Took the Mini IFO over to the church to see what would happen if I depleted the lithiums. My thumbs almost gave out before the BEC finally kicked in but I found I still had control as still power in the battery pack
At least now I know! Don't know how long I flew as forgot to set timer on the Eclipse. I did notice the plane was loseing thrust badly before the bec kicked in and was getting hard to keep it airborne. So would normally quit and install another pack before getting to that stage.
Removed the GWS Fan on the Tilde and installed a A unit. Flies great with 9 X 7 prop but not as much better than with the fan. I think a S1 or S2 would do better. Of course I totally covered the wing with Zagi Tape so it is a little heavy (but sure looks better!)