If both LC engines are dual motor and/or with smoke on pulling long or heavy trains with incandescent lights uphill, probably not. The main throttle controlled output on the Z-1000 is rated at 100Watts, so it really depends on the trains you try to run. To a lesser degree, the wiring and length of track and connections will also add some resistance that will slightly reduce the power available to the motors.
You may be able to run two short single motor trains simultaneously with smoke off and no or few incandescent lights on the trains. I believe others have mentioned previously that this lesser option works for them.
To expand on Steve's point, the Lionel lionchief power supply is 72 watts. This was probably sized for a single top end power user loco and consist. So you can consider that as Lionel's estimate of a power hungry lionchief unit. I have run two locos and rolling stock on a z-1000 but not two longer passenger trains (I still have some incandescent cars).
just as Watts ain’t what’s powering your engines…it’s the Amperage
Unfortunately Watts are indeed powering your engine.
Locomotives need both voltage and amperage to roll down the track. Not enough of either and you get poor operation, or none at all. For any given transformer, from the smallest to a ZW, Voltage will fall as amperage increases, quickly in fact as you approach the maximum amperage that the transformer can produce. So if you look only at Amperage you'll end up short on performance at some point.
Looking at it another way here's the technical reason that Watts are (Power is) more important: Power = Voltage x Amperage. Unlike Amperage alone this accounts for both Voltage and Amperage limitations associated with the size of the transformer, thus is a better indicator of total performance.
If you concentrate only on Amperage you're missing half the boat.
I think all posters here have made some good points. To summarize:
Watts are the way electrical (and motive) power is universally measured (which is the unit in question in the OP). .
It's also true that electrical current flow in Amps is the number of electrons flowing through a conductor in a given time time (6.242 × 1018 electrons per second) and this is what produces work (energy in the forms of magnetic fields and heat).
And without sufficient Voltage (Electromotive Force) to drive the load resistance, the work won't get done sufficiently to move the trains.
So then maybe the question could be restated to be: How many trains running does it take to equal the minimum load resistance (reactance) of around 3.27 Ohms before this circuit powered by a Z1000 will still function before its circuit breaker trips at around 5 to 5.5 Amps?
There are several different ways to figure out the answer to the question including testing by running 2 specific locomotives and some number of cars on a given track with the tightest curves and steepest grade on that layout and either measuring the current flow or making the Z1000 breaker trip.
... I wonder why gasoline and electric motors are rated in horsepower? And we all know 746 watts = 1horsepower.
Here's an article I found that tells an interesting story of how James Watt may have decided to rate his improved design steam engines that he was trying to sell predominantly to farmers to replace horse drawn equipment. It goes on to tell about how horsepower rating became a common way of referring to how much work could be done by a steam engine and also how this unit of measurement continued with the invention of electric motors.
From other sources, when the internal combustion engine was invented, horsepower continued to be a common way of measuring the amount of work they could do.
It's also interesting to me that James Watt not only improved on the invention of the steam engine and defined horsepower, but also another unit of power, the Watt, is named after him.
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