Actually 52 ozs with a small 900 ma batt-which is plenty for the single ignition
fuel tank required is 10 ounces so - net difference is less than 52 /28.
The Evolution part numbers are listed above in post# 17.
The glow engines of equal thrust will always weigh less and the fuel volume consumed will always be more .
The two are locked together -
Wing loading goes up -22 to 26 (based on 8lbs to 10 lbs) however, thrust goes up . I get 16 pounds here at 4350 ft not calculated -measured.
It s a compromise.
This size model is right on the cusp of choosing glo /gas-- If it was 100 squares more -- the choice of the glow would be far less-for me.
My Saito 100 setup was 8lbs 2 ozs -so I can easily tell loading difference at 10 lbs 2 ozs. two, completely different performance parameters.