Originally Posted by
Ivan
With CFS1, you really don't have a choice about fixing the CoG if it is located incorrectly. My preference given a choice is to put the center (0,0,0) of the model at about 1/3 chord of the wing and slightly below the centerline of the engine on a low wing aircraft because the wing structure and landing gear shift the whole CoG down a bit.
Hi Sparks,
I joined late in this thread, but here goes: My understanding was that the Center of Lift really describes the the lift of the wing. In level flight, it would be balanced out by trim effects mostly from the horizontal stabilizer. Ideally, for most efficient flight, the center of lift should be slightly ahead of the CoG so that the h-stabilizer is also providing a slight amount of lift, but still set up in such a manner that the wing stalls before the h-stabilizer. Some aircraft are set up so that the CoG is slightly ahead of the Center of Lift and the tail has to provide downforce but this is less efficient because the wing has to also counter the tail's downforce.
Reasonable?
- Ivan.
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