Rahul's RC Aircraft and other designs

A fast rc aircraft for flying for windy days (not a floater). Main design aspects, around 36" span, Plank Flying Wing, like funjet (not swept back and hence no twist), low drag, higher wing loading,  high power /wt, symmetrical airfoil. Material blue foam / insulation board / XPS..  Airfoil NACA0009, thickness 9%. , hotwired the final dimensions are 1. Span =  880mm / 34.6" 2. Root cord = 250mm / 9.8" 3. Tip Cord = 150mm / 5.9" 4. Sweep = 30mm / 1.2" CG @ 15% = 44.5mm / 1.75" Wing area = 17.52 sqdm / 271.6 sqinch / 1.88 sqft The wing was hotwired out of blue xps. The fuse is also blue xps, hollowed at some places , with some strengthening Initially I was planning to have a CF sparred wing covered with monokote ..  hence, according to the earlier plan , the wing  has CF spars  and a CF tow, while the fuse has balsa and an aluminium channel embedded for strength. Latter on, in midst of the construction, decided to cover the whole aircraft w...

This is the build of a large coro delta It is made out of 3mm and 2mm coro..  Wing Span - 1200mm Root Cord- 765mm Tip Cord-250mm Sweep -485mm Dry weight - 1020gms Motor ;3630 1100kv, 40 amps, 3S 2200mah, 2 x 12gms servos CG -280mm from nose tip (at 15%) With a total wing area of 609000 sq mm and a AUW of 1200 gms the wing loading is at 6.4 oz/sqfeet, which is in the region of slowflyers.. this combined with a not too small Reynolds number for the avg cord, translates to  good stall characteristics. It is quite a big aircraft. The underside is 3mm coro and the topside is 2mm coro..  The spar is a  tapering XPS foam wrapped in fiberglass. This makes the spar very strong.. in fact this spar is the only load bearing structure in the whole aircraft. For gluing coro to coro, fevicol SR (a rubber based solution) was used and epoxy was used for foam to foam or foam to coro or wood.  The TE was also taped up after gluing. The controls are through full l...

One of the exposed part of the antenna in one of my V8FR II FrSky receiver had broken To repair it, I just stripped off the outer shielding for 31.5mm, in the damaged antenna... have a look at the pics below. The difference in total length is apparent and does not matter much so long as the exposed/unshielded length is correct.