Hi thought id post some pics of the new small fan driven smoke unit i just built for my railmotor .
It uses a 50mm square ABS enclosure box.
Top photo shows all its parts layed out.
1 20 mm 12 volt fan.
A scrap piece of 6mm alluminium tube.
A small wire wound resistor .
And some fiberglass wick used in kerosene lamps .
Last photo shows the test on my watt meter it draws less than one amp on a 4 cell lithium polymer battery pack .
It cost less than 5 dollars to build.