If size is constant... and wing loading ncreases... minimum speed to prevent stall increases, because a higher angle of attack is needed at any given airspeed.

Keep the engine and propellor cnstant too... and maximum level flight airspeed decreases. Again... this is due to the higher angle of attack... effectively presenting more frontal area and producing more drag. (simplistic... but good enough.)

Keep the same structure with the increased weight and you have an airplane that can not survive as many G's in aerobatics. (Its a really bad idea to loop a bomber with a full bomb load.)

The heavier airplane will be less susceptible to wind gusting effects. More mass with the same basic area for the gusts to work on means it takes a stronger gust to bounce the airplane around as much.


When dealing with an electric model... you have a problem f having to carry a HEAVY battery. that and motor technology kept electric models from progressing well for a long time. Newer battery technologies and motor designs have changed that... yo can now get a model that with the electric motor and battery will weigh LESS than the glo power version with full fuel and have a longer flight time with the electric. (but its still a little expensive to do with planes larger than the indoor models you see advertised...)

Eventually... I expect electric power to dominate many areas where glow power dominates now.