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Old 04-20-2010, 07:33 AM
  #7  
jester_s1
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Default RE: How big a problem is to much engine

As mentioned above, tip stalling will be your biggest worry. I'd expect torque effects on takeoff to be a worry too, especially if you want to takeoff in a scale like manner. Of course with that plant, you could probably go straight to vertical in about 6 feet! There is also the increased loading on the airframe. I remember from somewhere that an aerobatics plane will take around 10 G's on the spar in the hardest maneuvers. So if you add 2 pounds total, that's 20 extra pounds of stress that the wing and attachment area have to take. Few planes are that overbuilt.