[NorthwestGarrattGuy]

Sorry -this should help! Just cut and paste the source code into CURA (with the open,SCAD plugin)
-------------------------------------------------------------------------------------------------

//axle securing block
//smemotormount

difference()
{
cube([33,20,7]);
{
translate([0,0,3.5])
{
rotate([0,90,0])
{
cylinder(40,3.5,3.5);
}
}
}
}
//END

----------------------------------------------------------------------------------------------------------------
And the OU part
----------------------------------------------------------------------------------------------------------------

//wonder engine SME motor mount
//12Tmod0.5 on motor
//90Tmod0.5 on wheel

//faceplate
difference()
{
cylinder(3,17,17);
{
cylinder(4,5,5);
translate([7,0,0])
{
cylinder(4,2,2);
}
translate([-7,0,0])
{
cylinder(4,2,2);
}
translate([0,7,0])
{
cylinder(4,1.5,1.5);
}
translate([0,-7,0])
{
cylinder(4,1.5,1.5);
}
}
}

//holding tube
translate([0,0,3])
{
difference()
{
cylinder(30,17,17);
translate([0,0,3])
{
cylinder(34,14,14);
}
}
}

//axle U
difference()
{
translate([25.5,0,0])
{
cylinder(33,11,11);
}
{
translate([25.5,0,-2])
{
cylinder(40,3.5,3.5);
}
translate([22,0,-2])
{
cube([7,20,40]);
}
}
}

translate([29,0,0])
{
cube([5,15,33]);
}
translate([17,0,0])
{
cube([5,15,33]);
}

//damper fitting
difference()
{
translate([13,5,0])
{
cube([9,23,10]);
}
translate([18,22,-5])
{
cylinder(20,1.5,1.5);
}
}
//END
-----------------------------------------------------------------------------------------------------
The motor I use is 25mm dia and has a 2.3mm shaft. By altering the raw dimensions you can adapt this to fit any motor. The axle shaft can be either 6mm (a common hear bore) or 6.4mm (Slaters wheels). The 90TMOD0.5 gear is a perfect fit for a BR 3 feet 9 inches diesel wheel at 1:22.6.

regards

ralph

the new plan is to have a series of worm gears drive the 4 axle trucks connected to a standard DC motor in each bonnet and all the black parts will likely be printed in PETG while the orange parts will be ABS though i imagen this will take at least a week to print and assemble probably more

 

[du-bousquetaire]

Hey Ralph : I think that the ideal power unit for this loco would be to use the Fosmotors Which you can get from Fosworks at : [email protected]
This little unit has a wheel set geared to a nose supended motor and is self contained, thus very easy to install, depending on the power requirement that you have you could use just a few if what you want is the engine to move by itself, or motorise all axles or a fraction of them depending on your power requirements. I understand that it is a fairly mild power unit but on such an engine you could just multiply as you wish and the installation would be a sinch. I knew about this being member of G1MRA where he advertises since ages. usual disclaimer. This locomotive is a very interesting prototype to model. Another solution would be to try a real gearless drive if you can find suitable motors with less than 40mm length and an axle on both ends. This would be more prototypical but, I fear that the speed at which the motors turn would be to great. On my SNCF 2D2 910O I could not use real Büchli transmition as, for one I wouldn't be good enough of a mechanic to do one, but two, I was afraid that it would be too fragile for the great outdoor. A it turns out it has over 20 years of fairly intense running and is still going strong.
Keep us posted on your progress. cheers, Simon

 

[NorthwestGarrattGuy]

this is the gear train it uses bevel and worm gears

 

[leikec]

Looks like a neat project!

Jeff C

 

[NorthwestGarrattGuy]

Looks like a neat project!

Jeff C

this projected has been postponed in favor of another less complex project

 

[du-bousquetaire]

Really too bad its a fascianting one.