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CG Envelope - Winglets

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Eduardo Fadul

Well-Known Member
Joined
Jun 21, 2010
Messages
74
Location
São Carlos, SP - Brazil
Good Night

I'm a newbie -more than 5 years of experience- Aeronautic Engineer and Aeronautical Technician (with all the hours of Theoretical Instruction but without license because in Colombia Ultralights doesn't count :mad2::mad2:), I participated in all the certification program of the Criquet Fi-156 Storch (75% replica) making some manuals (AMM, KAI, IPC, ......), also I built the LSA Condor and one teenie two, with some experience with composites.

Now i'm designing with the intention of construction the EFA-100 Tigrillo (Eduardo Fadul Aguirre - 100 :gig:)

3d+4.JPG

The conceptual design is done and structural 30%.

Working currently on the manuals too, and I want to really understand the CG envelope, I have all the cg ranges (empty, zero fuel, take-off) but i dont know what is the range at the WTO

cg envelope.JPG (Airframe Stress Analysis and sizing - Niu - Page 34)

At WTO my cg position is 0.18 %MAC, so why there is a range????

Also I want to ask if there is a book with the new airfoils (I had Theory of wing section, but i want the nasa-GW and all the new), and what is the protocol to design the winglets

Thanks for all

Eduardo Fadul
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