CG Formula for delta
07-14-2003, 12:55 AM
#1
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CG Formula for delta
Does anyone have the formula for calculating the CG on a delta wing? I have a 24" at rear, and 28 1/2" to front tip. I've built and flown an enforcer with several mods including retracts with a servo for each gear, and the CG on the plans was very vague. Some told me it really doesn't matter on a Delta, but I find that hard to believe. There at least must be a ballpark.
This will be a rear motor pusher so I can evenly distribute the weight of battery, receiver, etc. Anyone have any ideas?
This will be a rear motor pusher so I can evenly distribute the weight of battery, receiver, etc. Anyone have any ideas?
07-14-2003, 04:08 AM
#2
Senior Member
CG Formula for delta
Those "some".... avoid them in the future. They're complete idiots!
Of course the c.g. matters!
Depending on the airfoil: Reflexed prefers 15%...
Symmetrical can go to 25, but start at 18%
Find the root chord, and the tip chord.
Your m.a.c. will be 1/2 way out to the tip.
Measure that.
That's the mean aerodynamic chord.. the value you use to find the c.g. of the plane.
Of course the c.g. matters!
Depending on the airfoil: Reflexed prefers 15%...
Symmetrical can go to 25, but start at 18%
Find the root chord, and the tip chord.
Your m.a.c. will be 1/2 way out to the tip.
Measure that.
That's the mean aerodynamic chord.. the value you use to find the c.g. of the plane.
