I appreciate your input! My expectations are pretty much blank on this as the feedback in the dozens of threads I've read is all over the boards. I've watched every video I can find and one minute you see a twin edf pushing a mini boat sluggishly going a max of 15mph, and another video you see a single edf zipping a 30+ inch cat around like a rocket.

That's why I was hoping you guys might be able to steer me in the direction of the most speed possible, it's pretty obvious that some folks are making them go much faster than other with very similar "concepts". I figured after all the failures, we'd be able to figure out a way to get a win for this project as it seems to be a non stop(but not 100% of the time) let down for those who have tried.

And I present exhibit A: https://www.youtube.com/watch?v=iUjMlkFFhKM

In my opinion, that's fast.

So, if that's a low kv 90mm EDF on 6s, my assumption is the nacelle used is what gives it the extra push...or is it because he's powering it with a very large motor in comparison to the typical outrunner most use?? I've seen plenty of 90mm edf boat videos going dog slow compared to that thing. I happen to have a 2000 watt 4200kv 2860 inrunner that's looking for a home.......maybe try that instead of the little 15mm length motors? If the issue is getting it up on plane and unloading...we need more power to get it there one would at least think????

And the confusion continues when you bump up into higher sized batteries and larger set ups as eventually the weight counteracts the extra thrust and things seem to plateau. Maybe if speed is my goal....sigh...I just buy a boat with a prop and juice it up. Had to dream a little though....