[modeleng] Re: Rails/Wheels Clearance
- From: "Ron Head" <ron.head@xxxxxxxxxxxxx>
- To: <modeleng@xxxxxxxxxxxxx>
- Date: Wed, 20 Oct 2004 22:22:42 +0100
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" <pierre.courbouleix@xxxxxxxxxx>
To: <modeleng@xxxxxxxxxxxxx>
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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