Hi, I believe 380/ 400 there is no difference would assume 385 is the same but the tech bods with correct me if I’m range. But have a look at the posting may help https://www.modelboatmayhem.co.uk/forum/index.php?topic=11713.0
The 380 is the basic design with 3 poles, giving lots of speed but not a lot of torque. A 385 has 5 poles (hance the 5 at the end of its number) which reduces its speed, but increases torque and improved slow speed control. 400 series motors are the exact same size as 380 motors, but are later versions with the number range changed to make life simpler (allegedly) for marketing people. Usually they have more modern, more powerful magnets and "might" be better engineered. A lot can happen in the space available, but at some point everything becomes a compromise game. Thicker wire means fewer turns for more speed at the cost of more current which means bigger brushgear which there might or might not be room for with the size of armature wanted. Stuff like that.
I used to like the "Litespeed 400" run at the max voltage that was on the label for fast boats. No idea if you can still find them.
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Topic: Motors for Italeri S-100 (Read 2613 times)