As it has been a year since I put anything on my workbench thread I will look back and see what I have been up to. First up is a Heljan 37 detailed with a DJH re-furbished conversion kit.
Been doing a bit with a Heljan class 20 as well. Added snow ploughs and painted the buffer shanks silver. The chassis is a tight fit on the chassis so whilst it was out I filed a bit off the chassis by the cab and now it goes in ok. I have removed one motor from this and another I have to see if I can run a pair without overloading the controllers!
Did a run with these single motored 20's and they ran just like single one. I had 22 wagons on and I even ran it with one loco which it seemed to cope with ok.
As the Bristol show is looming I thought I better do these flange lubricator boxes on 37425 that I had 3D printed some time ago.
There are a few .5 holes needed drilling but I still could not do all the pipe runs coming out as there just was not enough room. Think it looks the part but just wondering how well it will show when it's painted. I think some gentle weathering will be needed to highlight it.
If you took one motor out of a Class 20 would you still need an XL sound chip to run it or could it be done with a smaller cheaper chip, without loss of sound and running quality.
From memory the 20s have a quite high current draw. I suspect that the stall current will bo OK on one motor though. If you have an ohm meter the easiest way to check stall current is to read the motor resistance,I.e. just measure across the wheels. Apply ohms law to the reading. V=IR. For example, if the resistance is 6ohm and your track voltage is 12v, then the stall current is 2A.
This comes from the fact that at stall there is no back emf and dc conditions apply.
Kev