Rahul's RC Aircraft and other designs

 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 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...

 Here is a design and drawing of a transmitter tray.. It is designed for Radiomaster TX16S, but could also accommodate other transmitters. I made mine out of 5mm acrylic sheet with 3x10mm brass standoff, and 8mm steel threaded rod... other materials can also be used

 Always wanted to build a biplane.. and here is one.. It flies beautifully.. awesome slow speed characteristics, amazing roll rate... it parachutes down with power off Dimensions A simple rectangular wing, box fuselage made out of 5mm XPS sheet/depron makes it very easy to build, and it can be built very quickly. The research on CG of a biplane led to quite a range of literature, from simple to some very detailed ones (incl CLs of the airfoils)... finally KISS prevailed (keep it simple and straight).. The wing cord was taken as distance from the LE of the wing positioned ahead to the TE of the aft wing.. and it worked Another aspect which went through a similar approach was .."whether to have ailerons in top and bottom wing or only one (bottom) wing"... here again, went with having the ailerons ONLY on the bottom wing.. and it works. Electronics Motor - 2212, 1200kv (even 980kv will do, used this as that is what I could spare). Prop 9x4.7, Servos - 4 x 9 gms , battery - 1500 ...

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...

A 1m  Thermal flying wing - Plank Dimensions and details :-             Electronics       a.        Motor = 2206 200KV b.        Prop = 7x4 folding c.        Bty = 2S  750/1000 mah d.        ESC = 30A 8.        AUW = 310g,  Wing area = 220000 sq mm, Wing Loading - 4.65 oz/sq ft, Wing cubic loading - 3 The wing is hotwired from EPS (Thermocole). It has a built-up 10mm CF tow spar  and skinned with 32 gsm fiberglass at 45 degree  bias. the wing tips are EPP . The fuselage is only in the front portion to house the ESC, RX, Motor and battery.. The vertical tail is stuck on a 3 mm CF rod and glued to the wing TE. The elevon is 3mm balsa sanded to a thin TE. The elevon is bottom hinged In the final version, the servos were moved inwards and positioned at the...

  A thermal plank with low wing loading and a low drag airfoil. It has elevons and an active rudder. Dimensions and details Wing Span panel 1 =695 mm, Wing Span panel  2 =298 mm, Total = 1986mm The Airfoil - HS 117. Cord panel 1 =250mm, Cord panel 2 (tip) =150mm Sweep panel 1 =0, Sweep panel 2 (tip) =30mm Dihedral panel 1 = 20mm, Dihedral panel 2 = 150mm The Airfoil is HS 117. Vertical Tail to wing TE distance = 410mm, Vertical Tail cord 100mm, Vertical tail span 230mm Control surfaces are elevons and rudder The wing is hotwired out of EPS and covered with fiber-glass (vacuum bagged). The central portion has a CF tow (5mm) running on top and bottom. The two outer panels of 298mm each are detachable for ease of carrying.  The elevon cord is 40 mm and it is across the whole length of the inner panel. It has a kevlar hinge built into a skin, and the underside gap sealed with mylar (BO_PET) strip Wing area in inches = 723.4 sq inch Electronics 2212 9...

Flying wing DLG  The details are : The airfoil is HS130 Span : 870 mm Root Cord : 196mm Tip Cord : 147 AUW : 125 gms The wing area is 149205 sq mm which translates to       wing loading of 2.74 oz/sq ft, and a wing cubic loading of 2.17,  The templates for hotwiring the wing.  The hotwired wing . Note the fuselage is a 4mm CF rod passing through the root. There is a 3mm balsa root which is in the center of the two wing halves and the CF fuselage rod also goes through it.  The faint line at 30% cord is where the a 3x1mm CF strip will be embedded to act as a spar A view of the wing tip. It gives you a perspective of the airfoil shape.... the foam tore of at the extreme tip trailing edge during handling The tail is made out of 3mm depron stuck onto the CF fuselage spine Also the 3x1mm CF strip which acts as a spar is visible The fuselage with a piece of scrap EPP foam attached tp the CF fuselage spine. This helps in holding the RX and the battery The...