is the
> machining diffculties, not in modeling it but in
> full size, and the
> crankshaft in particular. How was the crank made?
> Forged? Cast? Is it
> made in one piece or in interlocking sections? How
> was it turned? Or was
> it turned? If it was turned, at what rpm would a
> 300ton multiple-centered
> crankshaft be turned and who would be bold enough to
> stand nearby with that
> much weight rotating eccentrically. Inquiring
> minds, etc, etc.
> With respect to Stuarts, I was a Stuart dealer
> for a few years, which
> I discontinued because the prices slowed sales to a
> crawl not detectable to
> the human eye, but IHMO they don't have a calculated
> "all the traffic will
> bear and then some" attitude. As most of you know
> for some years Stuarts
> has been owned by an industrial corporation and it's
> my guess that a
> certain level of profitable performance is expected
> from the Stuart
> "division" and that performance will be met,
> regardless of what it does to
> the consumer price. I'm sure they do what they can
> to contain costs, but
> profitability must be maintained so as the costs for
> kitting the engines
> rise the increase is passed along to the consumer.
>
> Regards,
> Harry
>
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