Hi Brian
Thanks - the conical spring idea is intriguing. Am I right to assume that the narrow end of the spring is centred on and attached to the loco frames, with the truck bolster moving laterally under the wide end of the spring?
Putting in see-saw compensation would be ideal, but unfortunately the frames, etc. were all built rigid when I started construction of the loco back in 2001(!). As it was the first etched brass loco I'd ever attempted, I kept things simple (crude would be a better description). Still, all part of the learning curve....So, thanks for the offer of etching components, but for now I'm stuck with the original arrangement.
Allan
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On 28 Jul 2018, at 21:45, Brian <
rallim56@...> wrote:
Allan,
I have done this on a number of different loco's over the years, there are
several ways of doing this, the simplest way is to do it is to use a conical
shaped spring, that way it not only applies a down force but also creates a
sideways resistance.
I don't know how much room you have to play with but one possible spring
might be this one:-
<>
Another way of doing it is to set up all 5 axles so they have “see-saw”
arms between each axle meaning all 5 axles carry the weight of the loco, and
then have horizontally mounted straight compression springs to control the side
movement.
Let me know what you want I can probably photo etch some components to make
it all work how it should.
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Brian
Rawbelle County Workshops
Qld. Aust.
-----Original Message-----
From: Allan Dare
Sent: Sunday, July 29, 2018 1:56 AM
Subject: [o14] Loco suspension
?
I'm just finishing off an Alan Gibson kit for an L&B 2-6-2t. (I
purchased it from Alan's stand at NEC Warley in 2001, which may be some kind of
record for slow work!).
Anyway, given the short coupled wheelbase and long overhangs on the Lynton
locos, it would be nice to incorporate some form of side control on the front
and rear trucks, so that they do their real-life job of helping steer the loco
into curves. However, my initial efforts have merely succeeded in lifting the
lead truck's inside wheel off the rail on curves.
Has anyone developed a satisfactory form of pony truck side control for the
larger n.g. locos, or is this best consigned to the "too difficult" file?
Allan
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Allan Dare