Barry,

You bring up many good points about how to govern this. My original idea of using the 1000 watt limiter is the best way because it takes all the variables out. My thought of trying to limit using the small batteries is a stretch, but I have proven that the Rhino 20C 4S 2350's are only capable of sustaining around 600 watts. The change from the 9 x 7.5 to the 9 x 9 used more power, but gave no more speed which points to limiting returns from the battery.

Using the limiter would allow the use of any power-system and then would bring it back to the thumbs. I do believe that the 1000 watt limiter is enough especially if we keep it at an entry level event as it should be. But these do cost $50 ea.

Going to the 42-50 means you will have to use at least 5S but probably 6S to get any rpm. I have been having that problem with the 35-48-1100. The 42-50 doesn't have much Kv so that is where you will run into trouble if your intention is to run 9" props.

Bottom line is that there are many motor/ESC/Battery combos that will work in this event. Settling on one system would need to be a local deal and would greatly depend on availability of product. I look forward to hearing about your testing with the 42-50.

Take Care,