oh the outrunner... that was easy, just drilled three holes in the jet drive mount where I wanted the screws in, made the holes the same size as the screws and just screwed them directly in, had enuff bite.

This was done in the boat so the holes were off, used a 20cm long flexible drill bit.

Your using a 6600? Geez a bit overboard? If these drives are similar to the kehrer drives, the jet would run on 15000-20000 loaded. I'm now going to use a 3200rpm/kv 25 amp (the red motor in the pics) at 7.4v, I bought another 11.1 to replace the lipo I messed just to see if I can get the boat to run at that speed without the porpoising.

just rough calc, 7.4X3200= 236800 * .80 (rough of rpm underload and running at motor efficiency) equals 18944 so I am in that zone.

at the 11.1X3200 = 35520 unloaded * .80 =28416 loaded optimum running

So on the 11.1 I should be running hotter because it will be pulling more amps to try and get the motor to the running speed (these are all rough, im sure someone else can get these numbers a little better).

Not sure on heat yet as I haven't run the 3200 on the single 11.1 lipo long enuff because it runs at 12 amps constant and bursts to 20, and because the esc is set for 25 and prolly bursts higher I only did very short runs and very gradual build up. When other comes will let ya know. I would like to try no cooling to see if at 7.4v the motor is ok, for the times I did use it, I actually noticed no heat build up at all, infact the motor was cold.

Here's short vid I took yesterday to see power of 3200 on 11.1v http://www.youtube.com/watch?v=CG8XScOJ4CA, way quicker.


Also as a note, the 1600rpm/v outrunner running on 10 amps, I could feel heat building up for the same run time, but not overly hot, just noticed it was heating up.

The point where it stops the shaft from turning is for cooling?? I gotta get my german up, these plans are a pita to read.