ORIGINAL: Missileman
I agree but since most flyers are well aware of glow engine sizes for airplanes and alot of airplanes are rated by their glow engine size but can be flown electric I think it would be nice if they rated them by those numbers so we can switch back and forth in our hobby pursuits with less confussion.
Yes... E-Flite sort of does this, but their numbers are somewhat deceptive.
e.g. their .46 motor is not really the equivalent to a normal .46 engine.
E-Flite stretches the truth a bit, implying that with the lighter weight of LiPo battery, the change in the AUW compensates for the lower power.
You end up having to go at least one size up to get equivalent performance.
Tower also now provides a nice chart of motor to glow engine equivalences on the Rimfires.
I've found the Tower equivalence chart to be more accurate than the E-Flite nomenclature.