A elegant a BOW WING

Sometime back had an itch to make a slightly swept plank .. a BOW WING . A very efficient and elegant planform .. influenced by Peter Wick (of PW airfoils fame)

So here it is :

It is of composite construction , eps foam, CF and fiberglass and has a detachable tail boom for easy storage and transportation.

Details of the DESIGN, PLAN and CONSTRUCTION are at:  https://myrahulroy.blogspot.com/.. please visit and you are welcome to use it.

A flight video of its maiden flight is here: 

It flies as beautifully as it looks... amazing glide ratio, tracks well, no adverse tendencies..... On a 8 mins first test flight with a 1500mah bty the voltage had dropped to only 4.1v.. maintains altitude at 25% power and much of the time it was gliding power off.
It has very less drag, does not slow down and due to ground effect landing requires skill... Planning to incorporate split drag rudder as brakes...... Feel free to comment.

Happy Flying
Rahul

Very nice 

here is a new flight video



(I really need to improve on the video/photography aspects.. )

@rahulroy31

I agree. Your work really deserves better videography.
Like Dominic's EssentialRC!

Regards
Iyer

Added airbrakes ..as the aircraft was fast and did not slow down adequately during finals, and considering the field limitations we have.

Here is a video of the operation of the brakes. It is operated by one servo and activated by a 3 position switch. It has two positions, full and half. The design keeps in mind that the tail boom is detachable for easy storage and transportation, and assembled at field.
Also the edgeTx call outs are "brakes-on" for both full and half, and the "off" callout is "butterfly off" as "brakes off" sounded very similar to "brakes on".. (will try and get a different sounding .wav file).

https://www.youtube.com/shorts/SQCeUOJVRXE

@rahulroy31

Please do let us know how effective they are.

Reminded me of a towline glider I had designed and flown (in 1981) with split rudder airbrakes.
Even had a releasable towhook.
I like to imagine that I was the first in India to incorporate these features!
Split rudder was spring loaded to close, had pull pull lines, and a sliding servo!
No mixing, not even servo reverse then. The Cox servos with silver label turned one way, and the gold label the other way. 72mhz.

Regards
Iyer

It is very effective.. and the good part is it purely slows down... without and loss or increase in lift. Hence very manageable and predictable behaviour. Also with very minimal structural changes to the original airframe

And I can imagine your set-up....cutting edge in those days of Free flight and dethermalizers.