I repowered a Williams SD 45 with an ERR conversion. Every thing works great but when slowing down it stops abruptly. It seems to me that the voltage just drops out. The motors do not have flywheels. Could that be the problem?
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I think you hit the nail on the head. Without flywheels these locos stop short. Trainworld has a big Williams sale going on you may be able to get a newer sd45 for a good price. I've bought newer Williams and upgraded my older non flywheel motor ones and I'm very happy with results. Lenny J
Not sure about the age of the Williams engines that Trainworld has for sale but another online dealer has some pre-Bachmann Williams for sale, or Williams that were made when Mr. J. Williams still owned the company.
There is nothing bad about buying the older Williams before Bachmann but I just want to let people know that they might be buying five to six year old new in box left-over inventory.
If you are looking for Williams by Bachmann you will likely be paying the higher price for them verses leftover Williams.
Lee Fritz
Just a little info, there were several models of the Williams SD-45 made and many circuit boards used by Williams. First generation Williams, the Crown Edition, the Williams Reproduction, and current WBB makes of the SD-45, these are the ones I am aware of. You can't tell them apart that easy unless you have experience with Williams, so you could have one of many different circuit boards inside your SD-45.
The newer models may have flywheels but I won't say for sure.
Lee Fritz
Originally Posted by Billsrr:
I repowered a Williams SD 45 with an ERR conversion. Every thing works great but when slowing down it stops abruptly. It seems to me that the voltage just drops out. The motors do not have flywheels. Could that be the problem?
It's not a "problem", just its nature.
Wiring the motors in series will bring abrupt stops & starts more under control.
Try the momentum adjustment on the TMCC remote. That should make your stops a bit less abrupt, at least when you are operating under TMCC.
I sounds to me like your engine has the big aluminum colored can motors, and possibly a lead weight attached to the engine frame. These are well known for not coasting at all when the power is cut. Your best bet is to replace the motors with the smaller motors with fly wheels. WBB should be able to sell them to you. As an added benefit, once you have the fly wheels, you can add a timing tape and tach reader, which will give you better speed control.
Chris
LVHR
Originally Posted by lehighline:
I sounds to me like your engine has the big aluminum colored can motors, and possibly a lead weight attached to the engine frame. These are well known for not coasting at all when the power is cut. Your best bet is to replace the motors with the smaller motors with fly wheels. WBB should be able to sell them to you. As an added benefit, once you have the fly wheels, you can add a timing tape and tach reader, which will give you better speed control.
Chris
LVHR
Bingo. I have one of these from the early 1980s. Terrific locos, ran the wheels off of it as a kid (my dad loved it too because it was finally something new after so many years of re-issues) and still run it today. It will pull everything you put behind it, but it will not coast. I have learned to slow it gradually to avoid issues.
