Roy,
Can you suggest to me a s newbie a min-max other than 12.40-12.50 that you feel would have wider applicability to O14?
Many thanks
Gary
Gary Shearn
Marlborough | SN8 1PA
Dear All,
Re the proposed back to back gauge being proposed. Note that the min-max of 12.40 to 12.50mm applies ONLY if you have the matching wheel profile - which is that proposed by the BRMSB as ¡®EM¡¯ in 1950. This profile was used by
Alan Gibson and MayGib and sold by them as ¡®fine scale OO¡¯ during the time I was developing and producing my range of O14 kits. I took wheels from both, the loco tyres coming from Alan and those used in the rolling stock from Ken Pelham at ?MayGib. I moulded
my own centres in polypropylene - the rolling stock axles were purchased jointly with Alan Gibson in batches of 20,000 (split two ways). Alan sold them for ¡® TT fine scale¡¯.
Use of any other wheel profile will cause varying problems - good tracking is only assured if standards are kept to quite strictly - particularly on locos with more than two axles. Mixing profiles, especially those un-published
is risky.
My standards were the result of practical experiment - based on the old BRMSB measurements and logic. They allowed perfect tracking of small four wheel locos and wagons around sharp radius curves without derailment, either
pulled or propelled. A long time ago I did propose that, for models of larger two-foot gauge prototypes, it would be better to adopt modified NMRA ¡®Sn3¡¯ standards - which are more sophisticated than those of the BRMSB - which were more guidelines.
Roy C Link
Tel:01766 530784
Thank you every one who has asked for one.
Currently up to 28 units. ?I might round it up to 30 and sell a couple on the Narrow Gauge online forum.
Closer to when they are produced I will ask everyone to email me personally with confirmation of order and address details.
Thanks for all the interest so far.
I will update on Monday when I have spoken to Malcolm on Sunday at the O gauge show in Bristol, with any luck a slightly better price, no promises!
Regards?
James?
?
Hi James,
Could you please put me down for two back to back gauges.
One of them is for a friend.
I¡¯m in Australia.
Regards,
Grant McAdam
?
?
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G Shearn