Ed,

I'll agree that lighter engines can make a significant difference in overall flight preformance.

I now see that the GMS .47 is a little heavier than my O.S. .46 and TT .46 were, but neither of those engines produced the power of my GMS.

My GMS .47 swings an APC 11x5 at 14900 RPM! I don't remember the exact numbers on those other two engines (I don't own them anymore), but if memory serves it was significantly less......Like in the 1-2 grand range. Can you veryfy that?

BTW, I'm a ZDZ 80 RV owner and yes light weight and good power are some of the attributes I like best about ZDZ, but the low price is the one that won me over. It's (my ZDZ 80) a little less powerful than a BME 102, about the same weight, but half the price. I can live with a little less power for a $600 savings, some people can't.

Wiz