MAC 10T Speed

Hello E-S,

after I abandoned my "250W Tow Truck" for the moment ( https://endless-sphere.com/forums/viewtopic.php?f=3&t=99529 ) I am going to build a heavy but reliable commuter. The wife is going to pull the kids with her BoschBike.

I am somehow inclined to the MAC, since it has a huge fan base, and I get spare parts in the future. There is one thing I don't understand:

When configuring at em3ev the winds have approximate speeds: 10T is supposed to run 40kph at 48V (13S?) and 26". Which should result in something like 32 kph at 36V (10S) and 26", which would be rather ideal.

When I run the same system in the grin motor simulator I get 40kph at 36V (10S) and 26".
In the simulator the 12T runs about 30kph at 10S and 26".

What am I not getting here?
Most ES-Posters recommend both sites so I trust both. I guess in this case one of them has an error?
Which figure is correct?

Thanks,
Phil

The 40 kph given by the grin simulator is the maximum speed. No torque is produced at this speed. 32 kph is a more realistic top speed on flat ground.

Ah, OK. This is a theory vs reality thing.
Thanks!

The simulator is supposed to be a real world simulation. I get 32.7kph with 10T on 36v:
https://www.ebikes.ca/tools/simulator.html?motor=MMAC10T&hp=0&cont=C20

Does the simulator say speed at 48V" or "speed at a fully charged 48V battery (14 in series battery is often referred to as "48V"..)"
The latter gives 58.8 Volt fully charged, a lot more than 48 Volts, actually a 22 percent increase. Just a thought.

The simulator seems to use a 75%-ish SOC when selecting a pack from the dropdown list. The 48v packs are simulated as around 50v at rest (and it simulates voltage sag, so actual voltage under load is lower, closer to the nominal voltage).

Also, the simulator correctly distinguishes between nominal 48v (13s) and 52v (14s) packs, and has a few examples of each to use in the simulations. You can also run with a custom pack / SOC by selecting your own open-circuit voltage, capacity, and internal resistance for it to use in the simulation.