Rahul's RC Aircraft and other designs

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.

This is a 40" span KF flying wing Airfoil is KF2, 50% top and 7.5% Root Cord - 25cm, Tip Cord - 25cm , sweep distance -25cm CG -17.5 cm from wing leading edge It has one CF spaning the whole wing.. Latter version had 2 X 3mm spars Bty- 1000mah 3S 2228, 1400kv 7X5 prop AUW with cam - 465gms I did not quite believe in the advantages of a KF airfoil .. but this aircraft flies (glide ratio, and sink rate)  much better than a flat plate wing... and the difference is quite noticeable .. She is a great flyer.. good climb, good glide.. very stable, once trimmed can fly in a thermal with  minimal inputs. Stalls are predictable A video from a on-board cam https://www.youtube.com/watch?v=3VPjojkbF04 The first aircraft broke apart in mid flight when trying to pull up after a high speed pass..  as the design was very good was tempted , and built a second aircraft  on the same lines .. more strengthened (with 2 X 3mm CF  spars in the wing.. the e...