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Old Apr 06, 2012, 03:32 PM
Billy88 is offline
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Thanks all for your feedback!

@Bruce: Hi, my friend, I understand about the negative Cm on a Clark-Y when used on a Delta wing configuration.

1) Would you be kind enough in telling me the references to back this up? - Is the Pitching Moment Curve, Cm, i'm not familiar with reading Cm curves or how they look... so could you please include another example alongside the Clark-YH Cm representation.

2) If i choose a neutral or + Cm aerofoil then i MAY be trading-off another aspect like high-lift @ low R.E. which is important for my project given the limitations in design like wingspan.

Also these Q's are open to all...

3) Looking at Cl-Alpha curves please explain how to know what is a strong Cm value & what isn't.

4) Can pitching moment not be corrected by relocating the CG of the battery etc (within the fuselage cavity of the aircraft) rather than choosing another completely different aerofoil?

5) Is a reflex aerofoil easy or hard to manufacture...it's a college project... we dont have state of the art machines just milling/CNC machines etc.

Thank you all!
Will be looking forward to your responses!
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