Rahul's RC Aircraft and other designs

 This is a Plank flying wing for SAL or bungee The dimensions are  Span = 875mm, Root cord = 260mm, Tip cord = 160mm, sweep = 60mm. 20mm constant cord full length elevons The wing is hotwired out of EPP and then laminated with thin iron-on laminating film. The airfoil is PW51 7% thick at the root and PW51 7.5% thick at the tip. It has a 1.5 degree washout and a 45mm dihedral at the tips.  It has one 2mmCF spar glued to the bottom positioned at 40% cord. There is also a spar on the top surface biased to the rear to avoid elevon reversal. Two 9g servos are positioned vertically into slots cut on the top of the wing. The position of the servos are driven by the thickness of the wing at that part and distance from CG. The full length elevon is a tapered 3mm balsa with fiberglass lamination. ....Note I had to increase the elevon cord at the tips by 12mmto improve the control response (after the first flight trials) The fuselage is a 3mm CF rod glued onto the bottom of the wing...

 Here are the details of a SAL 1m plank wing glider The airfoil is PW1211. The wing is hotwired out of high density EPS. It has a 1mm CF rod epoxied to the underside , and a 5mm  wide CF tow lamination on the LE underside.. these act as spars. The TE has a 2 mm balsa 30mm wide, part of which is also the elevons, and balsa wing tips Fuselage is a 3 mm CF rod .. with some scrap balsa glued onto it to in front to act as the place to attach the RX and the battery.. the front part of the fuse is covered by a PET sleeve The wings are but joined with the 3mm CF rod sandwiched in between  and have two additional balsa joiners glued from top The whole wing and elevons are finished and coated with water based PU sealer mixed with light weight crack seal.  The rudder is glued onto the 3mm CF rod sticking out behind the TE It has two 4.5 gms servos controlling the elevons , and the 1s 350 mah bty directly plugs into the Rx. Dimensions Root Cord - 230mm (220 mm foam) Tip Cord - 1...

 A pod and boom performance glider. The wing changes camber, through flaperons, depending on the flight mode... three modes : normal, thermal or speed.. Dimensions (ignore the cg like sign near the tail.. it is the origin in the 3D software) Wing area : 21.05 sq dm. CG at 10%SM - 65mm from LE at root cord The wing is a re-purposed skysurfer wing which I got from a friend, and was in a pretty bad shape. The two halves were joined. Two 3x1 mm CF strip was cynoed to the top and bottom at 30% cord. The tips were clipped by 50mm, couple of holes, dents and scars filled & finished and a thin fishing line was cynoed to the LE.  The whole wing was given three coats of water based PU mixed with talc as filler, sanded between coats and finished with two coats of paint. ... It has flaperons, so the original aileron had to be cut out and enlarged. The Flaperons are 6mm balsa which has been shaped and sanded to the airfoil The fuselage is pod and boom.. The pod is made of 3mm balsa, wi...

 This is a small and simple Prandtl glider Span- 890mm, Root cord = 115mm, Tip Cord = 30mm, Sweep = 24 degree Will try out as a chuck, DLG and tow line It is a fairly simple contraction. The camber drops to 0 degree at 70% of span, and at the tip the camber is 0 and the washout is 9 degrees The topside.  The underside The fuselage is a just a stick to enable a small weight to be put way forward to get the CG right A side view. Notice the washout in the closer tip, the camber at the root  

A "plank" flying wing  Details 1. Span 60" 2. Root Cord : 11.5", Tip Cord : 7.5" 3. Airfoil : PW 106 4. AUW : 605 g It is a "plank" flying wing, with very moderate taper. The wing is "hotwired" out of EPS a.k.a "thermocole". It has a 1.5 mm X 3.0 mm CF strips glued on the top and bottom surface of the wing to act as spar. The whole thing acts as a beam, and with the CF under tension becomes very stiff.. and is very light weight.  In the past I used to cover the foam with paper. This time, it has been covered with monokote, ironed-on. With some testing, the suitable temp was found which stuck & shrunk the film without damaging the foam. The wing covered with monokote, came out very good. The elevon is a constant cord elevon @ 10 % of wing area some pics The hot wired cores The reinforced roots with the joiner tubes. Had to use some polyurethane glue to harden the grooves, and fiber tape to reinforce the whole a...