Rahul's RC Aircraft and other designs

 Fast, hotliner design These two are built for speed, and unlike a 3 surface (wing , tailplane and rudder) design, they are wings (delta). The thought was having the max wing area for a given wt and strength and with the least friction/profile drag, and of course ease of construction. (ignoring  difference in Induced drag). Construction is composite, foam, glass fibre, carbon fibre and vacuum bagged,  resulting  in a very strong lightweight structure for its wt. Airfoil is PW 51, with a 1.5 degree washout at the tips. Small wing tips are added to draw out the tip vortex. The LE is reinforced with CF. The wings tips and the centre section of the underbelly has some CF  reinforcements built in. It has 2 layers CF tow of different lengths acting as spar. The paint pattern has been painted directly onto the skin and then vacuum bagged. The control surface hinges are live hinges built into the glass fibre skin. The servos and push-rods are embedded with the wing. All...

 A slightly different 3D plane designed and made by me. Span is 900mm The wings are low AR and highly tapered. It has a deep fuselage, akin to a pattern flyer. The LE of the ailerons are also tapered. Additional vertical side was added via wingtip plates and a dorsal fin. This gives the ac fantastic tracking an handling. All surfaces are made out of 9mm epp sheets, which were hotwired out of a EPP block.  It has a few CF 3x1 mm strips embedded for strength and stiffness. Additional stiffness is comes from fishing line rigging across the fuselage, wings and tail surfaces. This gives the aircraft very good stiffness without adding weight and is very strong (the fishing line is kevlar).  Electronics : 2212 1400kv motor, 9x5 prop, 30A esc, 4 x 9gm servos. Flies witha 1300/1000mah bty.. AUW 500gms.   A beautiful looking aircraft, which also flies amazingly. Even other flyers vouch that it flies better than many brought out 3D kits. Here is the plan

This is a 1200mm plane built with a stick fuselage  The plan pic is below The wing has a Jedelsky airfoil, with the leading 30% cord made of 5mm balsa and the rest 70% cord made of 5mm depron. These two are spliced together and further stiffened with ribs. The ribs are also designed to induce a washout from root to tip.The planform design, specially near the tips also helps in reducing the camber near the tips.... All this is done to reduce tip stalling. It also has ailerons. There is a CF spar glued to the balsa. The Root rib is much thicker and reinforced. The dihedral is achieved but gluing together the root ribs .. they have quite some area in contact with the wing and between themselves.  Here is a pic of the same ..  The tailplane planform is also designed to handle high AoA without stalling. The tailplane is made of 10 x 5mm balsa frame and 5mm depron. This method adds a lot of stiffness without wt or requiring CF.  It has tape hinges.  The tail arm is lo...

 This is a meter span flying wing designed for fast and aerobatic flying.. and it lives up to it The wing is hotwired out of high density EPS. The airfoil is PW51 at the root and PW51 at 120% thickness at the tip. There is no washout incorporated in the wing tip while cutting .. though there is a overall washout in the tip which we talk about latter The dimensions for foam cutting are It has one full length CF spar (4x1 mm) embedded on the top surface. The two halfs are but joined and the joint area has a 3 inch wide FG reinforcement. The motor mount is a ply and balsa embedded into the foam The elevons are 3 mm balsa. Cord 10mm near the root and 40mm at tip. This gives a natural washout at the tips The wing is covered with monokote .. (new technique) The pod top cover is made out  Electronics : 2 x 9 gm servos, 2207 2300kv motor (quad), 5x5x3 prop, 30A esc. I fly it on 3S Molicell Li-ion CG is at 190mm from LE apex She is FAAAAST .. very agile .. great flyer Flight video...

 A miniature version of Slow stick - 800mm span  It has an under-cambered airfoil (like the Slowstick) made out of 4mm depron.  3 Channel, controls are Rudder, Elevator and Throttle ... 2s 1000mah bty Flies great, I have flown it in windy conditions and it nearly hovers and lands with zero speed. 

 Here is a small, powered swept wing..  The wing is hotwired XPS foam, covered with with newsprint and painted .. The fuselage is a coro box with some ply formers.. elevons are 3mm balsa.. The span was 800mm  It was a great fly and was fast.. unfortunately in one of the flights the esc caught fire and it crashed ...  

 This is a 1 meter pattern aircraft ... not a typical shock flyer. Dimensions (mm) The whole aircraft is made out of EPP The wings was hot wired out of EPP.. RAE100, a medium thickness airfoil was chosen over a thick airfoil to reduce drag. It has two 3X1mm CF strips glued on the top and bottom surface at 35% cord, and one outrigger to the tip TE. The ailerons are 6mm depron. The horizontal and vertical surfaces were 10mm flat plate EPP with the LE rounded. The TE was left as it is to have requisite strength. 3X1mm CF strips are glued along the hinge line for strength The fuselage has a EPP 50mmX40mm central spine which has 3 CF rods (3mm) glued along the length for torsional and longitudinal stiffness. The wing and the horizontal and vertical surface is mated to this central spine. The overall outline of the fuselage is a 10mm EPP which is also glued on the central spine. The battery is pushed in a through slot in the spine (between the CF rods). The slot is cut as forward as pos...

  A 1500mm size thermal ePowered plank wing. Composite construction Medium AR, low WL .. Elevons moved outboard to enable inboard wing generate max lift during slow thermalling.    Dimension Sketch Airfoil BW050209 Wing area 39.43 sq dm CG @ 10% SM = 100 mm, @ 15% SM = 87 The wing was hotwired out of high density EPS (thermocole). Built-up full length CF spar. Tow width on top 18mm, bottom 24mm. The spar has a 5 x 3 mm vertical balsa compression webbing buried below the CF tow (full length).. The built-up spart is at 33% of cord. The routed 5mm groove for the vertical compression webbing visible. Also you can see the shallow trough which has been sanded for the CF tow cap of the spar. A picture of the wing core with the CF tow for the spar caps. A view of the laid out built-up spar This one shows the vertical webbing Built up spar ..all elements in position and weighed down …. awaiting for the epoxy to cure the wing with the spars in place.. is is...