Well I don't know which Yak you have but I watched my buddy with a 30% Yak and the Brison 3.2 and the plane weighed 18.5.

In his Edge at 18 pounds the Birson with awesome.. in the Yak it was pretty weak.. pull up was poor to be honest. Yaks have a lot more drag. I was a bit disappointed in the performance.

I can tell you that Brillelli 60 has within 100 rpm the power of the G-62 and is as light as a DA 50 RTF. That's what I would be dropping in her