Quote:
Originally Posted by Mister-T
Something funny coming from rcgroup forum, by Mr Del castillo :)
That said, we are porting some of the Mamba code over to the Phoenix -- we worked on Mamba startup routines for several years -- the Mamba code has to start an enormous inertial load (heavy car!) with a motor that generates very little torque. This was a much much bigger problem than starting a prop, and we needed to do some things in a VERY different way than we did with the original Phoenix software. This is really an end-around for the problem -- rather than trying to tweak the older software, we are upgrading almost the entire start software routines. It's a large job to port this software, as the hardware on the Phoenix and Mamba is very different -- but we feel it will be the best solution long-term, as the Mamba software is much more intelligent about very low RPM motor state.
So I wonder if CM36 motor weren't torquy enought why didn't you go for some kind of outrunner ?
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Mostly because outrunners have several drawbacks -- first of all they can't be well sealed, so dirt and junk will get in them quickly. Secondly, they have a very poor RPM/torque range -- yes, they have better torque than a two-pole slotless inrunner, but they have a poor range of torque by RPM. Where the slotless inrunner can run 50,000 or 60,000 RPM with no problem at all, still generating good torque.
Patrick
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