Rahul's RC Aircraft and other designs

 This is a build log for a large plank flying wing. I named it "Pelican".. loosely based on the Pelican mentioned in nestofdragons The basic dimensions and calculations are as below..  The airfoil is phoenix The central section and each of the outer section are meter each. The outer sections have a dihedral.   It would has a central elevator and two outboard elevons/ailerons.. synchronized through TX mixing  The wings are hotwired out of EPS (closed cell polystyrene- thermocole) . It has a 1.25 inch top and bottom unidirectional carbon fiber cap spar and a 3 mm ply compression web across the whole wing. The whole wing is laminated one layer of 100 gsm fiber glass (unfortunately that was the lightest FG I could lay my hands on).. with the LE having a extra layer to form a Dbox The  wing is in 3 pieces (each of one meter), The outer panels are joined to the central portion by  rectangular aluminum bars and also locked with 4 x 3mm bolts   All t...

A fast composite aircraft  Span : 48" Root Cord : 14" Tip Cord : 7 & 3/4" Sweep : 3/4" AUW = 74 oz This build stared much earlier but had stalled after the wings were made.. finally after delay of around 6 months the work on the fuselage was resumed.  This was also a my experimentation with different aerodynamics and materials  and construction techniques... From an aerodynamic perspective, choice of airfoil, multiple control surfaces in each wing and their inter-relatedness in the control of the aircraft, factoring the fuselage for CG considerations .. From construction, materials, use of  composite uni Carbon fiber tape as the wing spar. Kevlar hinges, refinement of my fiber glassing technique, Undercarriage mounting, thin fiberglass cowl molding There were many learnings, specially how the weight went much higher than expected due to wrong decisions and construction techniques, and how to avoid damaging kevlar hinges,  The airfoil preparation for hotwire ...