Rahul's RC Aircraft and other designs

A fast composite aircraft  Span : 48" Root Cord : 14" Tip Cord : 7 & 3/4" Sweep : 3/4" AUW = 74 oz This build stared much earlier but had stalled after the wings were made.. finally after delay of around 6 months the work on the fuselage was resumed.  This was also a my experimentation with different aerodynamics and materials  and construction techniques... From an aerodynamic perspective, choice of airfoil, multiple control surfaces in each wing and their inter-relatedness in the control of the aircraft, factoring the fuselage for CG considerations .. From construction, materials, use of  composite uni Carbon fiber tape as the wing spar. Kevlar hinges, refinement of my fiber glassing technique, Undercarriage mounting, thin fiberglass cowl molding There were many learnings, specially how the weight went much higher than expected due to wrong decisions and construction techniques, and how to avoid damaging kevlar hinges,  The airfoil preparation for hotwire ...

The whole exercise of design, construction/build and trimming of a Flying Wing. Requirements Wanted an aircraft which could fly long in a calm (thermal) or on slopes (windy)… . Structurally wanted maximum use of locally and easily available material. Should be easily transportable. Easy to build.. span around 48” to 50”. It would be hot wired EPS(thermocole) covered with paper. This keeps the weight down and gives a good airfoil adherence.  Planform •   Opted for a flying wing on basis of wing loading  and less drag, and the fact that I would not have to construct a fuselage.   Balsa with covering was out of scope. Reynold number is estimated would be around/below 100000 Construction method •   Hot wired EPS(thermocole) covered with paper . This keeps the weight down and gives a good airfoil adherence. Design •   Did not want to go with an plank design primarily due to pitch response issues  with a high aspect ratio in a...

Some of my earlier  models.  I do my design calculations, and draw straight on foam or newspaper templates … hence no plans. HIGH WING TRAINER This is one of my earlier planes.. called it the ‘Phantom Flyer’ ·           40” span, ClarkY airfoil, hotwired, coloured tape covered.. the wing has an aluminium channel spar in the centre ·           Coro box fuse ·           1000KV, 8 X 3.8 prop, 3S ·           Elevator, rudder and throttle Flies well. Does ROG and glides nicely….. a real trainer, can take on a lot of abuse… flies hands –off  after trimming....  (these photo was taken after they were  retired and was being given to a friend.... hence no electronics) HIGH WINGER Another  high-winger… not given it any name          ...