A representation of a Hudson Tipper truck for a G scale railway.
This is the revised version(April 2014).
The photo shows a rake of three with an LGB Stainz on 45mm track (one painted red, one "raw" white and one "raw" black").
Inspired to try this by http://www.thingiverse.com/thing:160987.
(June) Revised the hub again (revised lowered hub.stl).
This one lowers the frame by 2mm, making better coupling with standard lgb train. This hub still snaps on to the "revised frame", and uses the "Mk 2" wheels that fit 45mm gauge track better.
There is a "revised hook f", that allows the tippers to couple, (simple chain looks better but is hard to get at).
I used 3mm rod for the axle.(from a wire coat hanger suitably straightened). The height of wheel etc with this new hub means that the body is the correct height to work with LGB hook connectors.
I have left the old tub stl and master 123dx files in case anyone wants the original versions.
May 2015 I have added Stefan's Hubs to the files.(see http://www.thingiverse.com/make:125279) Thanks Stefan!.
The body is made "upright", and printed well. Some minor stringing under the horizontal was seen.
Wheels printed well as a set of four. They adhere well and do not need a raft or brim.
The new "Hub" stl is tilted to help printing as a set of four when printed on a raft, otherwise they lift during printing.
The dumper body was printed upside down, using the "raft" option in CURA software.
The toy like hook allows the tippers to connect to each other or LGB trains. I have not tested the decoupler with any decoupling rails but it is roughly the same height as LGB decouplers. It can be fitted by holding the hook and pushing the decoupler "up" into the frame and rotating to "hook" its hole onto the frame pin. This is best done before the tipper is fitted. Some filing may be necessary for best operation.
The axles are 3mm galvanized steel, (thick wire coat-hangers have 3mm diameter and seem to work ok) and the holes in the axle boxes are 4 mm dia to allow brass axle sleeves made of 4mm * 0.5mm wall tubing if required. The wheels should be pushed outwards to just touch the hubs, then the wheels are correctly dimensioned for 45mm (LGB) track. They will require gluing to hold them securely, or a spacer must be made to hold them apart the right distance. I have also used 2.9mm brass rod.