Two different motors in one loco!

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Ironduke
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Re: Two different motors in one loco!

Postby Ironduke » Wed Apr 21, 2021 10:48 pm

RobLeighton wrote:Here's a photo - if it's a Frankenstein job it's a very good one, the bogie plastics seem to match!


It's a miracle that they run at the same speed.
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Rob

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Bufferstop
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Re: Two different motors in one loco!

Postby Bufferstop » Wed Apr 21, 2021 11:47 pm

It's odd what can happen if you run two motors off one controller, as long as they don't have vastly different performance they will often synchronise, I think it's probably got a lot to do with combining their back emfs, and having a common circuit through the wheels and internal wiring. It certainly seems different to running two locos coupled together which produces a lot of pushing, pulling and banging of couplers.
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Bigmet
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Re: Two different motors in one loco!

Postby Bigmet » Thu Apr 22, 2021 10:02 am

RobLeighton wrote:... if it's a Frankenstein job it's a very good one, the bogie plastics seem to match!

Interesting, never seen that pattern of motor bogie with a vertical can motor before.

It's a matter of luck with two motor bogies taken at random: when twin motoring I tried for a reasonably matched pair (ran similarly independently, much the same current draw and speed curve) as that typically gave quieter and sweeter running. The surviving examples, an Airfix GMR Brush 2 which ill still pull the side out of a house, and the T-H Brush 4 was going well until the brushes wore out on one motor. Once normal life resumes I'll collect it for service from the friend that uses it.


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