To "The K."

Have to differ about always being able to handle more than necessary power...

Not on the matter of power, in this case, but fitting it all together... The Baby Streak is a small model! Balance? Tank?

Mike got it right about the engines listed on these ancient kit designs. Not much power from the available 1/2A engines until the Space Hopper, and I'd like to see how anyone could mount that birdcage onto a Baby Streak...

Modern .049/.061 engines have excellent power, and that can allow longer lines to reduce flier RPM, as well as greater model speed. ALL things aerodynamic improve with more airspeed!