Hi all
I would like to build some turnouts to the aforementioned 9FS standards but I am not completely clear of the correct gauge sizing. I read above that Finetrax uses asymmetric flangeways that do not seem to be an option in Templot. My goal is to achieve the equivalent of OO-SF but in N gauge using code 40 rail. Any help with the below questions would be appreciated:-
1) What are the flangeway sizes for 9FS in Templot?
2) Does anyone sell the appropriate gauges or will I need to get some made?
Thanks
Chris
@Chris Noble
Hi Chris,
Welcome to Templot Club.
I'm afraid I am well out of my comfort zone on this -- my knowledge of N gauge is nil, as is evident from the previous discussion.
Always the first question before track dimensions can be discussed is what
wheels do you want to use?
The idea of
9FS (0.5mm flangeways) is to use the
2mm Association finescale wheels on
9mm gauge (instead of their usual 9.42mm gauge), with the back-to-back adjusted to suit.
9FS won't work with commercial N gauge RTR wheels. The wheel flanges won't fit in the flangeway gap.
For some discussion about creating finer track standards using N gauge RTR wheels, see these topics:
https://85a.uk/templot/club/index.php?threads/n-sf.42
https://85a.uk/templot/archive/topics/topic_1334.php
From which I suggested (but haven't tried):
TG track gauge: 9.0mm MIN.
CG check gauge: 8.25mm MIN.
CS check span: 7.5mm MAX.
CF crossing flangeway gap 0.75mm MIN.
BB wheels back to back: 7.60mm MIN.
BEF wheels back to effective flange: 8.25mm MAX.
To avoid modifying the back-to-back, i.e. to create the equivalent of 00-SF using RTR wheels unmodified, you would need to reduce all those dimensions by 0.2mm, i.e.
TG track gauge: 8.8mm MIN.
CG check gauge: 8.05mm MIN.
CS check span: 7.3mm MAX.
CF crossing flangeway gap 0.75mm MIN.
BB wheels back to back: 7.40mm MIN. (as MOROP)
BEF wheels back to effective flange: 8.05mm MAX.
See also:
https://www.rmweb.co.uk/forums/topi...ointwork-in-n/?do=findComment&comment=3034603
https://85a.uk/templot/archive/topics/topic_2684.php
cheers,
Martin.