[modeleng] Re: Rails/Wheels Clearance
- From: Pcx <pierre.courbouleix@xxxxxxxxxx>
- To: modeleng@xxxxxxxxxxxxx
- Date: Thu, 21 Oct 2004 00:15:54 +0200 (CEST)
Hi again Ron,
Thank you for your reply, it's exactly what I needed. I know (now) how to
calculate this clearance. No need to convert inches to mm as I am fluent with
both systems ( this may sound strange for a french!)
Kind regards
PIerre
> Message du 20/10/04 23:22
> De : "Ron Head"
> A : modeleng@xxxxxxxxxxxxx
> Copie à :
> Objet : [modeleng] Re: Rails/Wheels Clearance
> Hi again Pierre
>
> Well I can only advise on 5" gauge but I will attempt to answer your
> question. It is not possible to give an exact figure for flange-to-rail
> clearance, because the side flank of the flange facing the rail is tapered
> (usually at 20 degrees), and it has a root radius where it meets the tread.
> So what follows is an approximation.
>
> The back-to-back dimension between the flanges is usually 4.11/16" (you may
> also see 4.5/8" on older designs). The radius of the tip of the flange is
> usually 3/64", so the dimension across the tips of the flanges, where the
> radius meets the flank, is 4.11/16 plus (approximately) 4 x 3/64" = 4.7/8".
> In other words, there is a nominal 1/16" clearance each side at this point.
>
> On curves, it is common to widen the track gauge by 1/32" to 1/16" depending
> on the radius.
>
> Sorry I haven't converted the figures to millimetres for you, but I hope
> this information is of some use.
>
> Regards
> Ron Head
>
>
> ----- Original Message -----
> From: "Pcx"
> To:
> Sent: Wednesday, October 20, 2004 9:09 PM
> Subject: [modeleng] Re: Rails/Wheels Clearance
>
>
> > Hi Allen, Hi Ron
> > I'm talking about 3 1/2 and 5 " gauges only! 7 1/2 is a dream I can't
> > afford !!!
> > Thanks for your kind replies
> > Pierre
> >
> >
> >> Message du 20/10/04 21:35
> >> De : "Ron Head"
> >> A : modeleng@xxxxxxxxxxxxx
> >> Copie à :
> >> Objet : [modeleng] Re: Rails/Wheels Clearance
> >> Hi Pierre
> >>
> >> What gauge are you talking about?
> >>
> >> Regards
> >> Ron Head
> >>
> >> ----- Original Message -----
> >> From: "Pcx"
> >> To:
> >> Sent: Tuesday, October 19, 2004 8:39 PM
> >> Subject: [modeleng] Re: Rails/Wheels Clearance
> >>
> >>
> >> > Hi LIst,
> >> > Our tracks are defined by the gauges and we have a well established
> >> > standard for the wheels but what is the clearance between wheels/rails
> >> > for
> >> > each gauge in order to have a good, smooth running? Is it different for
> >> > a
> >> > straight/curved portion of a track?
> >> > That's all for today. Thanks.
> >> > Pierre
> >> > pierre.courbouleix@xxxxxxxxxx
> >> >
>
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