ORIGINAL: Lnewqban</p>
ORIGINAL: crazy nick</p>
Sig somethin extra, battery is all the wway front, going to move the uengine foward a 1/4 to 1/2 & try again
You will gain almost nothing by moving the engine that little.</p>
As Mike said, extra weight is a better friend of your plane than any unbalance.</p>
Just in a loop or tight turn, your plane will weight much more than what the static balance shows,.......and will still fly.</p>
Per angle of banking, the wing loading due to centrifugal force (virtual weight of the model) increases as follows:
For a 20 degree bank the force increases in 6%
For a 30 degree bank the force increases in 15%
For a 40 degree bank the force increases in 30%
For a 50 degree bank the force increases in 56%
For a 60 degree bank the force increases in 200%
For a 70 degree bank the force increases in 294%</p>
Easily, your plane can weight three times more during a bank of 70 degree!</p>
Consider this:</p>
http://www.rcuniverse.com/forum/fb.asp?m=10890949
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Note that the key words above is (virtual weight of the model).
If that listing is extended to a 90 degrees bank the force would become "infinity and that is not realistic. .</p>
Those figures imply a non-mentioned condition that the turn remains level in altitude which is seldom achieved by model pilots.</p>
In so called "knife edge" flying without loosing altitude there is no lift provided by the wings and no G force on the wings. The lift is provided by the airstream hitting the side of the airplane and some contribution by the upward inclination of the thrust line. We do not have any "virtual weight" or any weight carried by the wings.</p>
Note that since the air resistance (creating the aerodynamic force) increase by the square of the speed ratio (example: 2 times the speed then 4 times the forces) if then we have 20% more weight we have 20% more lift at a 9.54% speed increase.</p>
How many will notice the difference in their model flight?
Where a difference is more noticeable is the distribution of the masses in a model.</p>
Compare a foam model with most of the weight very close to the CG to a balsa model in which the masses are much further away from the CG. Any acceleration of the masses in axis rotation is slower due to the longer moment-arms. The pilot may notice a slower response to controls using the same amount of surface deflections at the same flying speed. Again it is doubtful that the average pilot will notice.</p>
Just interesting factors to think about.</p>
Zor</p>
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