Re: [FS32NGModelrail] Curve radius
My Wazoo Island Rwy. uses 10" radius
curves, and the Bachmann Porter mechs.
plus 4-wheel cars have NO problems with
them at all. As I recall, Charley Lix (Hi Charley!) uses 9" radius
curves on his
Excelsior Estate Rwy. (1/32 branch) He
als has no complaints. Go fer it!
- If you use Robert Hudson pattern 'semi-portable' steel sleepered
trackwork the smallest radius (type 1) was 13feet 3inches. Note that
the radius was measured to the inside face of the outer rail. Type 2
radius was 37 feet. I run a 7mm scale Ruston 'LBT' and train of six
RUGGAs round scale 13ft 3in curves without problems.
Scale drawings and templates etc (for 7mm scale) for Type 1 & 2 track
and turnouts are in the RCL Product Handbook.
Hudson 'Rugga' pattern skips will easily run on type 1 curves as they
are properly designed so to do, having nearly perfect semi-circular
ends. Provided your locos have the same overall length (or nearly so)
as the rolling stock, plus a similar wheelbase, then a train is easily
hauled or propelled around the sharpest of curves. As soon as you
deviate from this simple formulae, problems escalate.
Most steam locomotives (though not all) have unequal overhang of the
fixed wheelbase, usually to accomodate the firebox. This means the
swing outward, on curved track is greater at one end than the other,
causing buffing/coupling problems especially when the wheelbase of the
wagons is notably different to the loco. My first 'Crowsnest Tramway'
in 1/4in scale has a model of 'Excelsior' - an 0-4-2 that gave endless
problems with regard coupling at the pony truck end as the swing
outward was too great. The only possible solution is to allow the rear
coupler pocket to swing - not always possible.
Basically, choose your locos and stock very carefully if you want to
use sharp radius curves. Even Robert Hudson, who made the track,
stated their (Hunslet built) diesels locos were suited to a minimum
radius of 25ft and the ex - Kerr Stuart 'Wren' class steam loco, 35
Firms that provided equipment for building full size narrow gauge
railways worked out all of this for their customers and tried their
best to get it right. Modellers seem to adopt a more haphazard
approach (as do preserved railways) in gathering up motley collections
of ill matched stock. There are very good reasons why you don't (or
shouldn't) haul skips with a Beyer Garratt. They might be tha same
gauge but are not designed for with compatibility whatosover.
Roy C Link
- Fellows ,
>From: Mario Bernkopf <mario.bernkopf@...>our industrial narrow gauge
>12 inch radius equals 10 meters in 1:1, which is an acceptable radius for
>on the continent. I even heard rumours of twenty-feet radius on some lines.0-4-0IST steam loco
>> Tim Stolle wrote:
>> >if I can use 12 inch radius curves as my smallest radius.
>> Mike South
>> In On3 Gauge (3/4") I can comfortably get a 1/32 scale Bagnall #300
>> (with 2' 9" wheelbase and 1' 3' diameter wheels) to run round 9" radius curvesAdding my Tuppence ... I was using 9 inch radius for a "0n2'" Roundy roundy
Railway and had made four little flats with lead deck scribed to represent
wood with Grandt's spoke wheels , these four I could "PUSH" around the nine
inch curves without fail hour after hour .. I've since built one for the
1:32 nd Railway as a prototype .
>> those fine folks on the Excelsior Estate and up the Wazoo :-) :-)Ah yes , those crazies over both sides of the straight .But the've been
known to bend the rails then "See" if the Lokeys will go round .. The domo
over to Excelsior says that 9" is his minimum .. having 'spearminted " with
curves .. 8 inch radius seems too tight . and nine ....just fine ..
Have Fun - Charley
Estate Railway staff.
- Fellows ,
Radius . the 9 inch raduis curves are 48 scale feet across ..seems quite
generous .. The little prototype two footer over in Nevada county runs a
twelve ton Plymouth around a 35 foot radius curve .. regularly ...flange
oilers are installed on the Lokey .
>I run a 7mm scale Ruston 'LBT' and train of sixHave Fun - Charley
>RUGGAs round scale 13ft 3in curves without problems.
Estate Railway staff.