Rahul's RC Aircraft and other designs

A swept flying e-powered wing.. this is loosely based on the "Sparian" with changes to the wing and fuselage .. and with e-power. The dimensions : Wing area = 26.85 dm sq, 416 in sq AUW = 650 gms  CG @10% SM = at 148 mm  of RC from LE Wing loading at 650 gms AUW = 7.93 oz/sq ft, WCL = 4.66,  stall speed =  22.2 kmph The wing is hotwired out of XPS (Blucore) and skinned with 80gsm fiberglass (one layer). It has a 10mm wide CF built-up cap spar on top and bottom, across the whole span. It is reinforced with a 30mm wide CF built-up spar to upto 230 mm from root, both top and bottom Fuselage is a simple box made out of coro with bamboo skewers inserted into  the flutes at certain areas for strength.  The wing is mated to the fuselage by two 8mm nylon bolts and then the edges are hotglued. This makes secured seating and at the same time can be disassembled, in case required.  Also vortex generators have been added. 5 sets of VG,s 70mm apart, extending, in t...

 Javelin is a high aspect ratio swept flying wing. It is designed for high performance  and uses modern airfoil and construction techniques.  The planform of the wing is as above with inboard flaps and outboard elevons. It has a fuselage pod and wing tip vertical fins,  Span : 1700 mm Root and Tip cord : 175 mm Sweep : 22.5 degrees or 353mm Flaps : length 240 mm, cord 30 mm, starting 25 mm from root at the TE Elevon : length 340 mm, cord 30 mm, starting 3 mm from tip Airfoil : HS 522 standard thickness and camber. It is low drag , low Re airfoil . The details and the .dat file can be found here  https://www.aerodesign.de/english/profile/profile_s.htm#hs522 Twist : 4 degrees AUW : 840 gms  Electronics : 2212 1400kv motor, 30A esc, 9X4.8 prop, 4 x 9gm MG servos, 3s 2200mah bty. (the electronics used are more from what I have, rather than the most suited) Wing Area : 297500 sq mm, 461.13 Wing loading : 9.36 oz/sq ft, and Wing cubic loading : 5.2 CG ...

This is a build log for a 54" flying wing with a blended fuselage  Made out of Styrofoam and hotwired Wing Span -  54" Airfoil - MH 64 Root chord - 14" Tip chord - 7" The wings were hotwired out of styrofoam based on a MH 64 airfoil. The spar was a strip of 1X3 carbon fiber glued in a shallow groove on the top and bottom surface of the wing. The two strips of CF act like a I beam with the foam in between, and being very strong in tension, makes a very rigid wing. There was a central section 6.5" wide fuselage, which was blended with the wings. This would help by having more space for power train & electronics  The CFs extended into the central section , which gave more rigidity and strength and intregrated the wings and fuselage better The LE was covered with very thin fiber glass to reinforce it against dents A view of the wings and fuselage joined together.. note the space being cut for electronics and battery.. . this would lat...

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...