[modeleng] Re: Going round the bend

Thanks Clif, and everyone else who responded.
That formula by Dennis Monk will suffice for my present needs, even though 
it is an approximation.

In fact, for anyone else who may be interested, Pierre Courbouleix sent me a 
PDF file on the subject, (thanks Pierre) and in it was a couple of useful 
links,
http://trailingedgetech.whidbey.winisp.net/TrackSpiral.aspx

http://trailingedgetech.whidbey.winisp.net/

http://www.arema.org/comm/c17/Milwaukee_22.PDF


Having read and looked at them, and as my calculus is not what it used to be 
(!!) I will stick to Dennis Monks formula!
Alan Stepney


http://www.alanstepney.info
Model Engineering & steam engine information pages

----- Original Message ----- 
From: "Clif Walker" <clif.gwr@xxxxxxxxxxxxxx>
To: <modeleng@xxxxxxxxxxxxx>
Sent: Sunday, May 29, 2005 8:40 PM
Subject: [modeleng] Re: Going round the bend


Hi Alan,

The formula for a transition curve is as follows:-

C=  the square root of (S x 2 x R)

Where C= the length of the transition in feet
           S= the shift in inches
           R= the radius of the circular curve to be entered in feet.
The minimum recommended transition length for 5" gauge is 14 feet and for
7.25" gauge 18ft 9inches.
Info taken from Dennis Monks "Making Tracks".

Regards

Clif


----- Original Message ----- 
From: "alan Stepney" <alan@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx>
To: <modeleng@xxxxxxxxxxxxx>
Sent: Sunday, May 29, 2005 10:11 AM
Subject: [modeleng] Going round the bend


> When going from a straight track to a curve, one should build in a
> transition curve, to make the change gradual rather than abrupt.
>
a table of offsets.
>
> However, there is a formula to calculate transition curves which I learned
> many years ago, and, naturally have totally forgotten.
>
> Can anyone tell me what it is?
>
>
> Alan Stepney
>
>
> http://www.alanstepney.info
> Model Engineering & steam engine information pages
>
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