Check to make sure that you have vented the tank properly.

I have a Boomerang Torus that I had flown over thirty times with a 30# Super Eagle with out a hiccup. Just before Florida jets I put a new kero start Rhino in it. At Florida on Friday I had three flame outs in a row. I asked Juan at the Jet Central Tent to help me out with it. he came over and downloaded the parameters from the last few minutes of run time and showed me how the pump power was increasing yet the Rpm would start decreasing to the low rpm cut off point. There was a fuel delivery problem. I.E. fuel was not getting to the pump after just a couple of minutes of run time. Examination by my self and and some of the other fellows there (thanks for the help Joe Raf. and everyone else that took a look at it) we determined the vent tube going into the Sullivan tank supplied with the boomer was too small. While the clunk line tube was a larger dia. brass the vent tube was the same size as what we use on .40 size glow motors! I changed out the vent tube for a larger dia., changed out the UAT for new BV unit (nothing wrong with the old one, but while I was in the mood....) and changed out the tygon for large, harder, poly line. Six flights on Saturday at FJ and five more with it here at home and it has been flawless. When I put in the more powerful Rhino the fuel draw was greater but the vent could not move enough air so I was starving the pump. Lesson learned.

It is the little stuff that will drive you crazy. the big stuff is usually obvious.

Good Luck!

mike