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About Blacktron2

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  1. Blacktron2

    Weekend 9V Layout

    Thanks for the details! A very neat layout. Looks great with all the buildings - especially the train shed.
  2. Blacktron2

    Lithium or alkaline?

    I am quite shocked to hear that the alkaline batteries last so little. AAA batteries are practically,capacity of 850 - 1200 mAh. Based on this table, the mAh capacity of alkalines is quite comparable to NiMH, though the terminal voltage is higher (1.5 V compared to 1.2 V). This should give a higher motor angular velocity at each PWM setpoint since the average voltage applied across the machine winding should be higher, resulting in more current and higher back-EMF. Anyway, that's just an irrelevant technical detail. Assuming constant current draw, the actual current should be 6 A (6 A = 6000 mA , 6000 mA * 1/6 h [10 mins] = 1000 mA/h as per the table below). That's a lot of current for these tiny cables. If I am not mistaken, do PU Hubs have overcurrent protection? It has been a while since I looked into it. My guess is- busted batteries. Chemistry Common Name Rechargeable Typical Capacity (mAh) Voltage Zinc Carbon R03, 24D No 500-600 1.5 Alkaline LR03, 24A Mostly No 850-1200 1.5 Li-FeS2 FR03, 24LF No 1100-1300 1.5 (1.8 max) Li-ion 10440 Yes 350-600 3.6 - 3.7 LiFePO4 IFR10440, IFR10450 Yes 250-300 3.2 Li-SOCl2 (10450) No 600-800 3.6-3.7 Lithium - Yes 400-600 1.5 NiCd KR03, 24K Yes 300-500 1.2 NiMH HR03, 24H Yes 600-1300 1.2 NiOOH ZR03 No 1000-1200 1.5 (1.7 max) NiZn - Yes 500-700 1.6 - 1.65
  3. Blacktron2

    Weekend 9V Layout

    What a great panoply of 9V-era trains! And since I am oblivious to the inner workings of the track, can you independently regulate the speed of each train? It seems that you were doing so by - not successfully at the bloopers section!
  4. Blacktron2

    LEGO Trains 2022

    Hello all. For those of you who have built and run the new trains, what do you think of the new plastic, decoupled wheelsets? I am in the US and the new trains have not yet been released. Using the standard 40-stud curve, my older trains slow down considerably since the inner and outer wheel angular velocities would prefer to be different but cannot be due to the coupled wheels (no differential in trains!). This makes me hope that the curve-induced friction will reduce due to the decoupled wheelset approach. On the other hand, the old wheelsets were a combination of plastic housing and a steel rod, which had a relatively low friction coefficient. I suspect that the plastic housing / plastic rod friction coefficient might be higher. Thanks!
  5. Blacktron2

    LEGO Trains 2022

    I also love the new cargo train. The locomotive looks great and the rolling stock is refreshing. The passenger train locomotive and the rolling stock look blocky compared to 60051 and 60197. It is a bit reminiscent of 6738. It feels like a throwback to the 90's-style trains. It also contains more straight track (8x) compared to 60197 (4x). The front lights do look quite nice. As someone pointed out it might be a new design.